Portland-South Portland, ME Metro Area Immigration

Population

The Portland-South Portland Metropolitan Statistical Area (MSA) population 1/ increased from 327,556 in 1970 to 514,098 in 2010. That was an increase of 56.9 percent.

The foreign-born (FB) population increased from 13,868 in 1970 to 22,558 in 2010. That was an increase of 62.7 percent. The foreign-born share changed from 4.2 percent to 4.4 percent.

The share of the overall population that was native-born (NB) increased by 56.7 percent.

	Portland MSA: Population  1970-2010

Sources of Population Change

The primary sources of population change are:

Natural Change [Births minus Deaths or B-D];
Net Domestic Migration [NDM - movement between states]; and
Net International Migration [NIM - movement into and out of the country].
There is also a residual "other" amount that isn't placed in one of those three categories.

The first chart below shows the three population change factors for three periods adjusted for annual average amounts. Natural change (B-D) was the primary factor in population increase in the first period, replaced by NDM in the next two periods.

The second chart shows the same data but with an adjustment to reflect births to immigrants shifted to NIM. In it, NIM replaced B-D as the main source of added population in the most recent period.

	Portland MSA: Sources of Population Change 1990-2014 		Portland MSA: Sources of Population Change (Adjusted) 1990-2014

		B-D	 NDM	 NIM						 B-D	 NDM	 NIM	
	90-'99	60.6%	29.8%	 9.5%					90-'99	 56.7%	29.8%	13.5%
	00-'09	32.9%	53.0%	14.1%					00-'09	 30.1%	53.0%	16.9%
	10-'14	18.8%	45.6%	35.6%					10-'14	  3.6%	45.6%	50.8%

1/ Cumberland, Sagadahoc, and York counties.

Links:

MSA Factsheets by state, and alphabetically.

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