Fannin County is a county in the far northeast of the U.S. state of Texas, on the border with Oklahoma. As of the 2020 census, its population was 35,662.^[1] The county seat is Bonham.^[2]

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Fannin County
County
Fannin County Courthouse in Bonham
Location within the U.S. state of Texas
Texas's location within the U.S.
Coordinates: 33°35′N 96°07′W
Country	United States
State	Texas
Founded	1838
Named for	James Fannin
Seat	Bonham
Largest city	Bonham
Area
• Total	899 sq mi (2,330 km2)
• Land	891 sq mi (2,310 km2)
• Water	8.0 sq mi (21 km2)  0.9%
Population  (2020)
• Total	35,662
• Density	40/sq mi (15/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	4th
Website	www.co.fannin.tx.us

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The county was named for James Fannin,^[3] who commanded the group of Texans killed in the Goliad Massacre during the Texas Revolution. James Bonham (the county seat's namesake) sought Fannin's assistance for the Battle of the Alamo, but Fannin was unable to provide it.

The county was created in 1837 and organized the next year.^[4][5] Fannin County is a part of the Texoma region.

According to the U.S. Census Bureau, the county has a total area of 899 square miles (2,330 km²), of which 891 square miles (2,310 km²) are land and 8.0 square miles (21 km²) (0.9%) are covered by water.^[6] It is drained by Bois D'Arc Creek and Sulphur River.^[7]

Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.

As of the census^[14] of 2000, 31,242 people, 11,105 households, and 7,984 were families residing in the county. The population density was 35 people per square mile (14 people/km²). The 12,887 housing units averaged 14 units per square mile (5.4/km²). The racial makeup of the county was 86.56% White, 7.96% African American, 0.92% Native American, 0.26% Asian, 2.81% from other races, and 1.49% from two or more races. About 5.61% of the population was Hispanic or Latino of any race. As of 2015, the largest self-reported ancestry groups were 48.50% English, 16.10% Welsh, 11.00% German, and 7.25% Irish.

Of the 11,105 households, 31.10% had children under the age of 18 living with them, 57.90% were married couples living together, 10.30% had a female householder with no husband present, and 28.10% were not families. About 25.20% of all households were made up of individuals, and 12.70% had someone living alone who was 65 years of age or older. The average household size was 2.51, and the average family size was 2.99.

In the county, the population was distributed as 23.20% under the age of 18, 8.90% from 18 to 24, 28.60% from 25 to 44, 23.20% from 45 to 64, and 16.10% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 113.80 males. For every 100 females age 18 and over, there were 116.90 males.

The median income for a household in the county was $34,501, and for a family was $42,193. Males had a median income of $31,140 versus $23,101 for females. The per capita income for the county was $16,066. About 9.90% of families and 13.90% of the population were below the poverty line, including 17.70% of those under age 18 and 16.50% of those age 65 or over.

These school districts serve Fannin County:

• Bonham ISD
• Dodd City ISD
• Ector ISD
• Fannindel ISD
• Honey Grove ISD
• Leonard ISD
• Sam Rayburn ISD
• Savoy ISD
• Trenton ISD (mostly Fannin County, small part in Grayson County)
• Whitewright ISD (mostly in Grayson County, small portion in Fannin County)

Additionally, nearby Grayson College, Paris Junior College, and Texas A&M University–Commerce provide post-secondary education in the area.

Once a Democratic stronghold for decades (in large part as it was the home of longtime United States Speaker of the House Sam Rayburn), Fannin County has shifted heavily toward the Republican Party since the 1990s. As a sign of this trend, Republican candidates for president have won an ever-increasing share of the vote in each of the seven presidential elections, starting in 1996.

• National Register of Historic Places listings in Fannin County, Texas
• Recorded Texas Historic Landmarks in Fannin County