|• Total||6.2 sq mi (16.1 km2)|
|• Land||6.2 sq mi (16.1 km2)|
|• Water||0.0 sq mi (0.0 km2)|
|Elevation||1,106 ft (337 m)|
|• Density||35.3/sq mi (13.6/km2)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|GNIS feature ID||1100569|
Leach's post office was established January 20, 1897, in District 5 of the old Indian Territory with John R. Leach as the postmaster.
Leach is located at .(36.197845, -94.913359)
According to the United States Census Bureau, the CDP has a total area of 6.2 square miles (16 km2), all of it land.
As of the census of 2000, there were 220 people, 81 households, and 66 families residing in the CDP. The population density was 35.3 people per square mile (13.6/km²). There were 94 housing units at an average density of 15.1/sq mi (5.8/km²). The racial makeup of the CDP was 48.64% White, 40.45% Native American, and 10.91% from two or more races. Hispanic or Latino of any race were 1.36% of the population.
There were 81 households out of which 38.3% had children under the age of 18 living with them, 67.9% were married couples living together, 9.9% had a female householder with no husband present, and 17.3% were non-families. 16.0% of all households were made up of individuals and 3.7% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 2.99.
In the CDP the population was spread out with 28.6% under the age of 18, 8.2% from 18 to 24, 26.4% from 25 to 44, 26.4% from 45 to 64, and 10.5% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 103.7 males. For every 100 females age 18 and over, there were 109.3 males.
The median income for a household in the CDP was $30,972, and the median income for a family was $31,964. Males had a median income of $23,646 versus $24,375 for females. The per capita income for the CDP was $11,119. About 17.3% of families and 18.3% of the population were below the poverty line, including 16.9% of those under the age of eighteen and 30.0% of those sixty five or over.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- Foreman, Grant. "Early Post Offices of Oklahoma". Chronicles of Oklahoma 6:3 (September 1928) 271-298. (accessed March 8, 2007)
- Shirk, George H. Oklahoma Place Names. Norman: University of Oklahoma Press, 1987. ISBN 0-8061-2028-2.