Michigan

Allegan

120,502
2020 population
1840
first census record
19
census records

About Allegan

Allegan, Michigan, first appears in the United States federal census in 1840, when it recorded a population of 1,783. At the most recent census, in 2020, its population stood at 120,502.

The county's recorded population has risen across the decades to its highest level in 2020.

On the ground today, 35 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020120,502
2010111,408
2000105,665
199090,509
198081,555
197066,575
196057,729
195047,493
194041,839
193038,974
192037,540
191039,819
190038,812
189038,961
188037,815
187032,105
186016,087
18505,125
18401,783
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Historic places in Allegan

National Register of Historic Places listings in Allegan, Michigan.

Lilly, Augustus, House
Allegan
Brown, William H., House
Allegan
Douglas Union School
Douglas
Michigan Paper Company Mill Historic District
Plainwell
Old Wing Mission
Fillmore
Messenger, William C., House
Allegan
Second Street Bridge
Allegan
Marshall Street Historic District
Allegan
Stedman, Sarah Lowe, House
Allegan
Oakwood Cemetery Chapel
Allegan
Pritchard's Outlook Historic District
Allegan
Born, Edward D., House
Allegan
Saugatuck Pump House
Saugatuck
Griswold Civic Center Historic District
Allegan
HENNEPIN Self-unloading Steamship (Shipwreck)
South Haven
Born, Engelbert B., House
Allegan
Fifty-Seventh Street Bridge
Manlius Township
Sutton, Warner P., House
Saugatuck
Felt, Dorr E., Mansion
Saugatuck
Navigation Structures at Saugatuck Harbor
Saugatuck
Leiendecker's Inn-Coral Gables
Saugatuck
West Bridge Street Historic District
Plainwell
Eesley, J. F., Milling Co. Flour Mill-Elevator
Plainwell
Franks, Henry, House
Allegan
Browse all Michiganhistoric sites ›

Other counties in Michigan

Explore census history and historic records for more Michigan counties.

IoniaIoscoIronIsabellaIsle RoyalJacksonKalamazooKalkaskaKentKeweenawLakeLapeerLeelanauLenaweeLivingstonLuceMackinacMacombManisteeManitou
Unlimited access

Everything a full report reveals about Allegan County, Michigan

This page charts the census history of Allegan County, Michigan. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
First month just $5.99, then $11.99 a month. Unlimited locations, cancel anytime.

Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.

Start your Allegan County, Michigan report
Or see a real report first

Explore Michigan records

Michiganhistory ›NRHP historic sites ›Notable people from Michigan›

Frequently asked about Allegan

When does Allegan first appear in the US census?
Allegan, Michigan first appears in the federal census in 1840, with a recorded population of 1,783.
What is the population of Allegan?
At the most recent federal census (2020), Allegan had a recorded population of 120,502.
How many historic places are in Allegan?
35 sites are listed on the National Register of Historic Places in Allegan, Michigan.
Aubrey Research

Research the history of any US location

Aubrey searches federal archives, archaeological records, historic registers, and primary sources to build a full historical report for any address or place in the United States.

Research your locationView a free sample report