Mary Sears

Mary Sears may refer to:


 * Mary Sears, birth name of Mary Sears McHenry (1834–1912) American community organizer
 * Mary Sears (oceanographer) (1905–1997), United States Naval Reserve officer and oceanographer
 * USNS Mary Sears (T-AGS-65), a 2001 United States Navy oceanographic survey ship named after her
 * Mary Sears (swimmer) (born 1939), American swimmer