Jelks is a surname. Notable people with the surname include:
Amanda Jelks (born 1986), American actress Andrew Jelks (born 1993), American football player Edward B. Jelks (1922–2021), American archaeologist Greg Jelks (1961–2017), American-born Australian baseball player Jalen Jelks (born 1996), American football player John Earl Jelks (born 1959), American actor Mark Jelks (born 1984), American track and field athlete Na'Taki Osborne Jelks, American environmental scientist Simone Jelks (born 1986), American basketball referee William D. Jelks (1855–1931), American newspaper editor, publisher, and politician
See also Jelks Preserve, Florida