- Population: 1,016,315 (Change since 1990: +2.3%)
- Created: October 1, 1812
- County seat: Clayton
- Largest town: Florissant (Pop. 50,497)
- Name origin: City of St. Louis
- Affton (Unincorporated)
- Population: 20,535 (Change since 1990: -2.7%)
- Latitude & Longitude: 38°33'02" N, 90°19'59" W
- Elevation: 609
- USGS Quad: Webster Groves
- Allenton (Unincorporated)
- Latitude & Longitude: 38°30'13" N, 90°40'33" W
- Elevation: 492
- USGS Quad: Eureka
- Post office: Dec. 7, 1853 - Now
- Altheim (Unincorporated)
- Latitude & Longitude: 38°37'53" N, 90°29'16" W
- USGS Quad: Creve Coeur
- Post office: Oct. 7, 1884 - May 31, 1904
- Arbor Terrace (Unincorporated)
- Latitude & Longitude: 38°42'00" N, 90°16'60" W
- USGS Quad: Clayton
- Ascalon (Unincorporated)
- Latitude & Longitude: 38°42'03" N, 90°24'34" W
- USGS Quad: Creve Coeur
- Ballwin (Fourth-class city)
- Population: 31,283 (Change since 1990: +43.4%)
- Latitude & Longitude: 38°35'42" N, 90°32'46" W
- Barretts (Unincorporated)
- Latitude & Longitude: 38°34'18" N, 90°27'36" W
- USGS Quad: Kirkwood
- Bel-Nor (Village)
- Population: 1,598 (Change since 1990: -45.6%)
- Latitude & Longitude: 38°42'07" N, 90°18'60" W
- Bel-Ridge (Village)
- Population: 3,082 (Change since 1990: -10.3%)
- Latitude & Longitude: 38°42'34" N, 90°19'31" W
- Bella Villa (Fourth-class city)
- Population: 687 (2000 census)
- Latitude & Longitude: 38°32'28" N, 90°16'48" W
- Bellefontaine (Unincorporated)
- Latitude & Longitude: 38°39'25" N, 90°33'16" W
- USGS Quad: Chesterfield
- Bellefontaine Neighbors (Fourth-class city)
- Population: 11,271 (Change since 1990: +3.2%)
- Latitude & Longitude: 38°44'25" N, 90°13'35" W
- Bellerive (Village)
- Population: 254 (Change since 1990: +6.7%)
- Latitude & Longitude: 38°42'41" N, 90°18'50" W
- Benbush (Unincorporated)
- Latitude & Longitude: 38°41'27" N, 90°29'42" W
- USGS Quad: Creve Coeur
- Berdell Hills (Unincorporated)
- Latitude & Longitude: 38°43'05" N, 90°17'30" W
- USGS Quad: Clayton
- Berkeley (Home rule city)
- Population: 10,063 (Change since 1990: -19.2%)
- Latitude & Longitude: 38°45'16" N, 90°19'52" W
- Beverly Hills (Fourth-class city)
- Population: 603 (Change since 1990: -8.6%)
- Latitude & Longitude: 38°42'00" N, 90°17'32" W
- Black Jack (Third-class city)
- Population: 6,792 (Change since 1990: +10.8%)
- Latitude & Longitude: 38°47'36" N, 90°16'02" W
- Bonfils (Unincorporated)
- Latitude & Longitude: 38°46'09" N, 90°26'24" W
- USGS Quad: Saint Charles
- Breckenridge Hills (Third-class city)
- Population: 4,817 (Change since 1990: -10.9%)
- Latitude & Longitude: 38°42'52" N, 90°22'02" W
- Brentwood (Fourth-class city)
- Population: 7,693 (Change since 1990: -5.6%)
- Latitude & Longitude: 38°37'03" N, 90°20'57" W
- Bridgeton (Home rule city)
- Population: 15,550 (Change since 1990: -12.5%)
- Latitude & Longitude: 38°46'01" N, 90°24'41" W
- Bridgeton Terrace (Unincorporated)
- Latitude & Longitude: 38°44'47" N, 90°23'11" W
- USGS Quad: Creve Coeur
- Calverton Park (Village)
- Population: 1,322 (Change since 1990: -5.8%)
- Latitude & Longitude: 38°45'53" N, 90°18'49" W
