Title: Houston
Content:  Houston is the most populous city in  Texas, fourth-most populous city in the United States, most populous city in the Southern United States, as well as the sixth-most populous in North America, with a population of 2,304,580 in 2020. Located in Southeast Texas near Galveston Bay and the Gulf of Mexico, it is the seat of Harris County and the principal city of the Greater Houston metropolitan area, which is the fifth-most populous metropolitan statistical area in the United States. Houston is the southeast anchor of the greater megaregion known as the Texas Triangle. Comprising a total area of 637.4 sqmi, Houston is the ninth-most expansive city in the 
Title: History of Houston
Content:  This article documents the wide-ranging history of the city of Houston, the largest city in the state of Texas and the fourth-largest in the United States. The City of Houston was settled in 1837 after Augustus and John Allen had acquired land to establish a new town at the junction of Buffalo and White Oak bayous in 1836. Houston served as the temporary capital of the Republic of Texas. Meanwhile, the town developed as a regional transportation and commercial hub. Houston was part of an independent nation until 1846 when the United States formally annexed Texas. Railroad development began in the late 1850s but ceased during the American Civil War. Houston served the Confederacy as a regional military logistics center. The population increased during the war 
Title: Politics of Houston
Content:  The politics of Houston in the U.S. state of Texas are complex and constantly shifting in part because the city is one of the fastest growing major cities in the United States and is the largest without zoning laws. Houston was founded in 1836 and incorporated in 1837. The city is the county seat of Harris County. A portion of southwest Houston extends into Fort Bend County and a small portion in the northeast extends into Montgomery County. The city of Houston has a strong mayor–council government. The City's elected officials, serving four-year terms, are: the mayor, the city comptroller and 
Title: List of cities and towns in Greater Houston
Content: Houston 
Title: Houston
Content:  Republic of Texas Congress to designate Houston as the temporary capital, agreeing to provide the new government with a state capitol building. About a dozen persons resided in the town at the beginning of 1837, but that number grew to about 1,500 by the time the Texas Congress convened in Houston for the first time that May. The Republic of Texas granted Houston incorporation on June 5, 1837, as James S. Holman became its first mayor. In the same year, Houston became the county seat of Harrisburg County (now Harris County). In 1839, the Republic of Texas relocated its capital to Austin. The town 
Title: History of Houston
Content:  names are still used, even though they do not refer to the original boundaries. Serious violence was a daily occurrence in the late-1830s. In addition to assault via a gentleman's cane, street violence emanated from Houston's many saloons and brothels. When Mexico was again threatening Texas, President Sam Houston moved the capital to Houston on June 27, 1842. However, the Austin residents wanted to keep the archives in their city. This would be known as the Archive Wars. The capital was then moved to Washington on-the-Brazos on September 29. Austin became capital again in 1845, just before Texas gained statehood.
Title: Greater Houston
Content:  Greater Houston, designated by the United States Office of Management and Budget as Houston–The Woodlands–Sugar Land,  is the fifth-most populous metropolitan statistical area in the United States, encompassing nine counties along the Gulf Coast in Southeast Texas. With a population of 6,997,384 people at the 2018 census estimates and 7,122,240 in 2020, Greater Houston is the second-most populous in Texas after the Dallas–Fort Worth metroplex. The approximately 10000 mi2 region centers on Harris County, the third-most populous county in the U.S., which contains the city of Houston—the largest economic and cultural center of the South—with a population of more than 2.3 million. Greater Houston is part of the Texas Triangle megaregion along with the 
Title: List of cities and towns in Greater Houston
Content: The Woodlands 
Title: Houston
Content:  States (including consolidated city-counties). It is the largest city in the United States by total area, whose government is not consolidated with a county, parish, or borough. Though primarily in Harris County, small portions of the city extend into Fort Bend and Montgomery counties, bordering other principal communities of Greater Houston such as Sugar Land and The Woodlands. The city of Houston was founded by land investors on August 30, 1836, at the confluence of Buffalo Bayou and White Oak Bayou (a point now known as Allen's Landing) and incorporated as a city on June 5, 1837. The city is named after former General Sam Houston, who was president 
Title: List of capitals in the United States
Content: Washington (now Washington-on-the-Brazos), 1836 ; Harrisburg (now part of Houston), 1836 ; Galveston, 1836 ; Velasco, 1836 ; West Columbia, 1836 ; Houston, 1837–1839 ; Austin, 1839–1845 During its history as a sovereign nation (Republic of Texas, 1836–1845), seven sites served as the capital of Texas: Annexed by the United States in 1845, Austin remains the capital of the state of Texas.

Question: What is Houston the capital of?
Answer: Harris County.
Harris County, Texas.