Title: Houston, Missouri
Content:  Houston is a city in Texas County, Missouri, United States. The population was 2,081 at the 2010 census. It is the county seat of Texas County.
Title: Houston County, Tennessee
Content:  Houston County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 8,426. Its county seat is Erin. The county was founded in 1871. It was named for Sam Houston.
Title: Houston County, Texas
Content:  Houston County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 23,732. Its county seat is Crockett. Houston County was one of 46 entirely dry counties in the state of Texas, until voters in a November 2007 special election legalized the sale of alcohol in the county. Houston County was the first new county created under the 9-year Republic of Texas on June 12, 1837. The original boundaries of Houston County also included all of present-day Anderson and Trinity Counties, and portions of present-day Henderson and Polk Counties. The county is named for Sam Houston, President of the Republic of Texas and Governor of Texas. Other than being named for the same person, Houston County is not related to the City of Houston, which is located about 100 mi to the south, in Harris County. A county historical museum is located in a former railroad depot, located on First Street in Crockett.
Title: Texas County, Missouri
Content:  Texas County is a county located in the southern portion of the U.S. state of Missouri. As of the 2010 census, the population was 26,008. Its county seat is Houston. The county was organized in 1843 as Ashley County, changing its name in 1845 to Texas, after the Republic of Texas. The 2010 U.S. Census indicates that the county was the center of population for the United States.
Title: Greater Houston
Content: Austin County ; Brazoria County ; Chambers County ; Fort Bend County ; Galveston County ; Harris County ; Liberty County ; Montgomery County ; Waller County As defined by the U.S. Office of Management and Budget, the metropolitan area of Houston–The Woodlands–Sugar Land encompasses nine counties in Southeast Texas. They are listed below: 
Title: Houston, Missouri
Content:  Houston is located in the Missouri Ozarks in central Texas County, at the intersection of U.S. Route 63 and Missouri Route 17. Cabool is approximately 15 miles to the southwest and Licking about 12 miles to the northeast on route 63. According to the United States Census Bureau, the city has a total area of 3.64 sqmi, all land. Houston is the second-largest city in Texas County, behind Cabool. The town is located south of Rolla.
Title: Harris County, Texas
Content:   Harris County is located in the U.S. state of Texas. As of the 2020 census, the population was 4,731,145, making it the most populous county in Texas and the third most populous county in the United States. Its county seat is Houston, the largest city in Texas and fourth largest city in the United States. The county was founded in 1836 and organized in 1837. It is named for John Richardson Harris, who founded the town of Harrisburg on Buffalo Bayou in 1826. According to a July 2018 census estimate, Harris County's population had grown to 4,698,619, comprising over 16% of Texas's population. Harris County is included in the nine-county Houston–The Woodlands–Sugar Land metropolitan statistical area, which is the fifth-most populous metropolitan area in the United States.
Title: Harris County, Texas
Content: Baytown (partly in Chambers County) ; Friendswood (mostly in Galveston County) ; Houston (county seat and largest municipality) (small parts in Fort Bend and Montgomery counties) ; Katy (partly in Fort Bend and Waller counties) ; League City (mostly in Galveston County) ; Missouri City (mostly in Fort Bend County) ; Pearland (mostly in Brazoria County and a small part in Fort Bend County) ; Seabrook (some water surface in Chambers County) ; Stafford (mostly in Fort Bend County) ; Waller (partly in Waller County) 
Title: Fort Bend County, Texas
Content: Houston (mostly in Harris County and a small part in Montgomery County) ; Katy (partly in Harris and Waller Counties) ; Missouri City (small part in Harris County) ; Pearland (mostly in Brazoria County and a small part in Harris County) ; Stafford (small part in Harris County) 
Title: Houston County, Texas
Content: Abe ; Allen Chapel ; Arbor Grove ; Ash ; Augusta ; Austonio ; Belott ; Burrantown ; Center Grove ; Center Hill ; Cooper ; Creek ; Cut ; Germany ; Holly ; Hopewell ; Mapleton ; Mound City (partly in Anderson County) ; Mount Vernon ; Pennington (partly in Trinity County) ; Porter Springs ; Ratcliff ; Refuge ; San Pedro ; Sand Ridge ; Shady Grove ; Smith Grove ; Tadmor ; Volga ; Weches ; Weldon 

Question: what county is houston tx in?
Answer: Montgomery County.