Welby
Welby may refer to:
Entertainment
- Marcus Welby, M.D., a 1970s television series in the United States
 
Places
- Welby, New South Wales, Australia, a town
 - Welby, Lincolnshire, United Kingdom, a village
 - Welby, Colorado, United States, a census-designated place
 
People
- Welby baronets, created in 1801
 - Sir Alfred Welby, English politician
 - Alfredo Welby, Italian professional footballer
 - Amelia Welby (1819–1852), American poet
 - Sir Christopher Welby-Everard, British Army officer
 - Euphemia Welby, Women's Royal Naval Service officer
 - Henry Welby (died 1636), English recluse
 - Justin Welby (born 1956), Archbishop of Canterbury 2013–2025
 - Norrie May-Welby, Scottish-Australian transgender social activist
 - Piergiorgio Welby, subject of a right-to-die debate in Italy
 - Reginald Welby, 1st Baron Welby, British peer
 - Siân Welby, English television presenter and radio host
 - Thom Welby, American politician and broadcaster.
 - Thomas Welby, English missionary
 - Thomas Welby (Irish politician)
 - Victoria, Lady Welby, self-educated English philosopher of language