County outline
Where Autauga County is located
Area breakdown
Land accounts for 98.4% of Autauga County’s measured area and water for 1.6%. Its combined area converts to 1,565.3 square kilometers or approximately 386,796 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 594.455 | 1,539.631 | 380,451.2 |
| Water | 9.914 | 25.677 | 6,345 |
| Total | 604.369 | 1,565.309 | 386,796.2 |
How Autauga County compares
By original Census land area, Autauga County ranks #55 of 67 in Alabama and #1645 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.885 times the Alabama county-equivalent median of 672.1 square miles. It accounts for 1.2% of the combined county land area in the state.
See the complete Alabama ranking · What counts as a county equivalent?
Population and density of Autauga County
The Census Bureau estimates that 61,920 people lived in Autauga County on July 1, 2025. That ranks #889 of 3,222 county equivalents nationally and #22 of 67 in Alabama. Since the April 1, 2020 estimates base of 58,805, the population has grown by 3,115 (+5.3%), compared with +3.3% for Alabama as a whole.
With 594.5 square miles of land, that is 104 people per square mile (40 per km²), placing Autauga County #958 nationally for density and #20 in Alabama. The median county equivalent has 47 people per square mile; the Alabama median is 49. Put another way, there are about 6.1 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 58,914 | 59,207 | 59,755 | 60,502 | 61,476 | 61,920 |
| Change | — | +293 | +548 | +747 | +974 | +444 |
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 Autauga County
4 incorporated places lie at least partly in Autauga County. Together they are home to 39,878 people (64.4%); the other 22,042 (35.6%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Prattville city, with 38,518 residents in the county (the city extends into 1 other county).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Prattville cityCounty seat · Also in 1 other county | 38,518 | +7.5% | 35.9 |
| Autaugaville town | 817 | +4.2% | 7.833 |
| Millbrook cityAlso in 1 other county | 414 | +4.3% | 14.4 |
| Billingsley town | 129 | −0.8% | 1.175 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Autauga County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Autauga County is a central county of the Montgomery, AL Metropolitan Statistical Area. Its 4 county equivalents have 388,747 residents on 2,714.4 square miles of land; Autauga County accounts for 21.9% of the land and 15.9% of the residents. By combined land it ranks #113 of 393 metropolitan areas, and #146 by population. It belongs to the Montgomery-Selma, AL Combined Statistical Area.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Montgomery County | 225,891 | 785.4 |
| Elmore County | 91,577 | 618.5 |
| Autauga County | 61,920 | 594.5 |
| Lowndes County | 9,359 | 716.1 |
ZIP codes
11 ZIP Code Tabulation Areas have land in Autauga County; 7 of them have most of their land inside the county, and the others mainly cover neighboring areas.
3600336006360083602236051360663606736091367033674936758
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 Autauga County
Autauga County shares a land border with 5 county equivalents. Each of them has more land than Autauga County. The largest neighbor is Dallas County (978.7 mi²) and the smallest is Elmore County (618.5 mi²). Together with its neighbors, Autauga County forms a block of 4,386 mi² of land, of which it holds 13.6%.
| Bordering county equivalent | Land mi² | Size vs. Autauga | Compare |
|---|---|---|---|
| Dallas County | 978.7 | 1.6× larger | Compare |
| Montgomery County | 785.4 | 1.3× larger | Compare |
| Lowndes County | 716.1 | 1.2× larger | Compare |
| Chilton County | 692.8 | 1.2× larger | Compare |
| Elmore County | 618.5 | about the same | Compare |
How big is Autauga County compared with U.S. states?
Autauga County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.7 times as much. Alabama’s county land could hold about 85 areas the size of Autauga County.
Another way to picture it: the same land area would fill a square about 24.4 miles (39.2 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 Autauga County?
Autauga County has more land than 1,577 of the other 3,221 county equivalents in the dataset.
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 Autauga County at #1,728 nationally by total area, 83 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 1.6%, compared with a national county-equivalent median of 1.2% — 0.5 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 Autauga County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1644 | Amador County, California | 594.6 | Compare |
| #1645 | Autauga County, Alabama | 594.5 | This county |
| #1646 | Linn County, Kansas | 594.1 | Compare |
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 32.532237, -86.646440. 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: 1,539,631,448 m²; AWATER: 25,677,530 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Autauga County?
Autauga County, Alabama has 594.5 square miles (1,539.6 km²) of land and 9.914 square miles of water, for a total area of 604.4 square miles. It ranks #1645 of 3,222 U.S. county equivalents by land area.
Is Autauga County the largest county in Alabama?
No. Autauga County ranks #55 of 67 in Alabama by land area. The largest is Baldwin County, with 1,589.9 square miles of land.
What counties border Autauga County?
Autauga County shares a land border with Chilton County, Dallas County, Lowndes County, Elmore County, and Montgomery County.
What is the population of Autauga County?
The Census Bureau estimates Autauga County had 61,920 residents on July 1, 2025, ranking #889 of 3,222 county equivalents. That is 104 people per square mile of land.
What is the county seat of Autauga County?
The county seat of Autauga County is Prattville.
What cities and towns are in Autauga County?
Autauga County has 4 incorporated places. The most populous are Prattville city, Autaugaville town, Millbrook city, and Billingsley town; 22,042 residents live outside any incorporated place.
Is Autauga County part of a metropolitan area?
Yes. It is a central county of the Montgomery, AL Metropolitan Statistical Area, which has 4 county equivalents and 388,747 residents.
How many ZIP codes are in Autauga County?
11 ZIP Code Tabulation Areas have land in Autauga County, and 7 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Autauga County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.7 times as much land.
How many acres of land are in Autauga County?
The land measurement converts to approximately 380,451 acres. Including water, total area is approximately 386,796 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.