Bristol Bay Borough area

Bristol Bay Borough, Alaska covers 849 square miles: 481.4 square miles of land and 367.6 square miles of water. Its county seat is Naknek. An estimated 847 people lived there in 2025.

Official Census measurements · GEOID 020602026 Gazetteer · retrieved September 27, 2026
Land area481.4 mi²
Water area367.6 mi²
Population (2025)847
People per mi²1.8

County outline

Generalized outline of Bristol Bay Borough, Alaska
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Bristol Bay Borough is located

Bristol Bay Borough highlighted on a map of all U.S. county equivalents. Alaska is shown at 35% of the common scale. About the maps

Area breakdown

Land accounts for 56.7% of Bristol Bay Borough’s measured area and water for 43.3%. Its combined area converts to 2,198.9 square kilometers or approximately 543,366 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land481.3821,246.774308,084.5
Water367.627952.15235,281.3
Total849.0092,198.923543,365.8

How Bristol Bay Borough compares

By original Census land area, Bristol Bay Borough ranks #29 of 30 in Alaska and #2152 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 0.064 times the Alaska county-equivalent median of 7,486.4 square miles. It accounts for 0.1% of the combined county land area in the state.

See the complete Alaska ranking · What counts as a county equivalent?

Population and density of Bristol Bay Borough

The Census Bureau estimates that 847 people lived in Bristol Bay Borough on July 1, 2025. That ranks #3,192 of 3,222 county equivalents nationally and #29 of 30 in Alaska. Since the April 1, 2020 estimates base of 841, the population has grown by 6 (+0.7%), compared with +0.5% for Alaska as a whole.

With 481.4 square miles of land, that is 1.8 people per square mile (0.68 per km²), placing Bristol Bay Borough #3,088 nationally for density and #10 in Alaska. The median county equivalent has 47 people per square mile; the Alaska median is 0.73. Put another way, there are about 364 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate827841878847865847
Change—+14+37−31+18−18

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Bristol Bay Borough

Bristol Bay Borough has no incorporated cities, towns or villages. All 847 of its residents live in unincorporated communities, which the Census Bureau describes as census-designated places rather than municipalities.

Metropolitan area

Bristol Bay Borough is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.

ZIP codes

3 ZIP Code Tabulation Areas have land in Bristol Bay Borough; 2 of them have most of their land inside the county, and the others mainly cover neighboring areas.

996139963399670

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Bristol Bay Borough

Bristol Bay Borough shares a land border with 1 county equivalent. Lake and Peninsula Borough has 49.6 times its land area.

Map of Bristol Bay Borough and the 1 county equivalent that border it Lake and Peninsula Borough, Alaska: 23,896.5 mi² land
Bristol Bay Borough (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection; Alaska is shown at reduced scale. How borders are determined.
Bordering county equivalentLand mi²Size vs. Bristol BayCompare
Lake and Peninsula Borough23,896.549.6× largerCompare

How big is Bristol Bay Borough compared with U.S. states?

Bristol Bay Borough has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.1 times as much. Alaska’s county land could hold about 1,187 areas the size of Bristol Bay Borough.

Land area: Bristol Bay Borough and the closest-sized states
Bristol Bay Borough481.4 mi²
Rhode Island1,033.9 mi²

Another way to picture it: the same land area would fill a square about 21.9 miles (35.3 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Bristol Bay Borough?

Bristol Bay Borough has more land than 1,070 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Bristol Bay Borough481.4 mi²
Alaska median7,486.4 mi²
National median604.5 mi²

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Bristol Bay Borough at #1,089 nationally by total area, 1,063 places closer to the top than its land rank. The water assigned to this geography moves it ahead of some county equivalents with more land.

Its water share is 43.3%, compared with a national county-equivalent median of 1.2% — 42.1 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Bristol Bay Borough in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#2151Door County, Wisconsin481.9Compare
#2152Bristol Bay Borough, Alaska481.4This county
#2153Tattnall County, Georgia480.8Compare

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.

Representative coordinates

The Census internal point is 58.730546, -156.994473. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.

Source and precision

U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 1,246,773,234 m²; AWATER: 952,149,167 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Bristol Bay Borough?

Bristol Bay Borough, Alaska has 481.4 square miles (1,246.8 km²) of land and 367.6 square miles of water, for a total area of 849 square miles. It ranks #2152 of 3,222 U.S. county equivalents by land area.

Is Bristol Bay Borough the largest county in Alaska?

No. Bristol Bay Borough ranks #29 of 30 in Alaska by land area. The largest is Yukon-Koyukuk Census Area, with 145,767.5 square miles of land.

What counties border Bristol Bay Borough?

Bristol Bay Borough shares a land border with Lake and Peninsula Borough.

What is the population of Bristol Bay Borough?

The Census Bureau estimates Bristol Bay Borough had 847 residents on July 1, 2025, ranking #3,192 of 3,222 county equivalents. That is 1.8 people per square mile of land.

What is the county seat of Bristol Bay Borough?

The county seat of Bristol Bay Borough is Naknek.

Is Bristol Bay Borough part of a metropolitan area?

No. Bristol Bay Borough is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.

How many ZIP codes are in Bristol Bay Borough?

3 ZIP Code Tabulation Areas have land in Bristol Bay Borough, and 2 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Bristol Bay Borough compare with U.S. states?

It has less land than every state. Rhode Island, the smallest, has 2.1 times as much land.

How many acres of land are in Bristol Bay Borough?

The land measurement converts to approximately 308,084 acres. Including water, total area is approximately 543,366 acres. One square mile equals 640 acres.

Why might another source show a different area?

Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.

Can this establish a property boundary?

No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.

Cite this county

Download the complete CSV or JSON dataset