San Jacinto County (/ˌsæn dʒəˈsɪntoʊ/ SAN jə-SIN-toh) is a county in the U.S. state of Texas. As of the 2020 census, its population was 27,402.^[1] Its county seat is Coldspring.^[2] The county's name comes from the Battle of San Jacinto which secured Texas' independence from Mexico and established a republic in 1836.

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San Jacinto County
County
The San Jacinto County Courthouse in Coldspring
Location within the U.S. state of Texas
Texas's location within the U.S.
Coordinates: 30°35′N 95°10′W
Country	United States
State	Texas
Founded	1870
Named for	Battle of San Jacinto
Seat	Coldspring
Largest city	Shepherd
Area
• Total	628 sq mi (1,630 km2)
• Land	569 sq mi (1,470 km2)
• Water	59 sq mi (150 km2)  9.3%
Population  (2020)
• Total	27,402
• Density	44/sq mi (17/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	8th
Website	www.co.san-jacinto.tx.us

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According to the U.S. Census Bureau, the county has a total area of 628 square miles (1,630 km²), of which 569 square miles (1,470 km²) are land and 59 square miles (150 km²) (9.3%) are covered by 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^[9] of 2000, there were 22,246 people, 8,651 households, and 6,401 families residing in the county. The population density was 39 people per square mile (15 people/km²). There were 11,520 housing units at an average density of 20 units per square mile (7.7/km²). The racial makeup of the county was 83.64% White, 12.64% Black or African American, 0.46% Native American, 0.28% Asian, 0.07% Pacific Islander, 1.63% from other races, and 1.28% from two or more races. 4.87% of the population were Hispanic or Latino of any race.

There were 8,651 households, out of which 30.00% had children under the age of 18 living with them, 60.20% were married couples living together, 9.70% had a female householder with no husband present, and 26.00% were non-families. 22.60% of all households were made up of individuals, and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 2.98.

In the county, the population was spread out, with 25.20% under the age of 18, 7.40% from 18 to 24, 24.90% from 25 to 44, 26.60% from 45 to 64, and 15.90% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 100.50 males. For every 100 females age 18 and over, there were 97.40 males.

The median income for a household in the county was $32,220, and the median income for a family was $37,781. Males had a median income of $34,614 versus $22,313 for females. The per capita income for the county was $16,144. About 15.10% of families and 18.80% of the population were below the poverty line, including 22.80% of those under age 18 and 17.60% of those age 65 or over.

School districts include

• Coldspring-Oakhurst Consolidated Independent School District
• Shepherd Independent School District
• Cleveland Independent School District (partial)
• Willis Independent School District (partial)

Areas of San Jacinto County in Coldspring-Oakhurst CISD and Shepherd ISD are assigned to Angelina College. Areas in Cleveland ISD and Willis ISD are assigned to Lone Star College.^[11]

• List of museums in the Texas Gulf Coast
• National Register of Historic Places listings in San Jacinto County, Texas
• Recorded Texas Historic Landmarks in San Jacinto County
• Pine Island (Lake Livingston)