The best source of information on the population status of Bushtit is the Christmas Bird Count (CBC), which samples the Canadian range well and has high precision. The Breeding Bird Survey (BBS) is more standardized, but has lower precision and provides less coverage of the species, as there are relatively few routes within the Bushtit's limited Canadian range, and few individuals are counted each year, perhaps due to the species' minimal vocalizations during the breeding season. The CBC indicates a large long-term increase in abundance since the early 1970s. Although the BBS is less reliable for this species, the fact that it indicates a moderate decrease of 40% since 1970 reduces confidence in the assessment to medium.

The goal for Bushtit is to remain at or above its recent population level, based on the Christmas Bird Count. Trend data show that Bushtit is currently within its goal range.