The Semipalmated Plover breeds across much of boreal, subarctic, and Arctic North America, and in small numbers at scattered locations in Atlantic Canada. The wintering range of this species is broad, spanning coastal areas from the United States to southern South America. The Canadian breeding population is estimated at approximately 960,000 individuals based on recent analysis of data from the Arctic Program for Regional and International Shorebird Monitoring (PRISM). This is nearly five times higher than the previous global estimate, but likely reflects improved methods rather than an increase in abundance. Although continental and global estimates have not yet been formally updated, this means that the North American population is likely around 1.1 million individuals, and the global population around 1.2 million individuals, given that relative abundance models from eBird suggest that 77% of the global population breeds in Canada, and another 15% in Alaska, making the cumulative responsibility for Canada very high. The Canadian population of Semipalmated Plover has shown a moderate decrease relative to 1970. Confidence in this assessment is medium because migration monitoring by PRISM has high precision but likely provides only moderate coverage of the population. The national population of Semipalmated Plover is below its goal range.