Cornwall is an English surname and may refer to:
Alan Cornwall (disambiguation)
Barry Cornwall (1787–1874), pseudonym of Bryan Procter, English poet
Beda Cornwall (1907–1994), American librarian
Charles Wolfran Cornwall (1735–1789), British politician
Claudia Maria Cornwall (born 1948), Canadian writer
Jeff Cornwall (born 1991), Canadian lacrosse player
John Cornwall (disambiguation)
John of Cornwall (disambiguation)
Luke Cornwall (born 1980), English footballer
Nigel Cornwall (1903–1984), English bishop
Rahkeem Cornwall (born 1993), Antiguan cricketer
Richard Cornwall (disambiguation)
Sonia Cornwall (1919–2006), Canadian artist
Thomas Cornwall (1468–1537), English politician
Travis Cornwall (born 1990), Canadian lacrosse player