Luling is a city in Caldwell County, Texas, United States, along the San Marcos River. The population was 5,080 at the 2000 census. There is some debate as to how Luling got its name. Some say it was named for a Chinese railroad worker, others for a judge named Luling. Most likely it was the maiden name of a railroad builder's wife, though no one can be certain. It is part of the Greater Austin area.