Patricia Nixon Cox (born February 21, 1946 in Whittier, California) is the daughter of former U.S. president Richard Nixon and his wife, Pat. She is the older sister of Julie Nixon Eisenhower.

The opposite of her sibling, Tricia performed more of a ceremonial role, accompanying her father to many campaign stops and, after he became president, state trips around the world. She married White House aide Edward Cox in a Rose Garden ceremony in 1971; the wedding was described in Life magazine as "akin to American royalty".