Seattle topped the local market NFL franchise ratings for the week of December 21-27, 2015 with a 44.8/73 household rating/share for the Rams-Seahawks week 16 contest.
44.8% of the Seatle-Tacoma market is around 791,000 homes (by contrast 17.2% of the NYC market is around 1.3 million homes). Here’s a list ranking the number of homes in each Nielsen market.