Fannin County, Texas

Fannin County, Texas
Location within the U.S. state of Texas
Coordinates: 33°35′N 96°07′W / 33.59°N 96.11°W / 33.59; -96.11
Country United States
State Texas
Founded1838
Named afterJames Fannin
SeatBonham
Largest cityBonham
Area
 • Total
899 sq mi (2,330 km2)
 • Land891 sq mi (2,310 km2)
 • Water8.0 sq mi (21 km2)  0.9%
Population
 (2020)
 • Total
35,662
 • Estimate 
(2024)
38,650
 • Density40.0/sq mi (15.5/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district4th
Websitewww.co.fannin.tx.us

Fannin County is a county in the U.S. state of Texas, on the border with Oklahoma. Fannin is located at the western edge of Northeast Texas.

As of the 2020 census, its population was 35,662, making it the 87th-most populous county in Texas. The entirety of Fannin County is a part of the Bonham micropolitan statistical area and the Dallas-Fort Worth combined statistical area. The county seat is Bonham.