Texas and Oklahoma county investor resources
County pages for the 12 largest Texas counties and 8 largest Oklahoma counties by 2025 Census Bureau population estimate. Each page links the official county, appraisal or assessor, and tax offices and summarizes how foreclosure and tax sales work under state law, with sources and the date we last checked them.
Texas
Harris County
Seat: Houston · Pop. 5,045,026 (2025 est.)
Dallas County
Seat: Dallas · Pop. 2,661,397 (2025 est.)
Tarrant County
Seat: Fort Worth · Pop. 2,248,466 (2025 est.)
Bexar County
Seat: San Antonio · Pop. 2,160,088 (2025 est.)
Travis County
Seat: Austin · Pop. 1,389,670 (2025 est.)
Collin County
Seat: McKinney · Pop. 1,297,179 (2025 est.)
Denton County
Seat: Denton · Pop. 1,069,346 (2025 est.)
Fort Bend County
Seat: Richmond · Pop. 975,191 (2025 est.)
Hidalgo County
Seat: Edinburg · Pop. 921,549 (2025 est.)
El Paso County
Seat: El Paso · Pop. 877,858 (2025 est.)
Montgomery County
Seat: Conroe · Pop. 781,194 (2025 est.)
Williamson County
Seat: Georgetown · Pop. 752,827 (2025 est.)
Oklahoma
Oklahoma County
Seat: Oklahoma City · Pop. 822,125 (2025 est.)
Tulsa County
Seat: Tulsa · Pop. 698,782 (2025 est.)
Cleveland County
Seat: Norman · Pop. 303,973 (2025 est.)
Canadian County
Seat: El Reno · Pop. 187,189 (2025 est.)
Comanche County
Seat: Lawton · Pop. 122,158 (2025 est.)
Rogers County
Seat: Claremore · Pop. 102,197 (2025 est.)
Wagoner County
Seat: Wagoner · Pop. 93,263 (2025 est.)
Payne County
Seat: Stillwater · Pop. 83,889 (2025 est.)