Wikipedia doesn’t have a history of Loudon Township yet. The photos, dates and memories neighbors add here are how it gets written.
Loudon Township is one of twenty townships in Fayette County, Illinois, USA. As of the 2020 census, its population was 881 and it contained 394 housing units.
Between the 2010 and 2020 censuses its population fell from 954 to 881 (-8%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Loudon Township, 1832 to 1941
Woven from the archive, old maps, post office records, the National Register and the people born here.
Every edition of the U.S. Geological Survey’s map of Loudon Township. Tap a year, or press play to watch the town change.
1941St Elmo sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Loudon Township.
People over time
Loudon Township, census by census
Between 661 and 954 people in every census since 2000.
3 censuses, 2000–2020.
U.S. Census Bureau decennial counts, from the census table on Loudon Township’s Wikipedia page.
Stories next door
History across the town line
Each neighbor’s History grade, on the same three inputs.
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). How TownRatings grades history →
From 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.