Founding year: Wikidata. First post office: 1834.The full story ↓
History grade
What drives Greenup’s History grade
On its age, its old homes and the National Register, Greenup is more historic than 92% of U.S. towns. All 3 inputs are above most U.S. towns; its National Register listings ranks highest and its share of homes from before 1940 lowest.
A
HistoryA character grade: shown, never part of Greenup’s overall grade.
Few Illinois towns list much on the Register (a typical Illinois town has 0.5 per 10,000 residents, the U.S. 2.4), so Greenup’s 170 sits above most of its state (96% of Illinois towns have fewer) while its 31 historic buildings outnumber those of 82% of U.S. towns.
NoteThe founding year comes from Wikidata alone; no second source gives 1834.
How sure. Graded on any two of the three inputs instead, the letter would range from A− to A. The pre-1940 share is a Census survey estimate (±7.5 points).
Founding year: Wikidata (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 Greenup’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Greenup received its name from National Road surveyor, William C. Greenup who platted the town in 1834. He was one of the supervisors hired to oversee construction of the National Road in Illinois, surveying the original alignment from Marshall to Vandalia during the 1830s.
Greenup was platted in 1834, and served as Cumberland County's first county seat from 1843 to 1855.
In 1834, according to Wikidata. Greenup’s post office opened in 1834.
How does Greenup rank for history?
Greenup is more historic than 92% 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.
What is on the National Register in Greenup?
One place: the Greenup Commercial Historic District (listed 1991).
How old are the homes in Greenup?
23% of Greenup’s homes were built before 1940 (Census estimate, ±7.5 points), against a typical 11% for an Illinois town; the median home was built in 1965.
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 (6), the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, 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.