The best source of information on the population status of Lark Sparrow is the Breeding Bird Survey (BBS). It is highly suitable for this species, samples most of the breeding range, and the population trends have high precision. BBS data indicate a relatively stable population from the 1970s to mid-1990s, a fairly substantial increase from then until around 2010, and fluctuation around a relatively stable level ever since. There is some regional variability in trends, with the increase most notable in the core of the population in the southern Prairies, and less change in the Prairie-Parkland transition and in southern British Columbia. 

The goal for Lark Sparrow is to remain at or above its recent population level, based on the Breeding Bird Survey. Trend data show that Lark Sparrow is currently within its goal range.