Koch Diamond

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Koch Diamond is a ballpark in St. Paul, Minnesota, home of the St. Thomas Tommies, who play NCAA Division I baseball in the Summit League. It opened in 2006, making it 20 years old in 2026 and seats about 250 fans. The closest MLB stadium is Target Field in Minneapolis, about 10 miles away.

Ballpark facts

Location
St. Paul, Minnesota
Home of
St. Thomas Tommies (NCAA Division I)
League / conference
Summit League
Opened
2006
Capacity
250

Ballparks near Koch Diamond10

  1. 1Triple-ACHS Field — St. Paul Saints & Hamline Pipers (St. Paul, Minnesota)same city
  2. 2D-IIBarnes Field — Concordia–St. Paul Golden Bears (St. Paul, Minnesota)same city
  3. 3D-IIIHargis Park — Bethel Royals (Arden Hills, Minnesota)nearby
  4. 4D-IIINicholson Field — Macalester Scots (St. Paul, Minnesota)same city
  5. 5D-IIIReynolds Field — Northwestern Eagles (St. Paul, Minnesota)same city
  6. 6JUCOCentury Wood Ducks Baseball Field — Century Wood Ducks (White Bear Lake, Minnesota)nearby
  7. 7MLBTarget Field — Minnesota Twins (Minneapolis, Minnesota)10 mi
  8. 8D-ISiebert Field — Minnesota Golden Gophers (Minneapolis, Minnesota)10 mi
  9. 9D-IIIAugsburg Auggies Baseball Field — Augsburg Auggies (Minneapolis, Minnesota)10 mi
  10. 10JUCOAmes Baseball Field — Dakota County Tech Blue Knights (Rosemount, Minnesota)15 mi

Other Summit League ballparks5

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The St. Thomas Tommies share the Summit League with 5 other teams listed on Inside the Park. Here they are, nearest first.

  1. 1D-IErv Huether Field — South Dakota State Jackrabbits (Brookings, South Dakota)186 mi
  2. 2D-INewman Outdoor Field — North Dakota State Bison (Fargo, North Dakota)221 mi
  3. 3D-ITal Anderson Field — Omaha Mavericks (Omaha, Nebraska)295 mi
  4. 4D-IJ. L. Johnson Stadium — Oral Roberts Golden Eagles (Tulsa, Oklahoma)628 mi
  5. 5D-IJackson Field — Northern Colorado Bears (Greeley, Colorado)668 mi

Questions about Koch Diamond

What other ballparks are in the Summit League?

5 other Summit League teams play at parks listed here. The nearest are Erv Huether Field, Newman Outdoor Field, and Tal Anderson Field.

Where do the St. Thomas Tommies play home games?

The St. Thomas Tommies play at Koch Diamond in St. Paul, Minnesota.

When did Koch Diamond open?

Koch Diamond opened in 2006.

How many people does Koch Diamond hold?

Koch Diamond has a capacity of about 250.

What is the closest MLB stadium to Koch Diamond?

Target Field in Minneapolis, Minnesota, about 10 miles away.

What other ballparks are near Koch Diamond?

CHS Field is also in St. Paul. See the full list of nearby ballparks on this page.

Facts are for the 2026 season. Distances are straight-line miles between city centers. Capacity figures vary by source and some include lawn seating. See something wrong? Let us know. Is this your ballpark? Get the “Listed on Inside the Park” badge for your website.