Each edition grades its towns against each other only.
More historic than 41% of U.S. towns. What drives it
Below: 1 old photo or paper, maps from 1969 on, and the census since 1890.
The Sloan post office opened in 1869, the earliest record of the town by name. Another post office, Hamlin (1867), opened inside today’s city and later closed.
More historic than 41% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Sloan is more historic than 41% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
Iowa towns list more on the Register than most of the country (a typical Iowa town has 9.1 per 10,000 residents, the U.S. 2.4), so Sloan’s 0.0 sits below most of its state (17% of Iowa towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
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 →
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how Sloan’s history is told.
From Wikipedia’s history of Sloan.
Sloan was platted in 1870 by the president of the Sioux City & Pacific Railway. The city was named for Samuel Sloan, a railroad official.
Text from Wikipedia, licensed CC BY-SA 4.0.
Woven from the archive, old maps, post office records, the National Register and the people born here.
One decade in the archive so far: the 1960s. Scroll each row; tap a photo for its story.
Every edition of the U.S. Geological Survey’s map of Sloan. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Sloan.
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Sloan’s page.
Retake this view · +15Grew from 449 people in 1890 to 1,042 in 2020.
14 censuses, 1890–2020.
U.S. Census Bureau decennial counts, from the census table on Sloan’s Wikipedia page.
Sloan’s post office has been open since 1869. Another post office, Hamlin, opened and closed inside today’s town.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
The Sloan post office opened in 1869, the earliest record of the town by name (U.S. post office records).
Sloan is more historic than 41% of U.S. towns. 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.
24% of Sloan’s homes were built before 1940 (Census estimate, ±9.1 points), against a typical 22% for an Iowa town; the median home was built in 1968.
What the archives can’t tell you, neighbors can.
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 (4), Wikipedia, 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.
2018
2018
2004