Joplin is an English surname. Notable people with the surname include:
Germaine Joplin (1903–1989), Australian geologist
Janis Joplin (1943–1970), American singer-songwriter
Josh Joplin, American singer-songwriter
Scott Joplin (c. 1867–1917), American ragtime composer
Stan Joplin (born 1957), American basketball coach
Thomas Joplin (c. 1790–1847), English timber merchant and banker
Fictional characters
Trudy Joplin, character in television series Miami Vice
Piero Joplin, natural philosopher in the 2012 video game Dishonored
