Annual Teatro supports a Viva Seguin Conjunto Festival, Noche De Gala Mariachi Singers Competition, Recital that showcases the talent of the Seguin community through folklorico dancing, mariachi playing and singing. Guadalupe County has about a dozen sites listed on the National Register of Historic Places, most of them in Seguin:  In addition, the county boasts 80 Texas State Historical Markers, with about 25 of those within Seguin's city limits. Seguin was represented in the Texas House of Representatives from 1983 to 2010 by the Republican Edmund Kuempel. He was noted for helping to get the State of Texas to restore the 19th century mansion called Sebastopol and operate it as a Historic Site for 25 years. A native of Austin, businessman Kuempel died in office two days after being unopposed for reelection. John Kuempel, Edmund Kuempel's son, won the special election on December 14 of that year to succeed his father in the District 44 seat in the Texas House. He was reelected in 2012 and 2014. Democrat Vicente Gonzalez has represented Guadalupe County in the U.S. House of Representatives as part of Texas' 15th Congressional District, since 2017. One of the "fajita" districts, the 15th runs in a narrow strip from Seguin down to McAllen in the Lower Rio Grande Valley. Seguin is located in the center of Guadalupe County at (29.574329, −97.965332). It is east-by-northeast of downtown San Antonio, on Interstate 10, which serves Seguin with five exits. It is about south of Austin on Highway 123, via Interstate 35, or by Highway 130, a toll road. According to the United States Census Bureau, Seguin has a total area of , of which are land and , or 0.57%, are covered by water. The Guadalupe River flows through the southern side of the city, reaching the Gulf of Mexico south of Victoria. The elevation at the courthouse is above mean sea level.  census As of 2017 the population reached 31,218 people. In 2010, there were 25,175 people, up from 22,011 in 2000. There were 8,794 households, and 5,968 families residing in the city. In 2000, the population density was 1,157.2 people per square mile (446.8/km2)., and there were 8,164 housing units at an average density of 429.2 per square mile (165.7/km2).