Monon Athletic Conference
The Monon Athletic Conference is an eight-member IHSAA-sanctioned conference in west central Indiana. The conference comprises class 2A and 3A schools from Boone, Clinton, Hendricks, Montgomery, and Putnam counties.
The Monon Athletic Conference set its foundation in 2023 after charter members Crawfordsville, Frankfort, North Montgomery, Southmont, and Western Boone formally separated from the Sagamore Conference after the 2024–2025 academic year citing enrollment differences and growth levels between remaining SAC members Danville, Lebanon, and Tri-West. For stability, the conference considered a number of other schools for expansion to bring the league to eight members. North Putnam joined the league from the Western Indiana Conference on May 19, 2023. Cascade, which was originally leaving the Indiana Crossroads Conference to re-join the WIC shifted course and joined the MAC on September 26, 2023, thus withdrawing their acceptance back into the WIC. Greencastle followed suit thereafter from the WIC formally following their September 2023 board meeting citing competitive balance and travel distance and costs as the primary reason for moving conferences. These moves collectively take the Sagamore Conference to three members and the Western Indiana Conference to nine members.
The name "Monon Athletic Conference" was introduced on February 22, 2024, following discussions by all league members as all eight members fall on or close to the path of the former Monon Railroad which connected Louisville and Indianapolis to Chicago.
Membership
Charter members
All members will begin play in the 2025–2026 academic year.| School | Location | Mascot | Colors | Enrollment | IHSAA Class | County | Year Joined | Previous Conference |
| Cascade | Clayton | Cadets | 546 | 3A | 32 Hendricks | 2025 | Indiana Crossroads | |
| Crawfordsville | Crawfordsville | Athenians | 710 | 3A | 54 Montgomery | 2025 | Sagamore | |
| Frankfort | Frankfort | Hot Dogs | 901 | 3A | 12 Clinton | 2025 | Sagamore | |
| Greencastle | Greencastle | Tiger Cubs | 495 | 2A | 67 Putnam | 2025 | Western Indiana | |
| North Montgomery | Crawfordsville | Chargers | 513 | 3A | 54 Montgomery | 2025 | Sagamore | |
| North Putnam | Roachdale | Cougars | 432 | 2A | 67 Putnam | 2025 | Western Indiana | |
| Southmont | New Market | Mounties | 453 | 2A | 54 Montgomery | 2025 | Sagamore | |
| Western Boone | Thorntown | Stars | 513 | 3A | 06 Boone | 2025 | Sagamore |
Membership timeline
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Period = from:2025 till:2026
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Colors = id:barcolor
id:line value:pink
id:bg value:white
id:Full value:rgb # Use this color to denote a team that is a member in all sports
id:FullxF value:rgb # Use this color to denote a team that is a member in all sports except for football
id:AssocF value:rgb # Use this color to denote a team that is a member for football only
id:AssocOS value:rgb # Use this color to denote a team that is a member in some sports, but not all
id:OtherC1 value:rgb # Use this color to denote a team that has moved in from another conference
id:OtherC2 value:rgb # Use this color to denote a team that has left for another conference
PlotData=
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bar:1 color:Full from:2025 till:2026 text:Cascade
bar:2 color:Full from:2025 till:2026 text:Crawfordsville
bar:3 color:Full from:2025 till:2026 text:Frankfort
bar:4 color:Full from:2025 till:2026 text:Greencastle
bar:5 color:Full from:2025 till:2026 text:North Montgomery
bar:6 color:Full from:2025 till:2026 text:North Putnam
bar:7 color:Full from:2025 till:2026 text:Southmont
bar:8 color:Full from:2025 till:2026 text:Western Boone
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text:^"Monon Athletic Conference membership history"
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Conference champions
2025–2026
State champions
Football
- 2025 - Cascade - Class 3A