The Political Graveyard: Pittsburg County, Oklahoma
- Database provides political history, cemetery locations, and brief biographies of politicians who were born, lived or died in the county.
- http://politicalgraveyard.com/geo/OK/PI.html#CEM

Pittsburg County Demographics
- Provides report from the U.S. Bureau of the Census, Census 2000. [PDF file]
- http://staging.okcommerce.gov/test1/dmdocuments/Pittsburg_County_Demographics_061004340.pdf

First Realty, Inc.
- Offering services from buying and selling to building or financing, with offices in McAlester and Longtown. Residential and commercial.
- http://mcalester-realestate.com/

Pittsburg County Extension
- Part of the Oklahoma Cooperative Extension Service and the Division of Agricultural Sciences and Natural Resources at Oklahoma State University, to provide research-based information and education to help Oklahomans make their lives better.
- http://www.osu-ext.pittsburg.ok.us/