Hays County is a county in the central portion of the U.S. state of Texas. It is part of the Austin-Round Rock metropolitan area. As of the 2020 census, its official population had reached 241,067. The county seat is San Marcos. Hays, along with Comal and Kendall Counties, was listed in 2017 as one of the nation's fastest-growing counties with a population of at least 10,000. From 2015 to 2016, Hays County, third on the national list, had nearly 10,000 new residents during the year.

The county is named for John Coffee Hays, a Texas Ranger and Mexican–American War officer who fought the Texas- Comanche wars of the 1800s.

This section is in list format but may read better as prose. You can help by converting this section, if appropriate. Editing help is available. (December 2013)

Hays County has been inhabited for thousands of years. Evidence of Paleo-Indians found in the region goes as far back as 6000 BC. Archeological evidence of native agriculture goes back to 1200 AD.

The earliest Europeans to arrive in the area were explorers and missionaries from the Spanish Empire. Father Isidro Félix de Espinosa, Father Antonio de San Buenaventura y Olivares, and Pedro de Aguirre traveled through the area in 1709. A few years later, French-Canadian Louis Juchereau de St. Denis was attacked by Comanches in 1714.

More permanent European influence was established in 1755, when the Mission San Francisco Xavier de los Dolores was established among the Apache tribe. In 1831, Coahuila y Tejas issued a land grant to Juan Martín de Veramendi, to Juan Vicente Campos in 1832, and to Thomas Jefferson Chambers in 1834. The Mexican government issued a land grant to the first Anglo-American settler in the county, Thomas G. McGhee of Tennessee, in 1835.

On March 1, 1848, the legislature formed Hays County from Travis County. The county is named for Tennessee native Captain John Coffee Hays of the Texas Rangers. San Marcos was named as the county seat. The legislature established Blanco from part of Hays in 1858, but incorporated part of Comal into Hays. Risher and Hall Stage Lines controlled 16 of 31 passenger and mail lines in Texas.

In 1861, voters in the county favored secession from the Union. The next year, the state legislature transferred more of Comal County to Hays County. In 1867, the first cattle drive from Hays County to Kansas occurred.

The International-Great Northern Railroad was completed from Austin to San Marcos in 1880. Camp Ben McCulloch, named after a brigadier general, was organized in 1896 for reunions of United Confederate Veterans. A teacher's college, Southwest Texas State Normal School, was established in San Marcos in 1899.

Wonder Cave opened to the public in 1900. The current Hays County Courthouse in San Marcos was erected in 1908 in Beaux-Arts style by architect C.H. Page and Bros. The Aquarena Springs tourist site opened in 1928 in San Marcos.

Lyndon Baines Johnson graduated from Southwest Texas State Teachers College in 1930. In 1942, construction of San Marcos Army Air Field began. San Marcos Army Air Field was renamed Gary Air Force Base in 1953 to honor Second Lieutenant Arthur Edward Gary, the first San Marcos resident killed in World War II.

The state legislature resurveyed the Hays and Travis County lines, adding 16,000 acres (65 km) to Hays County, in 1955. In 1964, President Lyndon Johnson announced the establishment of a Job Corps center based at the deactivated Gary Air Force Base.

According to the U.S. Census Bureau, the county has an area of 680 sq mi (1,800 km), of which 1.9 sq mi (4.9 km) (0.3%) are covered by water. The county is predominantly in the Edwards Plateau, with the southeast portion in the Texas Blackland Prairies.

• Travis County (north)
• Caldwell County (east)
• Guadalupe County (southwest)
• Comal County (south)
• Blanco County (northwest)

• Interstate 35
• U.S. Highway 290
• State Highway 21
• State Highway 80

• San Marcos Regional Airport - general aviation airport without commercial flights

School districts in Hays County include:

• Blanco
• Comal
• Dripping Springs Independent
• Hays Consolidated Independent
• Johnson City
• San Marcos Consolidated
• Wimberley Independent

As of 2020, the county has six high schools, 10 middle schools, and 24 elementary schools.

Higher education in Hays County includes one four-year institution, Texas State University, in San Marcos.

Austin Community College is the designated community college for the whole county. It operates three distance-learning centers that offer basic and early college start classes, along with testing centers for online classes.

