Boston's 4-0 win in Game 7 on NBC earned a 4.8 rating and 8 share. That's the best since a 7.6/27 for Boston-Philadelphia in 1974.
It's up 2 percent from last year's deciding Game 6 between Chicago and Philadelphia and up 12 percent from the most recent Game 7 in 2009 between Detroit and Pittsburgh.
The seven games averaged 4.6 million viewers on NBC and Versus, the most for a series split between network and cable involving a Canadian team.
The game earned a 43.4/64 in Boston, the best for a hockey game since records began being kept for the market in 1991. That's higher than any game in the Celtics' last two NBA finals.
Ratings represent the percentage of all homes with televisions tuned into a program. Shares represent the percentage of all homes with TVs in use at the time.