Sidney Lovell (February 26, 1867 — August 6, 1938) was an American architect best known for designing mausoleums, and to a lesser extent theaters and opera houses.
His first cemetery commission, the mausoleum at Rosehill Cemetery in Chicago, Illinois, is considered his best work.
He obtained a patent on an improved mausoleum ventilation system in 1917.
Two of his works are listed on the National Register of Historic Places.