The Oro-Medonte 77's were a Junior ice hockey team based out of Oro-Medonte, Ontario, Canada. Their arena was in the community of Guthrie, Ontario. They played in the Greater Metro Junior 'A' Hockey League.
In April 2008, it was announced that Oro-Medonte had received its first junior hockey club since 1992. In May it was announced that the club would be known as the Oro-Medonte 77's. The name pays homage to Oro's long hockey history, and the team's predecessor the Oro 77's who participated in the Georgian Bay Junior C Hockey League from 1977 until 1992. http://www.officialgamepuck.com/TownIndex/Canadian/OntarioTowns/Oro77s.htm
On September 15, 2008, the Oro-Medonte 77's played their first ever GMHL game, on the road, in Richmond Hill against the Ontario Lightning Rams. Oro emerged victorious, winning 8-6.
After three seasons in the GMHL, in the Summer of 2011, the 77's ceased operation.
| Season | GP | W | L | T | OTL | GF | GA | P | Results | |
| 2008-09 | 43 | 22 | 15 | - | 6 | 205 | 165 | 50 | 8th GMJHL | |
| 2009-10 | 42 | 11 | 25 | - | 6 | 145 | 272 | 28 | 10th GMHL | |
| 2010-11 | 42 | 14 | 22 | - | 6 | 171 | 223 | 34 | 9th GMJHL | |
| 3 Seasons | 127 | 47 | 62 | - | 18 | 521 | 660 | -- | 0.441 |
Nipissing Alouettes defeated Oro-Medonte 77's 3-games-to-none in division quarter-final
Toronto Canada Moose defeated Oro-Medonte 77's 6-4 in last minute qualifier
Oro-Medonte 77's defeated Algoma Avalanche 2-games-to-none in qualifier
South Muskoka Shield defeated Oro-Medonte 77's 3-games-to-none in quarter-final