- Castlewood (Unincorporated)
- Latitude & Longitude: 38°32'60" N, 90°33'13" W
- USGS Quad: Manchester
- Cedar Bluff (Unincorporated)
- Latitude & Longitude: 38°32'28" N, 90°34'17" W
- Elevation: 437
- USGS Quad: Manchester
- Centaur (Unincorporated)
- Latitude & Longitude: 38°38'40" N, 90°41'56" W
- Elevation: 464
- USGS Quad: Weldon Spring
- Champ (Village)
- Population: 12 (Change since 1990: +9.1%)
- Latitude & Longitude: 38°44'29" N, 90°26'42" W
- Charlack (Fourth-class city)
- Population: 1,431 (Change since 1990: +3.1%)
- Latitude & Longitude: 38°42'09" N, 90°20'36" W
- Chesterfield (Third-class city)
- Population: 46,802 (Change since 1990: +23.2%)
- Latitude & Longitude: 38°39'47" N, 90°34'37" W
- Post office: Jan. 31, 1895 - Now
- Clarkson Valley (Fourth-class city)
- Population: 2,675 (Change since 1990: +6.7%)
- Latitude & Longitude: 38°37'06" N, 90°35'21" W
- Clayton (Home rule city)
- Population: 12,825 (Change since 1990: -7.6%)
- Latitude & Longitude: 38°38'33" N, 90°19'25" W
- Cliff Cave (Unincorporated)
- Latitude & Longitude: 38°27'42" N, 90°17'15" W
- Elevation: 420
- USGS Quad: Oakville
- Concord (Unincorporated)
- Population: 16,689 (2000 census)
- Located near the junction of Lindbergh Blvd. and MO 21
- Latitude & Longitude: 38°31'28" N, 90°21'26" W
- USGS Quad: Webster Groves
- Cool Valley (Fourth-class city)
- Population: 1,081 (Change since 1990: -23.2%)
- Latitude & Longitude: 38°43'40" N, 90°18'36" W
- Country Club Hills (Fourth-class city)
- Population: 1,381 (Change since 1990: +4.9%)
- Latitude & Longitude: 38°43'15" N, 90°16'29" W
- Country Life Acres (Village)
- Population: 81 (Change since 1990: -19.8%)
- Latitude & Longitude: 38°37'26" N, 90°27'22" W
- Crescent (Unincorporated)
- Latitude & Longitude: 38°31'16" N, 90°36'22" W
- USGS Quad: Manchester
- Crestwood (Home rule city)
- Population: 11,863 (Change since 1990: +5.6%)
- Latitude & Longitude: 38°33'25" N, 90°22'54" W
- Creve Coeur (Home rule city)
- Population: 16,500 (Change since 1990: +34.1%)
- Latitude & Longitude: 38°39'39" N, 90°25'21" W
- Cross Keys (Unincorporated)
- Latitude & Longitude: 38°48'32" N, 90°17'55" W
- USGS Quad: Florissant
- Crystal Lake Park (Fourth-class city)
- Population: 457 (Change since 1990: -9.7%)
- Latitude & Longitude: 38°37'20" N, 90°26'03" W
- Dellwood (Fourth-class city)
- Population: 5,255 (Change since 1990: +0.2%)
- Latitude & Longitude: 38°44'58" N, 90°17'08" W
- Des Peres (Fourth-class city)
- Population: 8,592 (Change since 1990: +2.3%)
- Latitude & Longitude: 38°36'03" N, 90°25'58" W
- Earth City (Unincorporated)
- Latitude & Longitude: 38°46'08" N, 90°28'05" W
- Survey: T. 46 N., R. 6 E., Sec. 5
- Elevation: 440
- USGS Quad: Saint Charles
- Edmundson (Fourth-class city)
- Population: 840 (Change since 1990: -24.4%)
- Latitude & Longitude: 38°44'09" N, 90°21'50" W
- Ellisville (Charter city)
- Population: 9,104 (Change since 1990: +20.7%)
- Located near the junction of MO 100 and MO 340 south of Chesterfield
- Latitude & Longitude: 38°35'33" N, 90°35'13" W
- Eureka (Fourth-class city)
