Ontario
Please email any updates, corrections or errors to miamihoosier@nullmsn.com
| Rank | Grower | Weight | Year | Weigh-off | Hometown |
| Phil & Jane Hunt | 1959 | 2018 | Woodbridge Fair | Cameron |
| Phil & Jane Hunt | 1939.5 | 2020 | Port Elgin Pumpkinfest | Cameron |
| John Matesa | 1897 | 2020 | Port Elgin Pumpkinfest | Breslau |
| John Matesa | 1855 | 2018 | Port Elgin | Breslau |
| Phil & Jane Hunt | 1814 | 2019 | Woodbridge Fair | Cameron |
| Bob & Elaine MacKenzie | 1812.5 | 2020 | Port Elgin Pumpkinfest | Tiverton |
| Ryan Hoelke | 1803 | 2016 | Woodbridge Fair | Eganville |
| Ryan Hoelke | 1800.5 | 2016 | PE County P Fest | Eganville |
| Phil & Jane Hunt | 1771.5 | 2019 | Port Elgin | Cameron |
| Jeff Warner | 1760 | 2020 | Port Elgin Pumpkinfest | Englehart |
| Top Ten Average | 1841.2 | Pounds | Updated: | 10/28/2020 |