| Copper and Glass | | 1925 | | | |
| Copper and Walnut Box | | 1934 | | | |
| Copper Bowl | | 1933 | | | |
| Copper Bowl | | 1936 | | | |
| Copper Box | | 1927 | | | Second Prize |
| Copper Box and Enamel | | 1926 | | | First Prize |
| Copper Box, Enamel Mounting | | 1931 | | | |
| Copper Cigaret Box | | 1924 | | | |
| Copper Coils | | 1935 | | | |
| Copper Lustre Pitcher | | 1932 | | | |
| Copper Nut Bowl | | 1932 | | | |
| Copper Vase | | 1928 | | | |
| Copper, enamel cigarette box | | 1928 | | | |
| Copperware | | 1934 | | | |
| Corfe, Dorset | | 1930 | | | Second Prize |
| Cormorants, California | | 1919 | | | |
| Corn Hill | | 1937 | | | |
| Corner Grovery | | 1929 | | | |
| Cornfield in Winter, Wickliffe, Ohio | | 1919 | | | Commended |
| Cosmetics | | 1937 | | | |
| Cosmopolitan | | 1935 | | | |
| Cottage | | 1930 | | | |
| Cottage Garden | | 1922 | | | |
| Country Church | | 1938 | | | |
| Country Doctor | | 1938 | | | |
| Country Geometrics | | 1938 | | | |
| Country Road after Heavy Rain | | 1928 | | | |
| Courthouse | | 1934 | | | |
| Courtyard, Beauvais, France | | 1920 | | | |
| Cousin Alma | | 1935 | | | |
| Cradles of the Mighty | | 1926 | | | Third Prize |
| Crawford Notch, Mr. Webster | | 1922 | | | |
| Cream Ladle | | 1937 | | | |
| Creative Plant | | 1936 | | | |
| Creepers | | 1935 | | | |
| Crescendo | | 1935 | | | |
| Crocker | | 1937 | | | |
| Crocks and Boilers | | 1935 | | | |
| Crossing the Stream | | 1939 | | | Honorable Mention |
| Crowd Watching Parade | | 1932 | | | |
| Crows' Nest | | 1936 | | | |
| Crow's Nest | | 1938 | | | |
| Crumbling River Bank | | 1939 | | | First Prize |
| Cry Baby Cry | | 1939 | | | |
| Cry of a Race | | 1937 | | | |
| Crystal and Flowers | | 1925 | | | Second Prize |
| Crystal Shadows | | 1936 | | | |
| Curves | | 1929 | | | Honorable Mention |
| Curvilinear | | 1937 | | | |
| Cut, No. 1 | | 1935 | | | |