- Population: 7,676 (Change since 1990: +63.9%)
- Latitude & Longitude: 38°30'09" N, 90°37'40" W
- Fenton (Fourth-class city)
- Population: 4,360 (Change since 1990: +30.3%)
- Located near the MO 30 crossing of Meramec River near the Jefferson County line
- Latitude & Longitude: 38°30'47" N, 90°26'09" W
- Post office: Jul. 26, 1833 - Now
- Ferguson (Home rule city)
- Population: 22,406 (Change since 1990: +0.5%)
- Latitude & Longitude: 38°44'39" N, 90°18'19" W
- Fern Glen (Unincorporated)
- Latitude & Longitude: 38°33'07" N, 90°31'53" W
- USGS Quad: Manchester
- Fernridge (Unincorporated)
- Latitude & Longitude: 38°40'51" N, 90°28'39" W
- Elevation: 543
- USGS Quad: Creve Coeur
- Flordell Hills (Fourth-class city)
- Population: 931 (Change since 1990: -2.0%)
- Latitude & Longitude: 38°43'03" N, 90°15'56" W
- Florissant (Home rule city)
- Population: 50,497 (Change since 1990: -1.4%)
- Latitude & Longitude: 38°47'21" N, 90°19'21" W
- Fort Bellefontaine (Unincorporated)
- Latitude & Longitude: 38°50'10" N, 90°14'31" W
- USGS Quad: Columbia Bottom
- Fox Creek (Unincorporated)
- Latitude & Longitude: 38°34'16" N, 90°41'20" W
- Elevation: 768
- USGS Quad: Eureka
- Frontenac (Fourth-class city)
- Population: 3,483 (Change since 1990: +3.2%)
- Latitude & Longitude: 38°38'08" N, 90°24'54" W
- Glasgow Village (Unincorporated)
- Population: 5,234 (2000 census)
- Latitude & Longitude: 38°45'13" N, 90°11'54" W
- USGS Quad: Columbia Bottom
- Glen Echo Park (Village)
- Population: 166 (Change since 1990: -45.4%)
- Latitude & Longitude: 38°42'04" N, 90°17'52" W
- Glencoe (Unincorporated)
- Latitude & Longitude: 38°32'40" N, 90°37'25" W
- Elevation: 453
- USGS Quad: Manchester
- Glendale (Fourth-class city)
- Population: 5,767 (Change since 1990: -3.0%)
- Latitude & Longitude: 38°35'45" N, 90°22'37" W
- Goodfellow Terrace (Unincorporated)
- Latitude & Longitude: 38°41'50" N, 90°16'14" W
- USGS Quad: Clayton
- Grantwood (Village)
- Population: 883 (Change since 1990: -2.3%)
- Latitude & Longitude: 38°33'01" N, 90°21'16" W
- Green Park (Fourth-class city)
- Population: 2,666 (Change since 1990: +14.0%)
- Latitude & Longitude: 38°31'25" N, 90°20'18" W
- Greendale (Fourth-class city)
- Population: 722 (Change since 1990: +69.5%)
- Latitude & Longitude: 38°41'43" N, 90°18'47" W
- Grover (Unincorporated)
- Latitude & Longitude: 38°34'34" N, 90°38'14" W
- Elevation: 794
- USGS Quad: Eureka
- Gumbo (Unincorporated)
- Latitude & Longitude: 38°40'05" N, 90°37'04" W
- USGS Quad: Chesterfield
- Hanley Hills (Village)
- Population: 2,124 (Change since 1990: -8.6%)
- Latitude & Longitude: 38°41'09" N, 90°19'25" W
- Hazelwood (Home rule city)
- Population: 26,206 (Change since 1990: +68.9%)
- Latitude & Longitude: 38°46'17" N, 90°22'15" W
- Hillsdale (Village)
- Population: 1,477 (Change since 1990: -24.2%)
- Latitude & Longitude: 38°40'60" N, 90°17'02" W
- Hine (Unincorporated)
- Latitude & Longitude: 38°40'59" N, 90°31'24" W
- USGS Quad: Chesterfield
- Hollow (Unincorporated)
- Latitude & Longitude: 38°32'60" N, 90°42'29" W
- USGS Quad: Eureka
