| J. C. Ewing | |
| Birth Date: | 1 June 1875 |
| Birth Place: | Gibson City, Illinois, U.S. |
| Death Place: | San Diego, California, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1898 |
| Player Team2: | Chicago |
| Coach Sport1: | Football |
| Coach Years2: | 1900–1901 |
| Coach Team2: | Colorado College |
| Coach Years3: | 1902 |
| Coach Team3: | Baylor |
| Coach Sport4: | Baseball |
| Coach Years5: | 1902 |
| Coach Team5: | Baylor |
| Overall Record: | 10–9–2 (football) 5–9 (baseball) |
| Championships: | Football 1 CFA (1900) |
Joseph Chalmers Ewing (June 1, 1875 – April 5, 1965) was an American college football and college baseball coach. He served as the head football coach at Colorado College from 1900 to 1901 and Baylor University in 1902, compiling a career college football head coaching record of 2–4–2. Ewing was also the first head baseball coach at Baylor, coaching the 1902 season and tallying a mark of 5–9.
Ewing married Louise Woodward Currier on October 29, 1903, in Greeley, Colorado.[1] He later worked as a lawyer in Greeley.[2]