
Dennis
- County:
- Delaware County
- County Seat:
- No
- Area (mi²):
- 4.527
- State:
- Oklahoma
Dennis is a CDP located in Delaware County, Oklahoma. Dennis has a 2025 population of 219. Dennis is currently growing at a rate of 0.92% annually and its population has increased by 140.66% since the most recent census, which recorded a population of 91 in 2020.
The average household income in Dennis is $101,594 with a poverty rate of 15.53%. The median age in Dennis is 62 years: 61.3 years for males, and 64.8 years for females.