- Location: Perry County, Missouri
- Legal status: Village
- Population: 76 (Change since 1990: -29.0%)
- Founded: 1819
- Name origin: John Long
- Previously known as: Abernethy
- Located on US 61 between Uniontown and Perryville
- Latitude: 37°40'12" N (+37.6699)
- Longitude: 89°46'25" W (-89.7736)
- Civil township: Union
- Land area: 0.13 square miles (81.7 acres)
As the crow flies, Longtown is...
Name origin
Named for John Long, Sr.
Previous names
The post office switched from Abernethy to Longtown in 1873.
| Year | Population | Percent change |
|---|
| 1900 | 108 | -- |
| 1910 | 158 | +46.3% |
| 1920 | 162 | +2.5% |
| 1930 | 150 | -7.4% |
| 1940 | 138 | -8.0% |
| 1950 | 139 | +0.7% |
| 1960 | 113 | -18.7% |
| 1970 | 113 | None |
| 1980 | 121 | +7.1% |
| 1990 | 107 | -11.6% |
| 2000 | 76 | -29.0% |