- Located at the intersection of MO 114 and Route FF between Dexter and Grayridge
- Latitude: 36°48'43" N (+36.8120)
- Longitude: 89°51'45" W (-89.8625)
- Elevation: 300 feet above sea level
- Civil township: Richland
- Land area: 0.28 square miles (176.1 acres)
As the crow flies, Essex is...
| Year | Population | Percent change |
|---|
| 1900 | 163 | -- |
| 1910 | 548 | +236.2% |
| 1920 | 589 | +7.5% |
| 1930 | 578 | -1.9% |
| 1940 | 639 | +10.6% |
| 1950 | 549 | -14.1% |
| 1960 | 511 | -6.9% |
| 1970 | 493 | -3.5% |
| 1980 | 545 | +10.5% |
| 1990 | 531 | -2.6% |
| 2000 | 524 | -1.3% |