Frank Chamberlain Clark (1872–1957) was an American architect active in Southern Oregon . Many of his works are listed on the National Register of Historic Places (NRHP).
Clark has been said to be "the leading architect of the Rogue River Valley from the time of his arrival in southern Oregon in 1902 to his retirement in 1945."
Clark was joined in partnership by Robert Keeney in 1935.
All are in Oregon, unless indicated otherwise
Ashland Masonic Lodge Building (1909), 25 N Main St, Ashland , NRHP-listedFirst Baptist Church (1911), 241 Hargadine St, Ashland, NRHP-listedBarnum Hotel (1914), 204 N Front St, Medford , NRHP-listed Craterian Ginger Rogers Theater (1924), Medford Holly Theatre (1929-30), 226 W 6th St, Medford, NRHP-listedFrank Chamberlain Clark House (1930), 1917 E Main St, Medford. Colonial Revival. NRHP-listed Chauncy M. Brewer House (1930), E. Main St., Medford. Colonial Revival. ▪Ulrich House (1922), 839 Minnesota Ave., Medford. Colonial Revival
Walter Bowne House, 1845 Old Stage Rd, Jacksonville , NRHP-listed BPOE Lodge No. 1168, 202 N Central Ave, Medford, NRHP-listed Victor and Bertha Bursell House, 3075 Hanley Rd, Central Point , NRHP-listed Carter-Fortmiller House, 514 Siskiyou Blvd, Ashland, NRHP-listed Chappell-Swedenburg House, 990 Siskiyou Blvd, Ashland, NRHP-listed Michael Clemens House, 612 NW 3rd St, Grants Pass , NRHP-listed Corning Court Ensemble, 5-16 Corning Ct, Medford, NRHP-listed E. Raymond Driver House, 4140 Old Stage Rd, Central Point, NRHP-listed Enders Building, 250-300 E Main St, Ashland, NRHP-listed Fluhrer Bakery Building, 29 N Holly St, Medford, NRHP-listed C. E. "Pop" Gates House, 1307 Queen Anne Ave, Medford, NRHP-listed Glenview Orchard Ensemble, 1395 Carpenter Hill Rd, Phoenix , NRHP-listed Edgar F. Hafer House, 426 W 6th St, Medford, NRHP-listed Liberty Building, 201 W Main St, Medford, NRHP-listed Medford Central Firehall, 110 E 6th St, Medford, NRHP-listed Humboldt Pracht House, 234 Vista St, Ashland, NRHP-listed Root-Banks House, 11 N Peach St (1000 W Main St), Medford, NRHP-listed Sparta Building, 12 N Riverside St, Medford, NRHP-listed Dr. Charles T. and Mary Sweeney House, 2336 Table Rock Rd, Medford, NRHP-listed George Taverner House, 912 Siskiyou Blvd, Ashland, NRHP-listed Henry Van Hoevenberg, Jr., House, 9130 Ramsey Canyon Rd, Gold Hill , NRHP-listed 
