
Madill
- County:
- Marshall County
- County Seat:
- Yes
- Area (mi²):
- 4.417
- State:
- Oklahoma
Madill is a city located in Marshall County, Oklahoma. Madill has a 2025 population of 4,109. It is also the county seat of Marshall County. Madill is currently growing at a rate of 1.01% annually and its population has increased by 5.2% since the most recent census, which recorded a population of 3,906 in 2020.
The average household income in Madill is $57,500 with a poverty rate of 21.51%. The median age in Madill is 32.9 years: 27.9 years for males, and 36.2 years for females.