- Location: Scott County, Missouri
- Legal status: Village
- Population: 163 (Change since 1990: +12.4%)
- Founded: June 15, 1870 by John Kirkpatrick
- Name origin: Henry Diehl
- Located on MO 77 north of US 62
- Latitude: 36°57'32" N (+36.9589)
- Longitude: 89°25'53" W (-89.4314)
- Civil township: Tywappity
- Land area: 0.08 square miles (48.5 acres)
As the crow flies, Diehlstadt is...
Name origin
Named for Henry Diehl, friend of town founder John Kirkpatrick
| Year | Population | Percent change |
|---|
| 1900 | 156 | -- |
| 1910 | 160 | +2.6% |
| 1920 | 196 | +22.5% |
| 1930 | 163 | -16.8% |
| 1940 | 159 | -2.5% |
| 1950 | 165 | +3.8% |
| 1960 | 141 | -14.5% |
| 1970 | 155 | +9.9% |
| 1980 | 170 | +9.7% |
| 1990 | 145 | -14.7% |
| 2000 | 163 | +12.4% |