Castledine is a surname, and may refer to
Annie Castledine (1939–2016), British theatre director, teacher and dramaturg Fred Castledine (1937–2019), Australian rules football player Gary Castledine (born 1970), Scottish former footballer Leo Castledine (born 2005), English footballer George Castledine (died 2018), British nursing educator and nursing consultant Stafford Castledine (1912–1986), English cricketer Stewart Castledine (born 1973), English former footballer