Mary Ann Aspinwall Owens (June 24, 1928 – November 21, 2005), of New York City, was an advocate of thematic collecting of postage stamps, such as collecting stamps showing birds, ships or famous art.

She helped introduce thematic collecting into national and international philatelic exhibitions.

She exhibited her collections at national and international philatelic events, and won numerous gold prizes.

She was accredited as a thematic judge by the American Topical Association, the American Philatelic Society, and the Fédération Internationale de Philatélie, and served as judge at many shows.

In 1991 she received the Luff Award of the American Philatelic Society in the category Exceptional Contributions to Philately'.