The Clay post office opened in 1878, the earliest record of the town by name. Three smaller post offices, Taylor's (1847), Ayres (1878) and Chalkville (1888), opened inside today’s city and later closed.
First census: 10,987 in 19902020 census: 10,291148 years
How historic is Clay?
C−
More historic than 19% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Clay post office (Blevins & Helbock, CC0).
History grade
What drives Clay’s History grade
On its age, its old homes and the National Register, Clay is more historic than 19% of U.S. towns, #125 of 187 in Alabama. Its age holds the grade up; its share of homes from before 1940 pulls it down.
C−
HistoryA character grade: shown, never part of Clay’s overall grade.
Alabama towns list about as much on the Register as the country (a typical Alabama town has 2.7 per 10,000 residents, the U.S. 2.4), so Clay’s 0.0 sits below most of its state (26% of Alabama towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would still be C−. The pre-1940 share (±2.8 points) is firm at this size. The founding year is the first post office, not a stated founding date.
Founding year: the first post office (other dates in Quick answers). Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Clay’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost half of its people between 1990 and 2000, then more than doubled.
4 censuses, 1990–2020.
U.S. Census Bureau decennial counts, from the census table on Clay’s Wikipedia page.
The story so far
Clay, in brief
Wikipedia doesn’t have a history of Clay yet. The photos, dates and memories neighbors add here are how it gets written.
Clay is a city in northeastern Jefferson County, Alabama, United States. It is part of the Birmingham–Hoover–Cullman Combined Statistical Area in the north-central part of the state. Local government is run by a mayor and city council. As of the 2020 census, Clay had a population of 10,291. Before incorporation on June 6, 2000, it was a census-designated place (CDP). The oldest church in Jefferson County, Mount Calvary Presbyterian Church, is located in Clay. The congregation has been meeting continually since 1806, when it was established by early Scots-American settlers. On January 23, 2012, a total of 231 homes and businesses were either damaged or destroyed when an EF3 tornado passed th…
Its first post office opened in 1878. Between the 2010 and 2020 censuses its population grew from 9,708 to 10,291 (+6%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Clay, 1847 to 1995
Woven from the archive, old maps, post office records, the National Register and the people born here.
The Clay post office opened in 1878, the earliest record of the town by name (U.S. post office records).
How does Clay rank for history?
Clay is more historic than 19% of U.S. towns, #125 of 187 in Alabama. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
How old are the homes in Clay?
3% of Clay’s homes were built before 1940 (Census estimate, ±2.8 points), against a typical 3.2% for an Alabama town; the median home was built in 1994.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021).
From Wikimedia Commons (2), Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.