The best source of information on the population status of Solitary Sandpiper appears to be the Breeding Bird Survey (BBS). Although coverage is limited in the northern parts of the breeding range, precision of the BBS is high, and overall reliability is medium. The national BBS trend indicates a moderate long-term increase in abundance since the early 1970s, mostly occurring since the late 1980s. Increases have occurred in all Canadian Bird Conservation Regions where reliability of the BBS is at least medium. In contrast, continental trends based on migration monitoring by the Program for Regional and International Shorebird Monitoring (PRISM) show a moderate decrease over a slightly shorter time frame, but their reliability is considered slightly lower because the sampling sites are typically not optimal for this species. Because both sources fall in the range of medium reliability, the conflicting evidence reduces confidence in the BBS-based trend to low.

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