Shamrock is a city in Wheeler County, Texas, United States. As of the 2010 census, the city had a total population of 1,910. The city is located in the eastern portion of the Texas Panhandle centered along the crossroads of Interstate 40 (formerly U.S. Route 66) and U.S. Route 83. It is 110 miles (180 km) east of Amarillo, 188 miles (303 km) west of Oklahoma City, and 291 miles (468 km) northwest of Dallas.
Shamrock is located at 35°13′2″N 100°14′50″W / 35.21722°N 100.24722°W / 35.21722; -100.24722 (35.217116, −100.247171).
According to the United States Census Bureau, the city has a total area of 2.1 square miles (5.4 km²), all of it land.
As of the census of 2000, 2,029 people, 852 households, and 550 families resided in the city. The population density was 979.7 people per square mile (378.5/km²). The 1,072 housing units averaged 517.6 per square mile (200.0/km²). The racial makeup of the city was 85.26% White, 4.83% African American, 1.38% Native American, 0.99% Asian, 0.20% Pacific Islander, 5.91% from other races, and 1.43% from two or more races. Hispanic or Latino residents of any race were 13.41% of the population.
Of the 852 households, 28.3% had children under the age of 18 living with them, 50.7% were married couples living together, 9.9% had a female householder with no husband present, and 35.4% were not families. About 33.0% of all households were made up of individuals, and 17.6% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.95.
In the city, the population was distributed as 25.3% under the age of 18, 6.3% from 18 to 24, 23.7% from 25 to 44, 22.4% from 45 to 64, and 22.3% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 87.9 males. For every 100 females age 18 and over, there were 83.1 males.
The median income for a household in the city was $25,776, and for a family was $33,542. Males had a median income of $24,688 versus $16,944 for females. The per capita income for the city was $13,724. About 22.7% of families and 21.4% of the population were below the poverty line, including 24.7% of those under age 18 and 20.0% of those age 65 or over.