15% of Sparta Township’s homes were built before 1940
More historic than 78% of U.S. towns · #135 of 468 in New Jersey. What drives it
1 place in town is on the National Register, among them a historic district with 18 buildings. Below: 1 old photo or paper, maps from 1888 on, and the census since 1850.
On its age, its old homes and the National Register, Sparta Township is more historic than 78% of U.S. towns, #135 of 468 in New Jersey. All 2 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 Sparta Township’s overall grade.
New Jersey towns list more on the Register than most of the country (a typical New Jersey town has 3.7 per 10,000 residents, the U.S. 2.4), so Sparta Township’s 9.0 sits above most of its state (67% of New Jersey towns have fewer) while its 18 historic buildings outnumber those of 79% of U.S. towns.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share is a Census survey estimate (±3.5 points).
Founding year: our sources. 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 Sparta Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Sparta was originally inhabited by Lenape Native Americans. In the 1750s, Dutch explorers discovered red ores in the area and attempted to mine copper. No permanent settlers arrived until 1778, when Robert Ogden and his wife built their home and constructed an iron forge on lands he had acquired and "called their house and farm Sparta." The first public building in Sparta was the Presbyterian Church which was incorporated in 1786. Schools were established in Ogdensburg by 1806 and in Sparta by 1812.
Every edition of the U.S. Geological Survey’s map of Sparta Township. Tap a year, or press play to watch the town change.
1888Franklin 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 Sparta Township.
Then & now
Stand where they stood
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Retake this viewLadies school near Sparta, 1820
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Sparta Township’s page.
Sparta Township is more historic than 78% of U.S. towns, #135 of 468 in New Jersey. 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 Sparta Township?
One place: the White Deer Plaza and Boardwalk District (listed 1988).
How old are the homes in Sparta Township?
15% of Sparta Township’s homes were built before 1940 (Census estimate, ±3.5 points), against a typical 15% for a New Jersey town; the median home was built in 1974.
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 the Library of Congress (3), Wikidata (1), the National Register of Historic Places (1), 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.
2017
2017
