| Appleton A. Mason | |
| Birth Date: | 11 June 1880 |
| Birth Place: | Parrsboro, Nova Scotia, Canada |
| Death Place: | New Rochelle, New York, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1905 |
| Player Team2: | Springfield |
| Coach Sport1: | Football |
| Coach Years2: | 1908–1909 |
| Coach Team2: | Warrensburg Teachers |
| Coach Years3: | 1910–1912 |
| Coach Team3: | Tulane |
| Coach Years4: | 1918 |
| Coach Team4: | NYU |
| Coach Sport5: | Basketball |
| Coach Years6: | 1908–1910 |
| Coach Team6: | Warrensburg Teachers |
| Coach Years7: | 1912–1913 |
| Coach Team7: | Tulane |
| Admin Years1: | 1908–1909 |
| Admin Team1: | Warrensburg Teachers |
| Admin Years2: | 1910–1913 |
| Admin Team2: | Tulane |
| Overall Record: | 15–23–4 (football) 23–13 (basketball) |
Appleton Adams Mason (June 11, 1880 – December 20, 1938)[1] was an American football player, coach of football and basketball, and physical education instructor. He served as the head football coach at Warrensburg Teachers College—now known as the University of Central Missouri—from 1908 to 1909, Tulane University from 1910 to 1912, and New York University (NYU) in 1918, compiling a career college football coaching record of 15–23–4. Mason was also the head basketball coach Warrensburg Teachers from 1908 to 1910 and at Tulane for the 1912–13 season, tallying a career college basketball mark of 23–13. He was born in Parrsboro, Nova Scotia, and died on December 20, 1938, in the New Rochelle Hospital in New Rochelle, New York.[2]
Mason attended Springfield College, where he was a captain of the football team and competed on the track and field team.[3]
Mason was the founder of Camp Agawam in Raymond, Maine. He founded the camp in 1919. Mason went to Crescent Lake in Raymond every summer. Following his death in 1938, he was succeeded as camp director in 1939 by his son, Appleton Mason, Jr.[4]