Petersburg Borough, Alaska Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 21st-largest in Alaska
The population of Petersburg Borough, Alaska is 3,394 as of the 2023 American Community Survey, making it the 21st-largest county in Alaska. The median household income is $77,026, the median home value is $301,300, and the median age is 45.7.
The population of Petersburg Borough has grown 6.7% since 2010 (3,219 → 3,436), a +0.47% annualized rate.
3,394
Population
+0.47%
Annual growth
1
People / sq mi
$77,026
Median Income
$301,300
Median Home Value
Petersburg Borough covers 2,901 sq mi of land at 1.2 people per square mile.
About Petersburg Borough, AK
Petersburg Borough stands apart on settlement density — it is among the most sparsely settled of US counties, at roughly 1 people per square mile. Petersburg Borough is a county in Alaska with a population of 3,394. It ranks #21 among counties in Alaska by population.
Households take in a median $77,026, comfortably near the US median of $78,538. Hardship is rare relative to US counties: a poverty rate of just 4.3%, below the national 12.4%. A typical home is worth $301,300, with typical rent around $1,208.
College attainment is above the local norm at 27.5%, below the national 35.0%. Remote work is below the national 14.0% at 7.4%, and the average commute runs about 7 minutes each way.
Petersburg Borough Population History (2010-2024)
The county of Petersburg Borough had a population of 3,219 in 2010 and 3,436 in 2024, a 6.7% growth over 14 years. The peak was 3,436 in 2024. Average annual growth rate: 0.47%.
3,436
Population (2024)
3,219
Population (2010)
3,436
Peak (2024)
0.47%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 3,219 |
| 2011 | 3,255 |
| 2012 | 3,276 |
| 2013 | 3,288 |
| 2014 | 3,256 |
| 2015 | 3,251 |
| 2016 | 3,262 |
| 2017 | 3,284 |
| 2018 | 3,256 |
| 2019 | 3,294 |
| 2020 | 3,407 |
| 2021 | 3,385 |
| 2022 | 3,381 |
| 2023 | 3,431 |
| 2024 | 3,436 |
Race & Ethnicity
| White | 61.7% |
| Black or African American | 1.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 15.0% |
| Two or More Races | 0.4% |
Age & Sex
45.7
Median Age
50.0%
Female
50.0%
Male
22.0%
Age 65+
Age Distribution
Children (under 15): 16.2% · Seniors (65+): 22.0%
Income & Poverty
| Median household income | $77,026$-12,310 vs state |
| Mean household income | $98,129 |
| Per-capita income | $42,380 |
| Poverty rate | 4.3%-2.5% vs state |
| Unemployment rate | 2.7% |
| Employment-to-population | 61.4% |
Top Industries by Employment
The largest employment sector in Petersburg Borough is professional & business services, accounting for 24.1% of workers.
How residents commute
0.2%
Drive alone
21.0%
Carpool
52.2%
Public transit
7.4%
Work from home
7.1 min
Avg commute
Housing
$301,300$-32,000 vs state
Median home value
$1,208
Median rent
71.0%
Homeownership rate
1,871
Total housing units
70.5%
Occupied
29.5%
Vacant
29.0%
Renter-occupied
Social & access
89.1%
With health insurance
94.1%
With broadband internet
47.0%
Foreign-born
6.5%
Veterans (18+)
16.1%
With a disability
82.8%
Speak language other than English at home
Education
90.6%
High School+
27.5%
Bachelor's+
Largest cities in Alaska
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County rankings
Frequently Asked Questions
Petersburg Borough, Alaska has a population of 3,394 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 21st-largest county in Alaska. Population density is 1 people per square mile.
The population of Petersburg Borough has grown 6.7% since 2010 (3,219 → 3,436), a +0.47% annualized rate.
The median household income in Petersburg Borough, Alaska is $77,026, with mean (average) household income of $98,129 and per-capita income of $42,380. 4.3% of residents live below the federal poverty level.
In Petersburg Borough, the largest racial and ethnic groups are White (61.7%), Hispanic or Latino (15.0%), Black or African American (1.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Petersburg Borough, Alaska is 45.7 years. Residents are 50.0% female and 50.0% male.
The median home value in Petersburg Borough is $301,300 and median monthly rent is $1,208. 71.0% of occupied housing units are owner-occupied. The county has 1,871 total housing units, 29.5% of which are vacant.
The largest employment sector in Petersburg Borough, Alaska is professional, scientific, and management services, employing 24.1% of workers. The unemployment rate is 2.7%.
Anchorage is among the largest cities associated with Petersburg Borough, Alaska, with a population of 289,069.
Petersburg Borough, AK Climate
Petersburg Borough, AK has an average annual temperature of 3.8°C (39°F) and receives about 2722 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
3.8°C
Avg Temp
2722
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 26° | 272 mm |
| February | -2° / 29° | 212 mm |
| March | -1° / 30° | 190 mm |
| April | 3° / 37° | 155 mm |
| May | 7° / 44° | 152 mm |
| June | 10° / 50° | 133 mm |
| July | 12° / 53° | 141 mm |
| August | 12° / 53° | 193 mm |
| September | 9° / 47° | 298 mm |
| October | 4° / 39° | 404 mm |
| November | -1° / 31° | 292 mm |
| December | -3° / 27° | 280 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Petersburg Borough, AK
The most comfortable months to visit Petersburg Borough, AK are typically July, June and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 15°C high). The coldest is January (near -6°C low). October is usually the wettest month.
Where to stay near Petersburg Borough
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Population, race, income, age, and trends across Alaska
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.