| Wilmer D. Elfrink | |
| Birth Date: | 27 December 1893 |
| Birth Place: | Cherokee, Iowa, U.S. |
| Death Place: | Los Angeles, California, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1914–1915 |
| Player Team2: | Coe |
| Coach Sport1: | Football |
| Coach Years2: | 1919 |
| Coach Team2: | Des Moines |
| Coach Years3: | 1920 |
| Coach Team3: | Fairmount |
| Coach Years4: | 1921 |
| Coach Team4: | University Farm |
| Coach Sport5: | Basketball |
| Coach Years6: | 1920–1921 |
| Coach Team6: | Fairmount |
| Coach Years7: | 1921–1922 |
| Coach Team7: | University Farm |
| Overall Record: | 11–9–3 (football) 18–7 (basketball) |
Wilmer Dale Elfrink (December 27, 1893 – September 22, 1948) was an American football and basketball coach.[1]
Elfrink played sports while attending Coe College in Cedar Rapids, Iowa. He was a key player on the football team of 1914 under head coach Moray Eby that the college considers to be one of the best teams the school fielded of all time.[2]
Elfrink was the 12th head football coach at Fairmount College—known as now Wichita State University—Wichita, Kansas, serving for one season, in 1920 season, and compiling a record of 3–4–2.[3] He also served that academic year as head basketball coach, leading his team to a record of 16–2.[4]
The next year, Elfrink became the head football coach at the University Farm—now known as the University of California, Davis—for the 1921 season.[5]