- Location: Bollinger County, Missouri
- Legal status: Village
- Population: 93 (Change since 1990: +12.0%)
- Name origin: Zalma Block
- Previously known as: Bollinger's Mills
- Located on MO 51 just west of Route H intersection along Castor River
- Latitude: 37°08'40" N (+37.1445)
- Longitude: 90°04'41" W (-90.0781)
- Civil township: Wayne
- Land area: 0.14 square miles (92.2 acres)
As the crow flies, Zalma is...
Name origin
Named after Zalma Block, a friend of railroad builder Louis Houck
| Year | Population | Percent change |
|---|
| 1910 | 197 | -- |
| 1920 | 259 | +31.5% |
| 1930 | 204 | -21.2% |
| 1940 | 169 | -17.2% |
| 1950 | 137 | -18.9% |
| 1960 | 141 | +2.9% |
| 1970 | 118 | -16.3% |
| 1980 | 121 | +2.5% |
| 1990 | 83 | -31.4% |
| 2000 | 93 | +12.0% |