Portland-South Portland migration, mapped
In 2022–23, 20,223 people moved into the Portland metro and 18,086 moved out, a net of +2,137. Yellow arcs are people arriving, blue arcs are people leaving. Hover a dot to see the corridor, or click through to compare.
The map couldn’t load. The numbers below still tell the story.
† IRS methodology change in this year’s files (see methodology)
What the flows say
- Biggest published corridors: more arrivals come from Boston, MA-NH than anywhere else: 3,866 people in 2022–23. The top destination for leavers is Rest of Maine (2,909). The listed corridors cover about 61–62% of all flows; the totals count everyone.
- Trend: net inflow has cooled over the last three years, from +4,080 in 2020–21 to +2,137 in 2022–23†.
Population · 2025
577,635
▲ 0.7% year over year · growing
Peak population
577,635
highest in the series shown (since 2000)
Why the population is changing
- Growth driver: domestic migration added more people than anything else: +2,644 in 2025, ahead of births minus deaths (−922) and international migration (+2,430).
- Peak population: the 2025 estimate of 577,635 is the highest on record, in data going back to 2000.
Net income flow · 2022–23
+$303M
▲ $1.2B arrived · $905M left
Avg household income · movers
$89k in · $75k out
arrivals out-earn leavers by 19%
Portland wealth migration
- Money moved: households moving into the Portland metro in 2022–23 reported $1.2B in income (AGI). Households leaving took $905M with them, a net gain of $303M.
- Income gap: the average household moving in reported $89k of income, vs $75k for leavers. Arrivals out-earn leavers by 19%.
About the data
Corridors are IRS county-to-county migration flows added up into metro areas (2023 Census metro definitions; exemptions ≈ people). "Rest of" entries cover a state's counties outside any featured metro. The IRS hides corridors with fewer than 20 returns, so the lists here cover about 62% of inbound and 61% of outbound movers in 2022–23. The in, out, and net totals count everyone. Income figures are the total income (AGI) movers reported, from the complete county totals. Dollars are not adjusted for inflation, and household averages divide by the number of returns. Population figures are Census Bureau estimates; the peak covers records since 2000. Years marked † had a change in how the IRS built the files. Full details on the methodology page.
Download this data (CSV), free to use with attribution.
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