Katherine McGregor (or similar) may refer to:
Actors Katherine MacGregor (1925–2018), American actress a/k/a Scottie MacGregor Kate McGregor-Stewart (born 1944), American actress in Wonder Park Kate McGregor (born 1972), English actress known for Emmerdale
Others Cathy McGregor (born 1955), Canadian legislator in British Columbia Cate McGregor (born 1956), Australian transgender writer and commentator Catherine MacGregor (born 1972), French business executive Katie McGregor (born 1977), American long distance runner Katharine MacGregor, American public official since 2000s Kate MacGregor (born 1991), English Olympic competitor in sailing
Characters Kate "XO" McGregor, played by Lisa McCune on 2007 Australian TV drama Sea Patrol