- Huntleigh (Fourth-class city)
- Population: 323 (Change since 1990: -17.6%)
- Latitude & Longitude: 38°36'57" N, 90°24'38" W
- Ivory (Unincorporated)
- Latitude & Longitude: 38°31'36" N, 90°16'37" W
- USGS Quad: Webster Groves
- Jedburgh (Unincorporated)
- Latitude & Longitude: 38°32'17" N, 90°34'55" W
- USGS Quad: Manchester
- Jefferson Barracks (Unincorporated)
- Latitude & Longitude: 38°30'10" N, 90°16'49" W
- Elevation: 485
- USGS Quad: Webster Groves
- Jennings (Third-class city)
- Population: 15,469 (Change since 1990: -2.7%)
- Latitude & Longitude: 38°43'09" N, 90°15'37" W
- Keyes Summit (Unincorporated)
- Latitude & Longitude: 38°34'02" N, 90°27'46" W
- USGS Quad: Kirkwood
- Kinloch (Fourth-class city)
- Population: 449 (Change since 1990: -83.4%)
- Latitude & Longitude: 38°44'26" N, 90°19'31" W
- Kirkwood (Home rule city)
- Population: 27,324 (Change since 1990: +0.1%)
- Latitude & Longitude: 38°34'60" N, 90°24'24" W
- Koch (Historical)
- Latitude & Longitude: 38°28'54" N, 90°17'08" W
- Survey: T. 43 N., R. 7 E., Sec. 7
- USGS Quad: Oakville
- Post office: Nov. 15, 1893 - Oct. 13, 1972
- La Charbonniere (Unincorporated)
- Latitude & Longitude: 38°49'60" N, 90°20'60" W
- Elevation: 530
- USGS Quad: Florissant
- Ladue (Fourth-class city)
- Population: 8,645 (Change since 1990: -2.3%)
- Latitude & Longitude: 38°38'59" N, 90°22'50" W
- Lake (Unincorporated)
- Latitude & Longitude: 38°40'46" N, 90°31'12" W
- USGS Quad: Chesterfield
- Lake Junction (Unincorporated)
- Latitude & Longitude: 38°36'20" N, 90°19'58" W
- USGS Quad: Webster Groves
- Lakeshire (Fourth-class city)
- Population: 1,375 (Change since 1990: -6.3%)
- Latitude & Longitude: 38°32'19" N, 90°20'06" W
- Larimore (Unincorporated)
- Latitude & Longitude: 38°46'24" N, 90°12'25" W
- USGS Quad: Columbia Bottom
- Lemay (Unincorporated)
- Population: 17,215 (2000 census)
- Latitude & Longitude: 38°31'60" N, 90°16'45" W
- USGS Quad: Webster Groves
- Lincoln Beach (Unincorporated)
- Latitude & Longitude: 38°32'47" N, 90°32'22" W
- USGS Quad: Manchester
- Loehr (Unincorporated)
- Latitude & Longitude: 38°36'54" N, 90°32'28" W
- USGS Quad: Manchester
- Mackenzie (Village)
- Population: 137 (Change since 1990: -7.4%)
- Latitude & Longitude: 38°34'45" N, 90°19'01" W
- Manchester (Fourth-class city)
- Population: 19,161 (Change since 1990: +192.9%)
- Latitude & Longitude: 38°35'49" N, 90°30'33" W
- Maplewood (Home rule city)
- Population: 9,228 (Change since 1990: -7.4%)
- Latitude & Longitude: 38°36'45" N, 90°19'28" W
- Marlborough (Village)
- Population: 2,235 (Change since 1990: +14.7%)
- Latitude & Longitude: 38°34'13" N, 90°20'13" W
- Mary Ridge (Unincorporated)
- Latitude & Longitude: 38°43'15" N, 90°22'25" W
- USGS Quad: Clayton
- Maryland Heights (Third-class city)
- Population: 25,756 (Change since 1990: +1.4%)
- Latitude & Longitude: 38°42'47" N, 90°25'47" W
- Mattese (Unincorporated)
- Latitude & Longitude: 38°29'08" N, 90°20'55" W
- USGS Quad: Oakville
- Meacham Park (Unincorporated)
- Latitude & Longitude: 38°33'45" N, 90°24'08" W
- USGS Quad: Kirkwood
