There was little between the sides throughout, with the teams level at 1-5 to 0-8 at half-time.
St Kevin's have secured the Kildare Junior Football Championship title following a 4-9 to 1-15 win over Cappagh in Saturday's county final.
The victory sees St Kevin's return to intermediate football next season, having claimed their first Junior Championship title since 1976.
There was little between the sides throughout, with the teams level at 1-5 to 0-8 at half-time.
Cappagh took the lead during the second half, but St Kevin's responded with goals from James Ralph and Dylan Brereton to keep themselves in contention.
Brereton proved decisive in the closing minutes, scoring his second goal to help secure a three-point victory.
Declan O'Flaherty contributed four points for the winners, while Jack Mulligan finished with 11-points for Cappagh.
The result marks just the second Junior Football Championship title in St Kevin's history.
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