| Ewald O. Stiehm | |
| Birth Date: | 9 April 1886 |
| Birth Place: | Johnson Creek, Wisconsin, U.S. |
| Death Place: | Bloomington, Indiana, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1906–1908 |
| Player Team2: | Wisconsin |
| Player Positions: | Center |
| Coach Sport1: | Football |
| Coach Years2: | 1910 |
| Coach Team2: | Ripon |
| Coach Years3: | 1911–1915 |
| Coach Team3: | Nebraska |
| Coach Years4: | 1916–1921 |
| Coach Team4: | Indiana |
| Coach Sport5: | Basketball |
| Coach Years6: | 1910–1911 |
| Coach Team6: | Ripon |
| Coach Years7: | 1911–1915 |
| Coach Team7: | Nebraska |
| Coach Years8: | 1919–1920 |
| Coach Team8: | Indiana |
| Admin Years1: | 1916–1922 |
| Admin Team1: | Indiana |
| Overall Record: | 59–23–4 (football) 69–22 (basketball) |
| Championships: | Football 5 MVIAA (1911–1915) Basketball 3 MVIAA (1912–1914) |
Ewald O. "Jumbo" Stiehm (April 9, 1886 – August 18, 1923) was an American football player, coach of football and basketball, and college athletics administrator. He served as the head football coach at Ripon College in Ripon, Wisconsin (1910), the University of Nebraska–Lincoln (1911–1915), and Indiana University (1916–1921), compiling a career college football record of 59–23–4. Stiehm was also the head basketball coach at Nebraska from 1911 to 1915 and at Indiana from 1919 to 1920, tallying a career mark of 69–22.
Stiehm began his coaching career at Ripon College in 1910, where he led the Red Hawks football team to a 4–3 record.[1] From 1911 to 1915, he coached football at Nebraska, and compiled a 35–2–3 record. From 1913 to 1915, his teams went undefeated seasons. In the history of the Nebraska Cornhuskers football program, Stiehm has the highest winning percentage (.913) of anyone who coached more than two games. From 1916 to 1921, he coached at Indiana, and compiled a 20–18–1 record.
Stiehm died on August 18, 1923, in Bloomington, Indiana, at the age of 37 after an 11-month bout with stomach cancer.[2]