- Mehlville (Unincorporated)
- Population: 28,822 (2000 census)
- Latitude & Longitude: 38°30'30" N, 90°19'22" W
- Elevation: 638
- USGS Quad: Webster Groves
- Melrose (Unincorporated)
- Latitude & Longitude: 38°34'22" N, 90°43'23" W
- Elevation: 776
- USGS Quad: Eureka
- Minke (Historical)
- Latitude & Longitude: 38°32'19" N, 90°33'38" W
- Survey: T. 44 N., R. 4 E., Sec. 22
- USGS Quad: Manchester
- Moline Acres (Fourth-class city)
- Population: 2,662 (Change since 1990: -1.8%)
- Latitude & Longitude: 38°44'49" N, 90°14'24" W
- Monarch (Unincorporated)
- Latitude & Longitude: 38°38'36" N, 90°40'17" W
- USGS Quad: Weldon Spring
- Morschels (Unincorporated)
- Latitude & Longitude: 38°32'22" N, 90°32'09" W
- USGS Quad: Manchester
- Mountain Ridge (Unincorporated)
- Latitude & Longitude: 38°32'60" N, 90°32'27" W
- USGS Quad: Manchester
- Musicks Ferry (Unincorporated)
- Latitude & Longitude: 38°51'41" N, 90°20'18" W
- USGS Quad: Florissant
- Natural Bridge Junction (Unincorporated)
- Latitude & Longitude: 38°45'27" N, 90°25'59" W
- USGS Quad: Saint Charles
- Normandy (Third-class city)
- Population: 5,153 (Change since 1990: +15.0%)
- Latitude & Longitude: 38°43'15" N, 90°17'50" W
- Northwoods (Fourth-class city)
- Population: 4,643 (Change since 1990: -9.1%)
- Latitude & Longitude: 38°42'15" N, 90°16'60" W
- Norwood Court (Village)
- Population: 1,061 (Change since 1990: +19.5%)
- Latitude & Longitude: 38°43'06" N, 90°17'32" W
- Oakland (Fourth-class city)
- Population: 1,540 (Change since 1990: -3.3%)
- Latitude & Longitude: 38°34'35" N, 90°23'08" W
- Oakville (Unincorporated)
- Population: 35,309 (2000 census)
- Located along MO 231 south of the interchange with I-255
- Latitude & Longitude: 38°28'12" N, 90°18'16" W
- Elevation: 605
- USGS Quad: Oakville
- Olivette (Home rule city)
- Population: 7,438 (Change since 1990: -1.8%)
- Latitude & Longitude: 38°39'55" N, 90°22'33" W
- Orrville (Unincorporated)
- Latitude & Longitude: 38°38'13" N, 90°39'36" W
- USGS Quad: Weldon Spring
- Osage Hills (Unincorporated)
- Latitude & Longitude: 38°34'06" N, 90°26'52" W
- USGS Quad: Kirkwood
- Overland (Fourth-class city)
- Population: 16,838 (Change since 1990: -6.4%)
- Latitude & Longitude: 38°42'04" N, 90°21'44" W
- Ozark View (Unincorporated)
- Latitude & Longitude: 38°34'35" N, 90°27'45" W
- USGS Quad: Kirkwood
- Pagedale (Fourth-class city)
- Population: 3,616 (Change since 1990: -4.1%)
- Latitude & Longitude: 38°40'60" N, 90°18'27" W
- Pasadena Hills (Fourth-class city)
- Population: 1,147 (Change since 1990: -1.5%)
- Latitude & Longitude: 38°42'30" N, 90°17'34" W
- Pasadena Park (Village)
- Population: 489 (Change since 1990: -8.1%)
- Latitude & Longitude: 38°42'38" N, 90°17'53" W
- Pattonville (Unincorporated)
- Latitude & Longitude: 38°44'11" N, 90°24'24" W
- USGS Quad: Creve Coeur
- Peerless Park (Unincorporated)
- Peerless Park, formerly a 4th class city, disincorporated
on May 28, 1999
- Population: 33 (1990 census)
- Latitude & Longitude: 38°32'36" N, 90°29'42" W
- USGS Quad: Kirkwood
- Pettys Hill (Unincorporated)
