The Canadian population of Townsend's Solitaire is monitored best by the Breeding Bird Survey (BBS), which estimates trends with high precision, although coverage of the northern part of the breeding range in Yukon and northern British Columbia is sparse. The national trend shows an increase through the 1970s, and somewhat of a decrease since around 2005, but with current abundance showing little change relative to 1970.  Although data are less reliable at regional levels, there appears to be some evidence of abundance increasing in the northern portion of the Canadian breeding range, while decreasing in southern British Columbia. The Christmas Bird Count likewise indicates little change relative to 1970. Although it is somewhat more difficult to interpret because it also reflects birds from the United States, the agreement with the BBS leads to overall high confidence in the reported trend.

The goal for Townsend's Solitaire is to remain at or above its average population level from 1970 to 2022, based on the Breeding Bird Survey. Recent data show that the population is within its goal range.