| Clare Under-21A Football Championship | |
|---|---|
| Irish | Craobh Fé-21A Peile an Chláir |
| Founded | 1964 |
| Trophy | John Marrinan Cup |
| Title holders | |
| Most titles | |
| Sponsors | Berwick Callinan Murphy Solicitors |
The Clare Under-21A Football Championship (abbreviated to Clare 21AFC) is an annual GAA club competition organised by the Clare County Board between the top-ranking under-21 gaelic football clubs in County Clare, Ireland.
The winners of the Clare 21AFC are presented with the John Marrinan Cup.
The current (2024) champions are St. Joseph's, Doora-Barefield who defeated Lissycasey by 1-12 to 0-14 after extra time, to win their first title since 2008, and second overall.
| # | Club | Wins | Years won |
|---|---|---|---|
| 1. | | 13 | 1966, 1983, 1984, 1995, 1996, 1998, 2001, 2003, 2004, 2005, 2006, 2007, 2016 |
| 2. | | 7 | 1968, 1980, 1981, 1982, 1987, 2019 (with Shannon Gaels), 2021 (as Cill Cúil Gaels) |
| 3. | | 6 | 1967, 1969, 1997, 1999, 2019 (with Kilmihil), 2021 (as Cill Cúil Gaels) |
| 4. | | 5 | 1972, 1986, 1988, 1991, 2017 |
| | 2000, 2013, 2014, 2015, 2018 | ||
| | 1970, 1971, 1977, 1978, 2002 (with Liscannor) | ||
| | 1976, 1979, 1989, 1992, 1993 | ||
| 8. | | 3 | 1964, 1965, 1974 |
| | 2010, 2022, 2023 | ||
| 10. | | 2 | 2009, 2011 |
| | 1975, 1994 | ||
| | 2008, 2024 | ||
| 13. | | 1 | 2012 |
| | 2021 (as Cill Cúil Gaels) | ||
| | 2021 (as Cill Cúil Gaels) | ||
| | 2002 (with Miltown Malbay) | ||
| | 1985 | ||
| St. Michael's | 1973 | ||
| | 1990 |