New Braunfels (pronounced /ˌnjuː ˈbrɔːnfəlz/ ( listen)) is a city in Comal and Guadalupe counties in the U.S. state of Texas that is a principal city of the San Antonio–New Braunfels metropolitan area. Braunfels means "brown rock" in German; the city is named for Braunfels, in Germany. The city's population was 36,494 as of the 2000 census, and estimated at 51,804 in 2007. It is the seat of Comal County.

New Braunfels has a sizeable German Texan community. During the 19th century, its name was often spelled Neu-Braunfels, even by English speakers. The town holds a German-style festival, Wurstfest ("sausage festival"), every November to celebrate the city's German heritage. The newspaper Herald Zeitung was originally two newspapers: The Herald (published in English) and The Zeitung (published in German) until 1967.

New Braunfels draws a fair amount of tourists from across the state, particularly because of the cold-spring rivers that run through the city. Many generations of families still return during the summer to tube down the Guadalupe River and Comal River. New Braunfels is the site of a water park, Schlitterbahn WaterPark Resort. The Comal River is one of the shortest in the world at just 3.2 miles (5.2 km) long, before emptying into the Guadalupe River. The headwaters of the Comal are located in present day Landa Park, where hundreds of artesian springs flow from the Edwards Aquifer. The upper reaches are surrounded by park and private residences, while the lower portions are open for recreation.