| Position: | End, defensive end |
| Number: | 63 |
| Birth Date: | 24 June 1917 |
| Birth Place: | Oklahoma City, Oklahoma, U.S. |
| Death Place: | Glendora, California, U.S. |
| Draftyear: | 1940 |
| Draftround: | 4 |
| Draftpick: | 26 |
| College: | Oklahoma |
| Pastteams: |
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| Statlabel1: | Games played–started |
| Statvalue1: | 11–7 |
| Statlabel2: | Receptions–yards |
| Statvalue2: | 11–91 |
| Statlabel3: | Interceptions |
| Statvalue3: | 1 |
| Highlights: |
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| Pfr: | ShirJo20 |
John Francis Shirk (June 24, 1917 – November 11, 1993) was a professional American football end and defensive end in the National Football League (NFL). He was selected in the fourth round of the 1940 NFL draft.[1] He played one season for the Chicago Cardinals. During World War II, he served as a captain in the field artillery. During the invasion of Salerno, he was captured and held in the German prisoner of war camp Oflag 64 in Poland.