Historical population

Census	Pop.	Note	%±
1850	387		—
1860	2,126		449.4%
1870	4,088		92.3%
1880	7,555		84.8%
1890	11,352		50.3%
1900	14,142		24.6%
1910	15,518		9.7%
1920	15,920		2.6%
1930	14,915		−6.3%
1940	15,349		2.9%
1950	17,840		16.2%
1960	19,934		11.7%
1970	27,642		38.7%
1980	40,594		46.9%
1990	65,614		61.6%
2000	97,589		48.7%
2010	157,127		61.0%
2020	241,067		53.4%
2023 (est.)	280,486		16.4%
U.S. Decennial Census 2010 2020

Hays County, Texas – Racial and ethnic composition
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 may be of any race.

Race / Ethnicity (NH = Non-Hispanic)	Pop 2000	Pop 2010	Pop 2020	% 2000	% 2010	% 2020
White alone (NH)	62,945	92,062	121,568	64.50%	58.60%	50.43%
Black or African American alone (NH)	3,448	4,970	9,004	3.53%	3.16%	3.74%
Native American or Alaska Native alone (NH)	368	502	599	0.38%	0.32%	0.25%
Asian alone (NH)	740	1,699	4,822	0.76%	1.08%	2.00%
Pacific Islander alone (NH)	47	104	144	0.05%	0.07%	0.06%
Other race alone (NH)	138	226	1,009	0.14%	0.14%	0.42%
Mixed race or Multiracial (NH)	1,044	2,143	11,050	1.07%	1.36%	4.58%
Hispanic or Latino (any race)	28,859	55,401	92,871	29.57%	35.26%	38.52%
Total	97,589	157,107	241,067	100.00%	100.00%	100.00%

As of the 2015 Texas population estimate program, the county's population was 193,963: non-Hispanic Whites, 106,919 (55.1%); non-Hispanic Blacks, 5,860 (3.0%); other non-Hispanics, 6,624 (3.4%); and Hispanics and Latinos (of any race), 74,560 (38.4%).

As of the census of 2000, 97,589 people, 51,265 households, and 22,150 families resided in the county. The population density was 144 people per square mile (56 people/km). The 55,643 housing units averaged 53 units per square mile (20/km). The racial makeup of the county was 78.92% White, 3.68% Black or African American, 0.69%Native American, 0.79% Asian, 0.07% Pacific Islander, 13.36% from other races, and 2.49% from two or more races. About 29.57% of the population were Hispanic or Latino of any race.

Of the 33,410 households, 34.0% had children under 18 living with them, 53.1% were married couples living together, 9.00% had a female householder with no husband present, and 33.7% were not families; 21.0% of all households were made up of individuals, and 4.9% had someone living alone who was 65 or older. The average household size was 2.69, and the average family size was 3.21.

A Williams Institute analysis of 2010 census data found about 7.4 same-sex couples per 1,000 households in the county.

The county's population was distributed as 24.5% under 18, 20.5% from 18 to 24, 28.2% from 25 to 44, 19.1% from 45 to 64, and 7.7% who were 65 or older. The median age was 28 years. For every 100 females, there were 101.30 males. For every 100 females 18 and over, there were 99.50 males.

The county's median household income was $45,006 and the median family income was $56,287. Males had a median income of $35,209 versus $27,334 for females. The county's per capita income was $19,931. About 6.40% of families and 14.30% of the population were below the poverty line, including 10.30% of those under age 18 and 9.70% of those age 65 or over.

Hays County currently leans towards the Democratic Party in federal elections. The county was strongly Democratic-leaning before the 1970s, then (like some other suburban counties in the state) began trending towards the Republican Party in the 1970s.

The county began trending Democratic again in the late 2010s and early 2020s, backing Democrats for governor (in both 2018 and 2022), Senate (in 2018, 2020 and 2024), and President (in 2020 and 2024), despite Democrats losing statewide in all those races.

Until 2020, when Joe Biden won the county with 54.4% of the vote, the last Democrat to carry Hays County in a presidential election was Bill Clinton, with a plurality of 39.8% of the vote in 1992. The last Democrat to win a majority of the vote in the county before 2020 was Jimmy Carter, with 54.4% in 1976. Lloyd Bentsen had been the last Democratic Senate candidate to carry the county, winning 69.2% of the vote in 1988, until 2018, when Beto O'Rourke carried the county with 57.1% of the vote.

