Koch Diamond
| Location | Cretin Avenue S, St. Paul, MN, United States |
|---|---|
| Coordinates | 44°56′43″N 93°11′27″W / 44.945179°N 93.190971°W |
| Owner | University of St. Thomas (Minnesota) |
| Operator | University of St. Thomas (Minnesota) |
| Capacity | 250 |
| Field size | Left Field: 320 ft Center Field: 465 ft Right Field: 320 ft |
| Surface | AstroTurf (infield) Natural grass (outfield) |
| Scoreboard | Electronic |
| Construction | |
| Broke ground | 2005 |
| Built | 2005 |
| Opened | April 22, 2006 |
| Renovated | 2017 |
| Construction cost | $300,000 |
| Tenants | |
| St. Thomas (Minnesota) Tommies baseball (Summit) (2006–present) | |
Koch Diamond is a baseball venue in St. Paul, Minnesota, United States. It is home to the St. Thomas Tommies baseball team of the NCAA Division I Summit League. The field opened in 2006 and is named for the former St. Thomas pitcher David Koch.