- Latitude & Longitude: 38°32'53" N, 90°30'19" W
- Elevation: 439
- USGS Quad: Manchester
- Pine Lawn (Fourth-class city)
- Population: 4,204 (Change since 1990: -17.4%)
- Latitude & Longitude: 38°41'45" N, 90°16'30" W
- Point (Unincorporated)
- Latitude & Longitude: 38°23'39" N, 90°20'31" W
- USGS Quad: Oakville
- Pond (Unincorporated)
- Latitude & Longitude: 38°34'49" N, 90°39'22" W
- Elevation: 799
- USGS Quad: Eureka
- Prospect Hill (Unincorporated)
- Latitude & Longitude: 38°44'15" N, 90°13'09" W
- USGS Quad: Granite City
- Ranken (Unincorporated)
- Latitude & Longitude: 38°32'05" N, 90°30'43" W
- USGS Quad: Manchester
- Richmond Heights (Home rule city)
- Population: 9,602 (Change since 1990: -8.1%)
- Latitude & Longitude: 38°37'43" N, 90°19'10" W
- Riverview (Village)
- Population: 3,146 (Change since 1990: -3.0%)
- Latitude & Longitude: 38°44'52" N, 90°12'41" W
- Robertson (Unincorporated)
- Latitude & Longitude: 38°45'51" N, 90°22'55" W
- USGS Quad: Saint Charles
- Rock Hill (Fourth-class city)
- Population: 4,765 (Change since 1990: -8.7%)
- Latitude & Longitude: 38°36'27" N, 90°22'42" W
- Sappington (Unincorporated)
- Population: 7,287 (2000 census)
- Latitude & Longitude: 38°32'13" N, 90°22'47" W
- Elevation: 597
- USGS Quad: Kirkwood
- Schuermann Heights (Unincorporated)
- Latitude & Longitude: 38°43'22" N, 90°21'55" W
- USGS Quad: Clayton
- Sherman (Unincorporated)
- Latitude & Longitude: 38°32'16" N, 90°35'31" W
- USGS Quad: Manchester
- Shoveltown (Unincorporated)
- Latitude & Longitude: 38°48'56" N, 90°16'50" W
- USGS Quad: Florissant
- Shrewsbury (Fourth-class city)
- Population: 6,644 (Change since 1990: +3.6%)
- Latitude & Longitude: 38°35'25" N, 90°20'12" W
- Spanish Lake (Unincorporated)
- Population: 21,337 (2000 census)
- Latitude & Longitude: 38°47'16" N, 90°12'57" W
- Elevation: 538
- USGS Quad: Columbia Bottom
- St. Ann (Fourth-class city)
- Population: 13,607 (Change since 1990: -6.1%)
- Latitude & Longitude: 38°43'38" N, 90°22'59" W
- Post office: Jul. 1, 1954 - Now
- St. George (Fourth-class city)
- Population: 1,288 (Change since 1990: +1.4%)
- Latitude & Longitude: 38°32'12" N, 90°18'53" W
- St. John (Home rule city)
- Population: 6,871 (Change since 1990: -8.0%)
- Latitude & Longitude: 38°42'48" N, 90°20'35" W
- Sunset Hills (Fourth-class city)
- Population: 8,267 (Change since 1990: +68.2%)
- Latitude & Longitude: 38°32'20" N, 90°24'26" W
- Sycamore Hills (Village)
- Population: 722 (Change since 1990: +8.2%)
- Latitude & Longitude: 38°42'03" N, 90°20'59" W
- Times Beach (Historical)
- Located just east of Eureka near the I-44 crossing of Meramec River
- Latitude & Longitude: 38°30'31" N, 90°36'09" W
- USGS Quad: Manchester
- Town and Country (Fourth-class city)
- Population: 10,894 (Change since 1990: +14.4%)
- Latitude & Longitude: 38°36'44" N, 90°27'48" W
- Twin Oaks (Village)
- Population: 362 (Change since 1990: -28.5%)
- Latitude & Longitude: 38°33'53" N, 90°29'47" W
- Tyson (Unincorporated)
- Latitude & Longitude: 38°32'13" N, 90°33'42" W
- USGS Quad: Manchester
- University City (Home rule city)
