Hispanic or Latino of any race were 55.4% of the population.There were 8,794 households out of which 29.3% had their own children under the age of 18 living with them, 43.9% were married couples living together, 17.9% had a female householder with no husband present, and 32.1% were non-families.
MTS produces four free children's concerts each season; two in Seguin and two in New Braunfels.
More than 3600 fourth and fifth grade students attend a free symphonic concert each season.
The population was spread out with 25.4% under the age of 18, 8.3% from 20 to 24, 23.0% from 25 to 44, 23.2% from 45 to 64, and 16.0% who were 65 years of age or older. Females were 51.7%, and males were 48.3% of the populations.
In 2000, the median income for a household in the city was $31,618, and the median income for a family was $36,931.
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.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. Democrat Ruben Hinojosa has represented Guadalupe County in the U. House of Representatives as part of Texas' 15th Congressional District, since 2012.One of the "fajita" districts, the 15th runs in a narrow strip from Seguin down to Mc Allen in the Lower Rio Grande Valley.Seguin is located in the center of Guadalupe County at It is 35 miles (56 km) east-by-northeast of downtown San Antonio, on Interstate 10, which serves Seguin with five exit.It is about 50 miles (80 km) south of Austin on Highway 123, via Interstate 35, or 62 miles (100 km) by Highway 130, a toll road.According to the United States Census Bureau, Seguin has a total area of 34.7 square miles (89.8 km of 2010, there were 25,175 people, up from 22,011 in 2000.