Hewitt oversaw a strong campaign last season but has struggled for results this year.
Athlone Town Women find themselves on the hunt for a new manager this morning.
Tommy Hewitt stepped down last night, with the Midlands club seventh in the SSE Airtricity Women's Premier Division.
Hewitt led Athlone to victory in this year's President's Cup after a penalty shoot out win over Shelbourne.
However it was Shels that proved to be Hewitt's last game over Town.
The midlanders were well beaten, 4-1 at home to the Dublin side, in the first round of the All-Island Cup last time out.
Last season, Athlone managed second place in the league last season, and they were also beaten in the Women's FAI Cup final.
The club said they "regretfully" accepted Hewitt's resignation.
Statement from Athlone Town AFC
— Athlone Town AFC (@AthloneTownAFC) June 21, 2023
The Board of Athlone Town AFC can confirm that we have regretfully accepted the resignation of Tommy Hewitt who has stepped down from his position with our Senior Women’s National League Team.
Keeping Up Unbeaten League Start The Aim For Athlone Town Women
Two Pointer Rule Makes Big Difference To Gaelic Football - Emmet McDonnell
Shane Lowry Records Opening Round Of 72
Tullamore Town FC Ready For Red Letter Weekend
Busy Bank Holiday Weekend In Store For Athlone Town
Big Weekend Ahead In Leinster Minor And U20 Hurling Championships
Leinster SFC: Opportunity Beckons For Westmeath
Westmeath Footballer Luke Loughlin Ruled Out For Remainder Of Season
Laois And Westmeath Battle For Place In Leinster LGFA Decider
Alex Dunne Set For Action In Miami This Weekend
Fundraising Walk Planned For Westmeath Man Left Paralysed In Freak Accident
Shane Lowry In Action In Miami This Week
Westmeath Secure Leinster Minor Football Quarter Final
CCFL: Two Draws In Senior Division
Potential Hometown Fight On The Cards For Joe Ward
Ava O'Connor Breaks Personal Steeplechase Record
Laois Fixture In Two Weeks A "Massive Game" - Kevin O'Brien
Camross Camogie Honoured In Laois Following Historic All-Ireland Triumph
Athlone Town Secure Vital Win In Women's Premier Division
Laois And Westmeath To Clash In Leinster Camogie Decider