Hillsdale
- County:
- Garfield County
- County Seat:
- No
- Area (mi²):
- 0.347
- State:
- Oklahoma
Hillsdale is a town located in Garfield County, Oklahoma. Hillsdale has a 2026 population of 73. Hillsdale is currently declining at a rate of 0% annually and its population has decreased by -1.35% since the most recent census, which recorded a population of 74 in 2020.
The median household income in Hillsdale is $45,313 with a poverty rate of 8.99%. The median age in Hillsdale is 51.2 years: 48.3 years for males, and 55.5 years for females. For every 100 females there are 147.2 males.