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What are the largest counties in Alabama?

Jefferson County is the largest county in Alabama, with 665,742 residents in 2025 (Census PEP). Madison County (433,516) and Mobile County (411,658) come next.

Data as of 2025 · updated

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All 67 ranked Alabama counties

Alabama counties ranked by population
RankCountyResidents 2025Change 2020–25
1Jefferson County665,742−1.3%
2Madison County433,516+11.0%
3Mobile County411,658−0.7%
4Baldwin County267,761+14.8%
5Tuscaloosa County241,368+3.8%
6Shelby County238,552+6.5%
7Montgomery County225,891−1.1%
8Lee County189,881+8.6%
9Morgan County126,483+2.6%
10Limestone County122,928+18.0%
11Calhoun County115,834−0.3%
12Houston County110,318+2.8%
13Etowah County103,886+0.4%
14Marshall County103,537+6.0%
15St. Clair County98,206+7.1%
16Lauderdale County97,135+3.3%
17Cullman County94,009+6.7%
18Elmore County91,577+4.2%
19Talladega County81,603+0.3%
20DeKalb County74,085+3.4%
21Walker County65,140−0.0%
22Autauga County61,920+5.1%
23Blount County60,156+1.8%
24Colbert County59,474+3.8%
25Russell County58,898−0.6%
26Coffee County56,953+6.3%
27Jackson County54,281+3.3%
28Dale County49,912+1.3%
29Chilton County47,708+5.9%
30Tallapoosa County40,953−0.8%
31Covington County37,947+1.2%
32Escambia County36,665−0.1%
33Dallas County35,140−8.0%
34Chambers County34,253−0.9%
35Lawrence County33,843+2.3%
36Pike County33,688+2.4%
37Franklin County32,449+1.1%
38Marion County29,097−0.3%
39Geneva County27,554+3.2%
40Cherokee County26,413+5.7%
41Barbour County24,607−1.4%
42Winston County23,829+1.4%
43Randolph County23,163+4.8%
44Bibb County22,262+0.4%
45Clarke County22,014−4.2%
46Monroe County18,965−3.8%
47Henry County18,394+7.1%
48Marengo County18,311−5.0%
49Pickens County18,221−3.9%
50Macon County18,132−6.8%
51Butler County18,100−4.8%
52Cleburne County15,970+6.0%
53Fayette County15,872−2.8%
54Hale County15,194+2.9%
55Washington County14,822−3.3%
56Clay County14,207−0.1%
57Lamar County13,587−2.6%
58Crenshaw County13,175+0.0%
59Choctaw County11,904−5.7%
60Sumter County11,588−5.0%
61Conecuh County10,899−5.7%
62Coosa County10,161−1.7%
63Bullock County9,780−4.5%
64Wilcox County9,666−8.3%
65Lowndes County9,359−9.0%
66Perry County7,425−12.2%
67Greene County7,067−8.2%

How this is ranked

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built.

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Questions

What is the largest county in Alabama?

Jefferson County is the largest county in Alabama, with 665,742 residents in 2025 (Census PEP). Madison County (433,516) and Mobile County (411,658) come next.

How is this ranking calculated?

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

More rankings for Alabama

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