Frank Browne's side were involved in an end to end classic against Wexford.
Westmeath missed out on a Leinster title by the smallest possible margin in Portlaoise yesterday.
Wexford were crowned the provincial intermediate ladies champions after beating the Lake County 0-15 to 1-11.
While Wexford led by two points at the break, Frank Browne's side surged back ahead thanks to an Ashley Ruane goal early in the second half after good work from Kelly Boyce-Jordan.
Back Wexford came, and a late Anna Jones point looked like it secured extra-time for Westmeath only for Aoife Cullen to slot the winner from a free for Wexford in the last minute of the game.
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