Dayville
- County:
- Grant County
- County Seat:
- No
- Area (mi²):
- 0.526
- State:
- Oregon
Dayville is a town located in Grant County, Oregon. Dayville has a 2026 population of 130. Dayville is currently declining at a rate of -0.76% annually and its population has decreased by -1.52% since the most recent census, which recorded a population of 132 in 2020.
The median household income in Dayville is $54,271 with a poverty rate of 9.22%. The median age in Dayville is 50.3 years: 50.2 years for males, and 53 years for females. For every 100 females there are 114.6 males.