Trinity County is a county located in the U.S. state of Texas. As of the 2020 census, the population was 13,602.^[1] Its county seat is Groveton.^[2] The county is named for the Trinity River.

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Trinity County
County
The Trinity County Courthouse in Groveton
Location within the U.S. state of Texas
Texas's location within the U.S.
Coordinates: 31°05′N 95°07′W
Country	United States
State	Texas
Founded	1850
Named for	Trinity River
Seat	Groveton
Largest city	Trinity
Area
• Total	714 sq mi (1,850 km2)
• Land	694 sq mi (1,800 km2)
• Water	20 sq mi (50 km2)  2.9%
Population  (2020)
• Total	13,602
• Density	19/sq mi (7.4/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	17th
Website	www.co.trinity.tx.us

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Trinity County is included in the Huntsville, TX Micropolitan Statistical Area.

According to the U.S. Census Bureau, the county has a total area of 714 square miles (1,850 km²), of which 694 square miles (1,800 km²) is land and 20 square miles (52 km²) (2.9%) is water.^[3]

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^[8] of 2000, there were 13,779 people, 5,723 households, and 4,000 families residing in the county. The population density was 20 people per square mile (7.7 people/km²). There were 8,141 housing units at an average density of 12 units per square mile (4.6 units/km²). The racial makeup of the county was 83.75% White, 11.92% Black or African American, 0.41% Native American, 0.23% Asian, 0.01% Pacific Islander, 2.66% from other races, and 1.01% from two or more races. 4.85% of the population were Hispanic or Latino of any race.

There were 5,723 households, out of which 25.70% had children under the age of 18 living with them, 55.10% were married couples living together, 11.20% had a female householder with no husband present, and 30.10% were non-families. 26.80% of all households were made up of individuals, and 14.60% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.85.

In the county, the population was spread out, with 22.90% under the age of 18, 7.00% from 18 to 24, 22.30% from 25 to 44, 25.80% from 45 to 64, and 22.00% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 93.60 males. For every 100 females age 18 and over, there were 90.70 males.

The median income for a household in the county was $27,070, and the median income for a family was $32,304. Males had a median income of $27,518 versus $21,696 for females. The per capita income for the county was $15,472. About 13.20% of families and 17.60% of the population were below the poverty line, including 23.80% of those under age 18 and 13.90% of those age 65 or over.

The following school districts serve Trinity County:

• Apple Springs Independent School District
• Groveton Independent School District
• Trinity Independent School District
• Centerville Independent School District

A small portion of Kennard ISD, located in neighboring Houston County, goes into Trinity County.

The county is in the service area of Angelina College.^[9]

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