Frost is a city in Navarro County, Texas, United States. The population was 620 at the 2020 census.

Frost was founded by fifth generation Texan, Miles Frost in 1899 as a trading post for north central Texas farmers.

The town was established in 1881 when the St. Louis Southwestern Railway was constructed through Frost on its way from Corsicana to Hillsboro. It was named after Samuel R. Frost, attorney for the railroad and a prominent local politician.

According to the United States Census Bureau, the city has a total area of 1.1 square miles (2.8 km), of which 1.1 square miles (2.8 km) is land and 0.88% is water.

Historical population

Census	Pop.	Note	%±
1900	621		—
1910	702		13.0%
1920	913		30.1%
1930	748		−18.1%
1940	671		−10.3%
1950	585		−12.8%
1960	508		−13.2%
1970	548		7.9%
1980	564		2.9%
1990	579		2.7%
2000	648		11.9%
2010	643		−0.8%
2020	620		−3.6%
U.S. Decennial Census 2020 Census

As of 2022 the American Community Survey estimates, there were 740 people and 236 households. The population density was 654.3 inhabitants per square mile (252.6/km). There were 258 housing units at an average density of 228.1 per square mile (88.1/km). The racial makeup of the city was 70.1% White, 16.8% some other race, and 4.1% Black or African American, with 9.1% from two or more races. Hispanics or Latinos of any race were 23.9% of the population.

Of the 236 households, 51.3% had children under the age of 18 living with them, 25.0% had seniors 65 years or older living with them, 66.9% were married couples living together, 2.5% were couples cohabitating, 11.0% had a male householder with no partner present, and 19.5% had a female householder with no partner present. The median household size was 3.14 and the median family size was 3.41.

The age distribution was 28.0% under 18, 6.8% from 18 to 24, 23.4% from 25 to 44, 29.1% from 45 to 64, and 12.8% who were 65 or older. The median age was 37.2 years. For every 100 females, there were 94.2 males.

The median income for a household was $78,000, with family households having a median income of $77,500 and non-family households $68,750. The per capita income was $25,312. Males working full-time jobs had median earnings of $65,625 compared to $39,286 for females. Out of the 729 people with a determined poverty status, 10.4% were below the poverty line. Further, 9.7% of minors and 3.2% of seniors were below the poverty line.

In the survey, residents self-identified with various ethnic ancestries. People of American descent made up 7.8% of the population of the town, followed by Irish at 7.7%, English at 7.0%, German at 5.3%, Hungarian at 2.4%, Scotch-Irish at 1.5%, Scottish at 1.4%, Swedish at 1.2%, and French at 0.9%.

The City of Frost is served by the Frost Independent School District.

The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Frost has a humid subtropical climate, abbreviated "Cfa" on climate maps.

On May 6, 1930, a tornado struck the city, destroying many buildings and leaving 41 dead. The event was commemorated in the song "Frost Texas Tornado Blues" by Texas Alexander and the Mississippi Sheiks, recorded April 9, 1934 in San Antonio, Texas on the Okeh label.

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  Downtown Frost
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  Downtown Frost
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  Downtown Frost
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  City Hall