Jennings is a town in Pawnee County, Oklahoma, United States. The population was 363 at the 2010 census, a 2.7 percent decline from the figure of 373 recorded in 2000.
Jennings is located at 36°10′50″N 96°34′11″W (36.180666, -96.569623). According to the United States Census Bureau, the town has a total area of 0.6 square miles (1.6 km2), all land.
As of the census of 2000, there were 373 people, 140 households, and 102 families residing in the town. The population density was 671.6 people per square mile (257.2/km2). There were 173 housing units at an average density of 311.5 per square mile (119.3/km2). The racial makeup of the town was 84.72% White, 11.80% Native American, 0.27% Pacific Islander, and 3.22% from two or more races. Hispanic or Latino of any race were 0.27% of the population.
There were 140 households, out of which 33.6% had children under the age of 18 living with them, 59.3% were married couples living together, 8.6% had a female householder with no husband present, and 27.1% were non-families. 25.7% of all households were made up of individuals, and 11.4% had someone living alone who was 65 years of age or older.