Seattle-Tacoma-Bellevue, WA MSA Regional Analytics

Seattle-Tacoma-Bellevue, WA MSA Regional Analytics
-- Population & Components of Change; 2010-15

Components of Change: 7/1/2010-6/30/2015

Natural Change	110,506
equals Births	227,757
less Deaths	117,251
Net Migration	173,717
equals net International Migration	96,664
plus net Domestic Migration	77,053

The population of the Seattle-Tacoma-Bellevue, WA MSA changed from 3,448,636 on 2010 to 3,733,580 in 2015 -- a change of 284,944 (8.26%). This report provides a summary of how and why the population has changed during this period and what these factors suggest about future change.

Primary Contributing Factors to Change
The primary contributing factors resulting in population change are 1) natural change (births less deaths) and/or 2) net migration. Eight tables are presented below providing annual data for each component county of the metro and metro summary. The tables provide data on the total population, births, deaths, natural change (births less deaths), international migration, domestic migration and net migration.

From 2010 to 2015 (7/1/2010-6/30/2015), net migration (173,717) exceeded natural change (110,506); net migration has been the primary contributing factor for the metro population change. Examine the metro by county tables below to learn about how each county contributes to the metro population growth or decline.

Data Analytics Lab Sessions
Join in the weekly Data Analytics Lab sessions (Tuesdays, 3:00 pm ET) where we review demographic-economic characteristics and patterns for wide-ranging geography and updates/extensions to data provided here. No fee, no registration, see connectivity details.

Related Sections
• Seattle-Tacoma-Bellevue, WA MSA S&O Report
• State of the States -- all states interactive table
• Metro S&O Reports -- all metros interactive table
• CountyTrends 2010-2015 -- all counties interactive table
• CountyTrends -- multi-sourced county data
• Regional Data Analytics Main

Table 1. Population
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Chg 10-15	%Chg 10-15
King County, WA	53033	P0000001	1,937,699	1,972,548	2,009,200	2,047,618	2,082,288	2,117,125	179,426	9.26
Pierce County, WA	53053	P0000001	795,422	803,320	811,987	819,336	831,161	843,954	48,532	6.10
Snohomish County, WA	53061	P0000001	715,515	722,494	732,844	746,008	759,417	772,501	56,986	7.96
Total		P0000001	3,448,636	3,498,362	3,554,031	3,612,962	3,672,866	3,733,580	284,944	8.26
Table 2. Births
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Sum11-15
King County, WA	53033	B0000001	25,208	24,508	24,476	25,152	25,198	25,678	125,012
Pierce County, WA	53053	B0000001	10,672	10,849	11,442	10,968	11,523	11,533	56,315
Snohomish County, WA	53061	B0000001	9,440	8,952	8,903	9,342	9,550	9,683	46,430
Total		B0000001	45,320	44,309	44,821	45,462	46,271	46,894	227,757
Table 3. Deaths
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Sum11-15
King County, WA	53033	D0000001	11,316	12,146	11,967	12,487	12,857	12,964	62,421
Pierce County, WA	53053	D0000001	5,432	5,780	5,725	5,865	6,372	6,508	30,250
Snohomish County, WA	53061	D0000001	3,908	4,715	4,702	4,862	5,079	5,222	24,580
Total		D0000001	20,656	22,641	22,394	23,214	24,308	24,694	117,251
Table 4. Natural Change
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Sum11-15
King County, WA	53033	NC000001	13,892	12,362	12,509	12,665	12,341	12,714	62,591
Pierce County, WA	53053	NC000001	5,240	5,069	5,717	5,103	5,151	5,025	26,065
Snohomish County, WA	53061	NC000001	5,532	4,237	4,201	4,480	4,471	4,461	21,850
Total		NC000001	24,664	21,668	22,427	22,248	21,963	22,200	110,506
Table 5. International Migration
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Sum11-15
King County, WA	53033	MI000001	10,376	12,659	13,022	14,285	16,249	16,269	72,484
Pierce County, WA	53053	MI000001	1,924	1,418	2,830	2,162	2,271	2,492	11,173
Snohomish County, WA	53061	MI000001	1,848	2,197	2,482	2,544	2,868	2,916	13,007
Total		MI000001	14,148	16,274	18,334	18,991	21,388	21,677	96,664
Table 6. Domestic Migration
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Sum11-15
King County, WA	53033	MD000001	1,700	10,052	10,895	11,485	6,891	5,965	45,288
Pierce County, WA	53053	MD000001	-6,668	1,551	211	-139	4,265	4,794	10,682
Snohomish County, WA	53061	MD000001	1,480	435	3,643	5,957	5,990	5,058	21,083
Total		MD000001	-3,488	12,038	14,749	17,303	17,146	15,817	77,053
Table 7. Net Migration
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Sum11-15
King County, WA	53033	MN000001	12,076	22,711	23,917	25,770	23,140	22,234	117,772
Pierce County, WA	53053	MN000001	-4,744	2,969	3,041	2,023	6,536	7,286	21,855
Snohomish County, WA	53061	MN000001	3,328	2,632	6,125	8,501	8,858	7,974	34,090
Total		MN000001	10,660	28,312	33,083	36,294	38,534	37,494	173,717
Table 8. Group Quarters
Area Name	GeoID	Item	2010	2011	2012	2013	2014	2015	Chg10-15	%Chg 10-15
King County, WA	53033	GQ000001	37,119	37,660	37,667	37,887	38,139	38,070	951	2.56
Pierce County, WA	53053	GQ000001	17,952	16,861	16,832	16,729	16,685	16,581	-1,371	-7.64
Snohomish County, WA	53061	GQ000001	10,398	10,372	10,325	10,393	10,470	10,376	-22	-0.21
Total		GQ000001	65,469	64,893	64,824	65,009	65,294	65,027	-442	-0.68

Source: developed by ProximityOne based on Census Bureau and other data.
-- http://proximityone.com (888.364.7656)