2009–10 WOAA Senior League season

The 2009–10 WOAA Senior League season was the 20th season of the WOAA Senior AA Hockey League. The league played a 20-game regular season which began in October 2009 and concluded in January 2010. The post-season began in January 2010 and concluded in April 2010.

The Elora Rocks won the WOAA Senior AA Hockey Championship, defeating the Petrolia Squires in the final round of the playoffs.

Team changes

 * The Exeter Mohawks ceased operations during the off-season.
 * The Nottawasaga River Rats ceased operations during the off-season.

Final standings
Note: GP = Games played; W = Wins; L= Losses; OTL = Overtime losses; GF = Goals for; GA = Goals against; Pts = Points; Green shade = Clinched playoff spot

(N2) Shelburne Muskies vs. (N3) Saugeen Shores Winterhawks
Note: Game five was played in Dundalk, Ontario.

WOAA Senior "A" Hockey playoffs
The eight teams that lost in the "AA" qualifying playoff round participated in the "A" playoffs

WOAA Senior "B" Hockey playoffs
The bottom three teams in the league standings did not qualify for the Senior AA playoff qualifying round and played in the Senior B playoffs.

Round robin
The top two teams in the round robin qualify for the WOAA Sr. "B" finals.