McEwin is the surname of the following people
George McEwin (1815–1885), Australian gardener and orchardist George McEwin (lawyer) (1873–1945), Australian lawyer and philanthropist Jim McEwin (1898–1979), New Zealand cricketer Lyell McEwin (1897–1988), Australian politician Ron McEwin (1928–2007), Australian rules footballer
See also Lyell McEwin Hospital, major hospital for Adelaide, South Australia