Alder (surname)
Alder is a surname. Notable people with the surname include:
- Alan Alder, Australian ballet dancer
- Alison Alder, Australian screenprinter
- Berni Alder, German-born American physicist
- Christian Alder, German footballer
- Christopher Alder, British former soldier who died in police custody; see Death of Christopher Alder
- Danny Alder, Australian actor
- Don Alder, Canadian fingerstyle guitarist
- Douglas D. Alder, American historian and academic administrator
- Esther Alder, Swiss politician
- Fred Alder, Australian rules footballer
- Henry Alder, Australian rules footballer
- Janine Alder, Swiss ice hockey goaltender
- Jim Alder, British distance runner who competed in the 1968 Summer Olympics
- John C. Alder, English musician better known as "Twink"
- Jonathan Alder, American pioneer
- Joshua Alder, British zoologist and malacologist
- Kurt Alder, German chemist, co-winner of the 1950 Nobel Prize in Chemistry
- * Alder, a lunar crater named after Kurt Alder
- * Diels–Alder reaction, a chemical reaction named after Otto Diels and Kurt Alder
- Mike Alder, Australian mathematician and writer
- Ray Alder, American singer with the band Fates Warning
- Roger Alder, British organic chemist
- Thomas Alder, German actor
- Vera Stanley Alder, English portrait painter and mystic
; Other people named Alder
