Warren Township dates to 1850, and 1 of its places is on the National Register
More historic than 28% of U.S. towns · #570 of 768 in Illinois. What drives it
Most of Warren Township was built recently: 2% of its homes predate 1940 and the median home dates from 1991. Its Register listing is the Church of the St. Sava Serbian Orthodox Monastery. Below: maps from 1906 on.
Founding year: Wikipedia. First post office: 1847.
History grade
What drives Warren Township’s History grade
On its age, its old homes and the National Register, Warren Township is more historic than 28% of U.S. towns, #570 of 768 in Illinois. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
C
HistoryA character grade: shown, never part of Warren Township’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 Warren Township’s 0.2 sits near the middle of its state (57% of Illinois towns have fewer) while its 1 listings outnumber those of 51% of U.S. towns.
NoteThe founding year comes from Wikipedia alone; no second source gives 1850.
How sure. Graded on any two of the three inputs instead, the letter would range from C− to C+. The pre-1940 share (±0.5 points) is firm at this size.
Founding year: Wikipedia (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 Warren Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Druce Lake SchoolschoolGages Lake CampgroundlocaleStafford Schoolschool
3cemeteries and burying grounds inside Warren Township
Highland Memorial ParkSaint Sava MonasterySerbian Monastery
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Warren Township on the map, 1906 to 1993
Every edition of the U.S. Geological Survey’s map of Warren Township. Tap a year, or press play to watch the town change.
1906Waukegan 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 Warren Township.
The story so far
Warren Township, in brief
Wikipedia doesn’t have a history of Warren Township yet. The photos, dates and memories neighbors add here are how it gets written.
Warren Township is a township in Lake County, Illinois, USA. As of the 2020 census, its population was 65,883. The cities of Gurnee, Park City, and Grayslake lie within its borders. The township was established in 1850 by settlers who came from the town of Warren, New York. Both were named in honor of Major General Joseph Warren, killed at the Battle of Bunker Hill.
Warren Township was established in 1850. Its population held steady between the last two censuses: 64,841 in 2010, 65,883 in 2020.
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Warren Township, 1847 to 1931
Woven from the archive, old maps, post office records, the National Register and the people born here.
In 1850, according to Wikipedia’s history of the town. Warren Township’s post office opened in 1847.
How does Warren Township rank for history?
Warren Township is more historic than 28% of U.S. towns, #570 of 768 in Illinois. 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 Warren Township?
One place: the Church of the St. Sava Serbian Orthodox Monastery (listed 1979).
How old are the homes in Warren Township?
2% of Warren Township’s homes were built before 1940 (Census estimate), against a typical 11% for an Illinois town; the median home was built in 1991.
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 National Register of Historic Places (1), 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.
