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

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