Summerlin is a surname. Notable people with the surname include:
Ed Summerlin (1928–2006), American composer, jazz saxophonist and music educator George T. Summerlin (1872–1947), United States Army officer and diplomat Jacob Summerlin (1820–1893), Florida cattleman, founder of Orlando Mark Summerlin (born 1970), American songwriter Robert L. Summerlin, American judge and politician Sam Summerlin (1928–2017), American journalist and writer William Summerlin (born 1938), American dermatologist