- Ontario Disc Sports Association (http://www.ondisc.org/)
- Barrie (http://www.barrieultimate.com/)
- Brampton (http://www.bramptonultimateclub.com/)
- Collingwood (http://www.georgianbayultimate.ca/)
- Durham (http://www.durhamultimateclub.com/)
- Guelph (http://www.guelphultimate.ca)
- Guelph (http://www.perpetualmotion.org/GuelphUltimate/Main.htm)
- Hamilton (HUC) (http://hamiltonultimate.com/)
- Kingston (http://www.kingstonultimate.ca/)
- Lakehead University (http://flash.lakeheadu.ca/%7Eludf/ludf.html)
- London (http://www.londonultimate.ca/)
- Milton (http://www.urbansports.ca/)
- Newmarket (http://www.newmarketultimate.com)
- North Bay (http://www.northbayultimate.org/)
- Ottawa (OCUA) (http://www.ocua.ca/)
- Peterborough (www.pultimate.ca/)
- Sarnia (http://www.sarniaultimate.com/)
- Sault Ste. Marie (http://www.saultultimate.ca)
- St. Catharines (http://www.canadianultimate.com/stcatharinesultimate/)
- Sudbury (http://www.sudburyultimate.com)
- Toronto (TUC) (http://www.tuc.org)
- Waterloo (http://www.wods.ca)
- University of Western (http://www.geocities.com/uwoultimate)
