Leaf was settled in 1838, and originally called "Salem". Most of the early settlers in the region were Irish, Scottish or English, and Salem's first families were the Thomsons, Cowarts, McKays, and McLeods.
Salem Academy was founded by W.W. Thompson, and operated between 1845 and 1862. Thompson later served as a Superintendent of Education of Greene County.
Leaf was a stop on the Mobile, Jackson and Kansas City Railroad, which later became the Illinois Central Railroad.
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 Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, 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.