'''McCosker''' is a surname. Notable people with the surname include:
* John E. McCosker, American ichthyologist * John McCosker (rower) (1910–1965), American rower * Kim McCosker, Australian writer * Rick McCosker (born 1946), Australian cricketer
==See also== *''Thomas McCosker v The State'', Fiji lawsuit * Tim McOsker (born 1962), American politician * McCusker, surname
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