Center for Spatial Analysis
- Specializing in the study and application of geospatial science and technology. Includes information about research and development, data, products and tools.
- http://www.csa.ou.edu/

Counties and Regions
- Map displaying counties and regions as used in the Oklahoma category of the Open Directory Project.
- http://member.newsguy.com/~sanford/okregion.html

Oklahoma County Courthouses
- Photographs and locations of many county courthouses throughout the state, as well as population and other information.
- http://www.barnfield.net/oklahoma/

Oklahoma Maps
- The Perry-Castañeda Library Map Collection.
- http://www.lib.utexas.edu/maps/oklahoma.html