Wemyss can refer to:
- Places
- Wemyss Bay, a large village in Inverclyde, Scotland
- Wemyss Bay railway station
- Castle Wemyss, a demolished mansion in Wemyss Bay, Scotland
- East Wemyss, Fife, Scotland
- West Wemyss, Fife, Scotland
- Wemyss Castle, a large mansion in Fife, Scotland
- Wemyss Caves, Fife, Scotland
- Castle Wemyss (sugar estate), Jamaica
- Wemyss House, a residence hall at the University of the Pacific, Stockton, California
- Titles
- Baron Wester Wemyss, a creation in the peerage of the United Kingdom
- Earl of Wemyss, a creation in the peerage of the United Kingdom
- People
- Clan Wemyss, Scottish clan
- Wemyss Mackenzie Simpson (1824-1894), Canadian fur-trader
- Kathy Wemyss, Australian musician
- Stig Wemyss, Australian character actor and voice-over artist
- Other
- Wemyss Ware, a type of pottery
- Castle Wemyss (march), a slow march for pipe band, used by the Seaforth Highlanders