Luk Thung (Thai: ลูกทุ่ง; lit. "child/children of the fields") refers to the most popular form of a style of music found in Thailand. The term is short for pleng luk thung (Thai: เพลงลูกทุ่ง; lit. "song of a child of the fields").

Luk Thung songs typically reflect the hardship of everyday life among the rural poor. Tempos tend to be slow, and singers use an expressive singing style with a lot of vibrato. Comparisons are sometimes made with country music of the United States.

The form developed in the first half of the 20th century, although the term luk thung was first used in the 1960s. Ponsri Woranut and Suraphol Sombatcharoen were the genre's first big stars, incorporating influences from Latin America, Japan, Indonesia, Malaysia and, especially, American film soundtracks and country music (including yodeling). Many of the most popular early luk thung stars have come from the central city of Suphanburi, including megastar Pumpuang Duangjan, who adapted it to 1980s string (Thai pop) music by making a dance-ready form called electronic luk thung. When Pompuang died in 1992, many observers felt that luk thung would die with her. It survived, however, and with the advent of the first all luk thung radio station in 1997 soon saw a major revival.