Most of Denmark Township was built recently: 8% of its homes predate 1940 and the median home dates from 1991. Its Register listing is the District No. 34 School. Its Register listing is the District No. 34 School.
The Denmark Township post office opened in 1878, the earliest record of the town by name. Three smaller post offices, Lake Saint Croix (1840), Point Douglas (1850) and Denmark (1878), opened inside today’s town and later closed.
2020 census: 1,801148 years
How historic is Denmark Township?
B−
More historic than 51% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Denmark Township post office (Blevins & Helbock, CC0).
History grade
What drives Denmark Township’s History grade
On its age, its old homes and the National Register, Denmark Township is more historic than 51% of U.S. towns. Its National Register listings hold the grade up; its age pulls it down.
B−
HistoryA character grade: shown, never part of Denmark Township’s overall grade.
Minnesota towns list about as much on the Register as the country (a typical Minnesota town has 2.1 per 10,000 residents, the U.S. 2.4), so Denmark Township’s 15.9 sits above most of its state (81% of Minnesota towns have fewer) while its 3 historic buildings outnumber those of 65% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from C to B. The pre-1940 share is a Census survey estimate (±3.7 points). The founding year is the first post office, not a stated founding date.
Founding year: the first post office (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 Denmark Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners, places now gone and burying grounds
Three other post offices opened and closed inside today’s town.
Lake Saint Croix
1840–1850
Point Douglas
1850–1903
Denmark
1878–1901
18401930today
Hamlets and corners on the map
Basswood GrovePoint Douglas
Gone or out of use
Point Douglas Post Officepost office
4cemeteries and burying grounds inside Denmark Township
EvergreenJohnsonLeavittSaint Mary's Episcopal
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
The story so far
Denmark Township, in brief
Wikipedia doesn’t have a history of Denmark Township yet. The photos, dates and memories neighbors add here are how it gets written.
Denmark Township is a township in Washington County, Minnesota, United States. The population was 1,801 at the 2020 census. The unincorporated community of Basswood Grove is located within Denmark Township. Denmark Township was organized in 1858.
Its first post office opened in 1878. Between the 2010 and 2020 censuses its population grew from 1,737 to 1,801 (+4%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Denmark Township, 1840 to 1903
Woven from the archive, old maps, post office records, the National Register and the people born here.
The Denmark Township post office opened in 1878, the earliest record of the town by name (U.S. post office records).
How does Denmark Township rank for history?
Denmark Township is more historic than 51% 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 Denmark Township?
One place: the District No. 34 School (listed 2014).
How old are the homes in Denmark Township?
8% of Denmark Township’s homes were built before 1940 (Census estimate, ±3.7 points), against a typical 8.1% for a Minnesota 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 Wikidata (1), the National Register of Historic Places (1), 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.
