Spring is a census-designated place (CDP) within the extraterritorial jurisdiction of Houston in Harris County, Texas, United States, part of the Houston–The Woodlands–Sugar Land metropolitan area. The population was 54,298 at the 2010 census. While the name "Spring" is popularly applied to a large area of northern Harris County and a smaller area of southern Montgomery County, the original town of Spring, now known as Old Town Spring, is located at the intersection of Spring-Cypress and Hardy roads and encompasses a relatively small area of perhaps 1 km2.
The large geographic area now known as Spring was originally inhabited by the Orcoquiza Native Americans. In 1836, the Texas General Council of the Provisional Government placed what is now the town of Spring in the Harrisburg municipality. In 1838, William Pierpont placed a trading post on Spring Creek. In 1840, the town of Spring had 153 residents. By the mid-1840s, many German immigrants, including Gus Bayer and Carl Wunsche, moved to the area and began farming. People from Louisiana and other parts of the post-Civil War Southern U.S. settled in Spring. The main cash crops in Spring were sugar cane and cotton; area residents also grew vegetables.
In 1871, the International and Great Northern Railroad, built through Spring, opened, which caused Spring to expand.