| Official Name: | Foster, Oklahoma |
| Settlement Type: | Town |
| Pushpin Map: | Oklahoma#USA |
| Pushpin Label: | Foster |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Oklahoma |
| Subdivision Type2: | County |
| Subdivision Name2: | Garvin |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 89.69 |
| Area Land Km2: | 89.25 |
| Area Water Km2: | 0.44 |
| Area Total Sq Mi: | 34.63 |
| Area Land Sq Mi: | 34.46 |
| Area Water Sq Mi: | 0.17 |
| Population As Of: | 2020 |
| Population Total: | 246 |
| Population Density Km2: | 2.76 |
| Population Density Sq Mi: | 7.14 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 997 |
| Coordinates: | 34.63°N -97.5247°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 73039 (historically), 73434 (today) |
| Area Code: | 580 |
| Blank Name: | FIPS code |
| Blank Info: | 40-27500 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2412646 |
Foster is a town in Garvin County, Oklahoma, United States. It was incorporated in 2002[2] and had a population of 161 at the 2010 census.[3]
Foster is served by State Highway 29A, a spur of State Highway 29. A post office was first established at Foster on August 12, 1891.[4]
Foster is located in southwestern Garvin County. State Highway 29 follows the northern border of the town, leading east 5miles to Elmore City and west to Bray. State Highway 76 passes through the western part of the town, leading north to Lindsay and south to Ratliff City. Wynnewood is east of Foster via State Highway 29, and Pauls Valley, the Garvin County seat, is to the northeast via Highway 29 and Airline Road.
According to the U.S. Census Bureau, the town of Foster has a total area of 41.5sqkm, of which 41.3sqkm are land and 0.2sqkm, or 0.52%, is water.[3]