- Location: Pulaski County, Illinois
- Legal status: Village
- Population: 299 (Change since 1990: -16.5%)
- Founded: Sept. 9, 1872
- Previously known as: Caledonia and North Caledonia
- Alternate name: Olmstead
- Located northeast of Mound City
- Latitude: 37°10'50" N (+37.1806)
- Longitude: 89°05'20" W (-89.0889)
- Elevation: 370 feet above sea level
- Public Land Survey: T. 15 S., R. 1 E., Sec. 22, 27
- Precinct: Olmsted
- Land area: 1.7 square miles
- Water area: 0.04 square miles (28.5 acres)
As the crow flies, Olmsted is...
| Year | Population | Percent change |
|---|
| 1990 | 358 | -- |
| 2000 | 299 | -16.5% |