Hammon is a town in the U.S. state of Oklahoma the majority of which is in Roger Mills County, but some of which extends into Custer County. It is located at the junction of Oklahoma State Highway 33 and Oklahoma State Highway 34.
Hammon is located at 35°37′57″N 99°22′53″W / 35.63250°N 99.38139°W / 35.63250; -99.38139 (35.632369, −99.381267). According to the United States Census Bureau, the town has a total area of 0.7 square miles (1.9 km²), all land.
Hammon is located southwest of the intersection of State Highway 33 and State Highway 34 in Southwestern Oklahoma, known for Oklahoma Tourism purposes as Great Plains Country. The town is just west of the Washita National Wildlife Refuge, and just east of the Black Kettle National Grassland.
As of the census of 2000, there were 469 people, 169 households, and 114 families residing in the town. The population density was 637.0 people per square mile (244.7/km²). There were 203 housing units at an average density of 275.7 per square mile (105.9/km²). The racial makeup of the town was 60.77% White, 0.64% African American, 34.54% Native American, 0.21% Asian, 1.71% from other races, and 2.13% from two or more races. Hispanic or Latino of any race were 5.76% of the population.
There were 169 households out of which 33.7% had children under the age of 18 living with them, 47.3% were married couples living together, 16.6% had a female householder with no husband present, and 32.0% were non-families. 29.0% of all households were made up of individuals and 13.6% had someone living alone who was 65 years of age or older. The average household size was 2.78 and the average family size was 3.49.
In the town, the population was spread out with 29.9% under the age of 18, 10.0% from 18 to 24, 28.6% from 25 to 44, 21.3% from 45 to 64, and 10.2% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 108.4 males. For every 100 females age 18 and over, there were 101.8 males.
The median income for a household in the town was $22,604, and the median income for a family was $28,036. Males had a median income of $22,250 versus $20,500 for females. The per capita income for the town was $10,184. About 31.5% of families and 34.8% of the population were below the poverty line, including 44.8% of those under age 18 and 19.5% of those age 65 or over.