Population Forecast
5 year Forecast - 3.9%
The current population of the Seattle-Bellingham, WA Market is 3,707,776 as of the January 2026 PopStats estimate. PopStat’s Trend models indicate a 5 year population change of 3.9%, resulting in a Population of 3,852,696 by January 2031. This percentage change in Population ranks 54th across STI Markets. The Seattle-Bellingham, WA Market currently ranks 22nd in overall population, and will rank 22nd by January 2031.
High and Low Range - 0.1% to 11.5%
While the summation of mid range 5 year forecasts foresee a change in Population of 3.9% for Seattle-Bellingham, WA Market. The forecast high ranges of these forecasts leaves open the possibility for a Population change as high as 11.5% at 4,133,758. Similarly a population change as low as 0.1% at 3,710,706 is not without possibility.
Figure 73: Population Trend and Forecast
10 year Projections - 8.4%
By January 2036 we project the Population of the Seattle-Bellingham, WA Market to be 4,017,979 resulting in a change of 8.4% compared to the current Population. This projected percentage change in Population ranks 54th across STI Markets. The Seattle-Bellingham, WA Market currently ranks 22nd in overall population, and will rank 22nd by January 2036.
