Del Valle is an airport-defined edge city of Austin and part of the Greater Austin area. It was founded upon the 19th-century Santiago Del Valle leagues, the largest granted land parcel in Travis County. It is an unincorporated area in southeastern Travis County, Texas, United States. It has no local government of its own and no official boundaries. However, Austin has annexed portions, including the site of Austin-Bergstrom International Airport in 1990.