Trailing by two goals at the break, Longford responded in determined fashion to earn a vital point.
Having made such an enterprising start to the campaign, Galway made an impact early on.
Two minutes in, Enda Curran wriggled clear on the right before drilling an inviting cross for strike partner Vinny Faherty, who supplied an opportunistic close range finish.
It took the in-form Faherty’s seasonal account to eight with Galway continuing to cause the visitors problems initially.
Winger Gary Shanahan examined Longford custodian Paul Skinner’s reflexes in the 10th minute as Galway probed.
Longford were struggling to deal with Galway, who added a second goal on the half hour mark courtesy of Curran.
Ryan Connolly’s deep corner found Curran and the Galway attacker guided Tommy Dunne’s rapidly improving team further ahead.
By the time the interval rolled around, Galway were content to be departing protecting a healthy advantage.
Three minutes after the restart, Longford substitute Kaleem Simon’s free-kick was headed wide by O’Sullivan as the visitors’ threatened briefly.
Longford trimmed the deficit in the 60th minute when Josh O’Hanlon climbed highest to nod home in a crowded area.
The midlanders’ levelled on 69 in bizarre circumstances as O’Hanlon’s effort struck the woodwork before rebounding off Galway goalkeeper Conor Winn for an own goal.
Winn; Horgan, Sinnott, Cantwell, Walsh; Shanahan, Sullivan, Connolly, Ludden; Curran (Cunningham, 65, Keating 68), Faherty.
Skinner; Haverty (Mulhall, 76), Rossiter, Flynn, Powell; Cowan (Simon, 46), Gannon, O’Connor, O’Sullivan; Hughes (Dillon, 66); O’Hanlon.
P McLaughlin (Monaghan).