Limestone County was created on February 6, 1818 by the Alabama Territorial General Assembly and is named for the creek that flows through it [1]. It was formed from Chickasaw and Cherokee lands ceded to the United States in 1816, and early settlers came mainly from Tennessee, the Carolinas and Virginia. The seat is Athens, chosen in 1819, and the 2020 estimate was 103,570 residents across 559 square miles.
| Created | February 6, 1818 |
|---|---|
| Seat | Athens (chosen 1819) |
| Population, 2020 | 103,570 (estimate) |
| Area | 559 square miles |
| Median household income | $64,270 |
| Waterways | Tennessee and Elk rivers |
History
The county has had five courthouses since 1820, and the current one dates to 1919. Mooresville is Alabama’s oldest incorporated town and has its oldest operating post office [1].
Economy
Agriculture dominated until the twentieth century, with cotton the main cash crop by 1820. Textile mills followed, and hydropower from locks and dams on the Tennessee River and later TVA dams supported industry. Today space and technology industries are central, as part of the Huntsville-Decatur metro area. Education and health care employed 18.5 percent of workers in 2020 and manufacturing 18.2 percent [1]. See Tennessee Valley.
Education and attractions
The county has 13 primary and secondary schools, seven of them run by Athens City Schools, and Athens State University offers junior- and senior-level coursework. Attractions include Bayhill Village and Marina, the 10.3-mile Rails to Trails path in Elkmont, the 8,870-acre Swan Creek Wildlife Management Area, the Antebellum Trail and Founders Hall (1842) at Athens State. The Tennessee Valley Old Time Fiddlers Convention is held each October [1].
Formation and geography
Limestone County was established on February 6, 1818, by the Alabama Territorial legislature and is named for Limestone Creek. In 1821 its boundary was extended to include land east of the Elk River’s mouth on the Tennessee River that had been part of Lauderdale County. It covers 607 square miles, 560 of them land, making it the third smallest county in Alabama by land area.[2]
Population and growth
The county grew from 9,871 residents in 1820 to 103,570 in 2020, with especially rapid growth since 1990, and the Census Bureau’s 2025 estimate is 122,928. Athens is the county seat and largest city entirely within the county, with 25,406 people in 2020. Madison and Huntsville lie mostly in Madison County and Decatur mostly in Morgan County. The median age is 39.9.[2]
Transportation and neighbors
Huntsville International Airport is about 23 miles east, and CSX (north-south) and Norfolk Southern (east-west) freight lines serve the county. It adjoins Giles and Lincoln counties in Tennessee and Madison, Morgan, Lawrence and Lauderdale counties in Alabama.[2]
FAQs
When was it created? February 6, 1818.
What is the seat? Athens.
Sources
More in Human Geography
Key facts
- Population 103,5701
Quick checkHow did Limestone County get its name?Show answer
From a creek with a hard limestone bed.
Sources
- Encyclopedia of Alabama. Limestone County. n.d. (accessed 2026-11-10)
Editorially reviewed by Specialty Digest Editorial TeamLast reviewed November 10, 2026Researched and drafted with AI assistanceReport an issue