Sinclair House may refer to: Upton Sinclair House, Monrovia, California, listed on the National Register of Historic Places (NRHP) Reginald Sinclaire House, Larkspur, Colorado, NRHP-listed Dr. Archibald Neil Sinclair House, Honolulu, Hawaii, NRHP-listed T. M. Sinclair Mansion, Cedar Rapids, Iowa, NRHP-listed Harry F. Sinclair House, New York, New York, NRHP-listed Sinclair House (Manhattan hotel) (c.1787-1908), New York, New York See also Sinclair Building (disambiguation) Sinclair Service Station (disambiguation)