United States presidential election results for Hays County, Texas

Year	Republican		Democratic		Third party(ies)
	No.	%	No.	%	No.	%
2020	47,680	43.59%	59,524	54.41%	2,191	2.00%
2016	33,826	46.87%	33,224	46.04%	5,114	7.09%
2012	31,661	53.65%	25,537	43.27%	1,813	3.07%
2008	29,638	50.19%	28,431	48.15%	983	1.66%
2004	27,021	56.50%	20,110	42.05%	692	1.45%
2000	20,170	58.78%	11,387	33.18%	2,760	8.04%
1996	12,865	47.93%	11,580	43.14%	2,395	8.92%
1992	10,008	36.70%	10,842	39.76%	6,417	23.53%
1988	11,716	50.36%	11,187	48.09%	361	1.55%
1984	12,467	64.98%	6,663	34.73%	57	0.30%
1980	6,517	49.04%	6,013	45.25%	759	5.71%
1976	5,714	44.38%	7,005	54.41%	156	1.21%
1972	5,406	56.79%	4,068	42.74%	45	0.47%
1968	1,993	32.23%	3,546	57.35%	644	10.42%
1964	1,279	25.26%	3,780	74.64%	5	0.10%
1960	1,606	35.46%	2,916	64.39%	7	0.15%
1956	1,873	47.98%	2,017	51.66%	14	0.36%
1952	2,135	50.74%	2,070	49.19%	3	0.07%
1948	555	18.58%	2,239	74.96%	193	6.46%
1944	495	20.39%	1,690	69.60%	243	10.01%
1940	453	16.02%	2,371	83.84%	4	0.14%
1936	286	12.66%	1,964	86.94%	9	0.40%
1932	220	10.73%	1,822	88.88%	8	0.39%
1928	1,088	63.70%	620	36.30%	0	0.00%
1924	394	18.86%	1,616	77.36%	79	3.78%
1920	242	14.61%	1,075	64.92%	339	20.47%
1916	123	10.86%	995	87.82%	15	1.32%
1912	60	5.63%	939	88.17%	66	6.20%

Ann Richards in 1990 was the last Democratic gubernatorial candidate to win the county, when she took 56.6% of the vote that year, until 2018, when Lupe Valdez won with a 49.6% plurality.

In the 2022 elections, Democrats won all but one race in Hays County; They flipped several countywide seats previously held by Republicans.

Democratic voters mostly reside along the I-35 Corridor and communities East. Communities West of the I-35 Corridor lean Republican. San Marcos, home of Texas State University, and the city of Kyle generally vote Democratic. Driftwood, Dripping Springs, Wimberley, and Woodcreek generally vote Republican. Elections within the county are often decided by margins in Bear Creek, Belterra, Buda, and the county's northcentral border along Travis County.

Position		Name	Party
	County Judge	Ruben Becerra	Democratic
	Commissioner, Precinct 1	Debbie Ingalsbe	Democratic
	Commissioner, Precinct 2	Michelle Cohen	Democratic
	Commissioner, Precinct 3	Lon Shell	Republican
	Commissioner, Precinct 4	Walt Smith	Republican

Position		Name	Party
	Criminal District Attorney	Kelly Higgins	Democratic
	District Clerk	Avery Anderson	Democratic
	County Clerk	Elaine Cárdenas	Democratic
	Sheriff	Gary Cutler	Republican
	Tax Assessor-Collector	Jenifer O’Kane	Republican
	Treasurer	Daphne Sanchez Tenorio	Democratic

• Austin (primarily in Travis County and a small part in Williamson County)
• Niederwald (partly in Caldwell County)
• San Marcos (county seat) (small parts in Caldwell and Guadalupe counties)
• Uhland (partly in Caldwell County)

• Bear Creek

• Belterra
• Driftwood

• Goforth

• 
  Blanco River
• 
  Another view of the Blanco River
• 
  Texas Hill Country
• 

• List of museums in Central Texas
• National Register of Historic Places listings in Hays County, Texas
• Recorded Texas Historic Landmarks in Hays County

• DeCook, K. James (1963). Geology and Ground-water Resources of Hays County, Texas. Texas Board of Water Engineers. Washington, D.C.: United States Department of the Interior, Geological Survey. OCLC 961366150.

• Hays County government's website Archived September 14, 2017, at the Wayback Machine
• Hays County from the Handbook of Texas Online
• HaysWeb - Hays County Information
• Hays County Historical Commission

30°04′N 98°02′W / 30.06°N 98.03°W / 30.06; -98.03