- Population: 37,428 (Change since 1990: -6.6%)
- Latitude & Longitude: 38°39'21" N, 90°18'33" W
- Uplands Park (Village)
- Population: 460 (Change since 1990: -7.8%)
- Latitude & Longitude: 38°41'35" N, 90°16'56" W
- Valley Park (Fourth-class city)
- Population: 6,518 (Change since 1990: +56.5%)
- Latitude & Longitude: 38°32'57" N, 90°29'33" W
- Velda City (Fourth-class city)
- Population: 1,616 (Change since 1990: +1.2%)
- Latitude & Longitude: 38°41'24" N, 90°17'39" W
- Velda Village Hills (Village)
- Population: 1,090 (Change since 1990: -17.1%)
- Latitude & Longitude: 38°41'26" N, 90°17'14" W
- Vigus (Unincorporated)
- Latitude & Longitude: 38°44'08" N, 90°27'53" W
- USGS Quad: Creve Coeur
- Vinita Park (Fourth-class city)
- Population: 1,924 (Change since 1990: -3.8%)
- Latitude & Longitude: 38°41'24" N, 90°20'33" W
- Vinita Terrace (Village)
- Population: 292 (Change since 1990: -13.6%)
- Latitude & Longitude: 38°41'08" N, 90°19'45" W
- Warson Woods (Fourth-class city)
- Population: 1,983 (Change since 1990: -3.2%)
- Latitude & Longitude: 38°36'26" N, 90°22'60" W
- Webster Groves (Home rule city)
- Population: 23,230 (Change since 1990: +1.1%)
- Latitude & Longitude: 38°35'33" N, 90°21'26" W
- Wellston (Third-class city)
- Population: 2,460 (Change since 1990: -31.9%)
- Latitude & Longitude: 38°40'22" N, 90°17'57" W
- Westwood (Village)
- Population: 284 (Change since 1990: -8.1%)
- Latitude & Longitude: 38°38'37" N, 90°26'23" W
- White House (Unincorporated)
- Latitude & Longitude: 38°25'05" N, 90°19'32" W
- Elevation: 412
- USGS Quad: Oakville
- Wilbur Park (Village)
- Population: 475 (Change since 1990: -9.0%)
- Latitude & Longitude: 38°33'11" N, 90°18'34" W
- Wildwood (Third-class city)
- Population: 32,884 (Change since 1990: +96.4%)
- Latitude & Longitude: 38°34'58" N, 90°39'46" W
- Winchester (Fourth-class city)
- Population: 1,651 (Change since 1990: -1.6%)
- Latitude & Longitude: 38°35'25" N, 90°31'40" W
- Windsor Springs (Unincorporated)
- Latitude & Longitude: 38°33'60" N, 90°24'42" W
- USGS Quad: Kirkwood
- Woodhine Heights (Unincorporated)
- Latitude & Longitude: 38°34'10" N, 90°26'02" W
- USGS Quad: Kirkwood
- Woodson Terrace (Fourth-class city)
- Population: 4,189 (Change since 1990: -4.0%)
- Latitude & Longitude: 38°43'30" N, 90°21'30" W
- Woodstock (Unincorporated)
- Latitude & Longitude: 38°43'52" N, 90°17'34" W
- USGS Quad: Clayton
- Yeatman (Unincorporated)
- Latitude & Longitude: 38°32'36" N, 90°36'43" W
- USGS Quad: Manchester
Name origin
Named for the city of St. Louis
| Year | Population | Percent change |
|---|
| 1830 | 14,125 | -- |
| 1840 | 35,979 | +154.7% |
| 1850 | 104,978 | +191.8% |
| 1860 | 190,524 | +81.5% |
| 1870 | 351,189 | +84.3% |
| 1880 | 31,888 | -90.9% |
| 1890 | 36,307 | +13.9% |
| 1900 | 50,040 | +37.8% |
| 1910 | 82,417 | +64.7% |
| 1920 | 100,737 | +22.2% |
| 1930 | 211,593 | +110.0% |
| 1940 | 274,230 | +29.6% |
| 1950 | 406,349 | +48.2% |
| 1960 | 703,532 | +73.1% |
| 1970 | 951,353 | +35.2% |
| 1980 | 973,896 | +2.4% |
| 1990 | 993,529 | +2.0% |
| 2000 | 1,016,315 | +2.3% |