Lorimer Rich (December 24, 1891 – June 2, 1978) was an American architect, born in Camden, New York.
He is now best remembered for collaborating with sculptor Thomas Hudson Jones on the winning entry in a nationwide competition to create a design for the Tomb of the Unknown Soldier in Arlington National Cemetery.
This was followed by further studies in Europe, a standard move for many young American architects of that era.
Upon returning to the United States he worked for the prestigious architectural firm McKim, Mead and White.
He was buried in Arlington National Cemetery with his wife Martha Ross Leigh (1894–1987) not far from the Tomb of the Unknown.