By now, the region's population has eclipsed the 4 million mark
With the addition of 86,320 people in the past year (a 2.2 percent year-over-year increase), population in the central Puget Sound region reached 3,985,040.
In its Puget Sound Trends report, Puget Sound Regional Council noted the growth spurt marked the biggest population gain this century. It was also the highest growth rate in the past 20 years. Every county grew, led by King (home to 52,300 new residents) and Snohomish (home to 15,260 newcomers).
PSRC noted the region's pace of growth in 2015-2016 is not unprecedented, and in fact marked the fifth time since 1960 when the region added more than 80,000 people over the course of a year. Also noteworthy is the 5 percent rate of growth in the late 1960s -- twice the rate the region just experienced. There have been only four years in the past 56 when the region's population did not increase (the early '70s during the "Boeing Bust").