Cameron County

Cameron County is the southernmost county located in the U.S. state of Texas. As of the 2010 census, its population was 406,220. Its county seat is Brownsville. Cameron County was founded in 1848. Cameron is named for Captain Ewen Cameron, a soldier during the Texas Revolution and in the ill-fated Mier Expedition.
Cameron County is part of the BrownsvilleHarlingen Metropolitan Statistical Area as well as the BrownsvilleHarlingenRaymondville Combined Statistical Area.



According to the U.S. Census Bureau, the county has a total area of 1,276 square miles (3,304.8 km2), of which 906 square miles (2,346.5 km2) is land and 371 square miles (960.9 km2) (29.03%) is water.

Major highways

  • US 77.svg U.S. Highway 77

US-77 is a freeway through Harlingen to Brownsville, blocks north of the International Border.

  • US 83.svg U.S. Highway 83

US-83 is a Freeway through Harlingen and Brownsville.

  • US 281.svg U.S. Highway 281

US-281 is called the ‘Military Highway’ through Cameron County, and runs roughly adjacent to the Rio Grande River and the Border.

  • Texas 4.svg State Highway 4
  • Texas 48.svg State Highway 48
  • Texas 100.svg State Highway 100
  • Texas 107.svg State Highway 107


  • Adjacent counties and municipalities

Willacy County, Texas (north)
Hidalgo County, Texas (west)
Matamoros Municipality, Tamaulipas, Mexico (south)

To the east, the county borders the Gulf of Mexico.

National protected areas

Laguna Atascosa National Wildlife Refuge (part)
Lower Rio Grande Valley National Wildlife Refuge (part)
Palo Alto Battlefield National Historic Site


As of the census of 2000, there were 335,227 people, 97,267 households, and 79,953 families residing in the county.

The population density was 370 people per square mile (143/km²). There were 119,654 housing units at an average density of 132 per square mile (51/km²).

The racial makeup of the county was 80.29% White, 0.48% Black or African American, 0.44% Native
American, 0.48% Asian, 0.03% Pacific Islander, 15.98% from other races, and 2.30% from two or more races. 84.34% of the population were Hispanic or Latino of any race.

There were 97,267 households out of which 45.80% had children under the age of 18 living with
them, 60.80% were married couples living together, 17.40% had a female householder with no husband present, and 17.80% were non-families. 15.40% of all households were made up of individuals and 7.60% had someone living alone who was 65 years of age or older. The average household size was 3.40 and the average family size was 3.81.

In the county, the population was spread out with 33.80% under the age of 18, 10.50% from 18 to
24, 26.80% from 25 to 44, 17.80% from 45 to 64, and 11.10% who were 65 years of age or older. The median age was 29 years.

For every 100 females there were 91.90 males. For every 100 females age 18 and over, there
were 86.30 males.

The median income for a household in the county was $26,155, and the median income for a family
was $27,853. Males had a median income of $22,755 versus $18,182 for females. The per capita income for the county was $10,960. About 28.20% of families and 33.10% of the population were below the poverty line, including 43.10% of those under age 18 and 22.90% of those age 65 or over.

A 2000 Texas A&M study stated that of the residents of Cameron County, 43% do not have basic
literary skills.


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