Wisconsin

Rock

163,687

2020 population

1840

first census record

census records

About Rock

Rock, Wisconsin, first appears in the United States federal census in 1840, when it recorded a population of 1,701. At the most recent census, in 2020, its population stood at 163,687.

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

On the ground today, 144 places are listed on the National Register of Historic Places.

Population by decade

Census Year	Population	Chart
2020	163,687
2010	160,331
2000	152,307
1990	139,510
1980	139,420
1970	131,970
1960	113,913
1950	92,778
1940	80,173
1930	74,206
1920	66,150
1910	55,538
1900	51,203
1890	43,220
1880	38,823
1870	39,030
1860	36,690
1850	20,750
1840	1,701

Source

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

Historic places in Rock

National Register of Historic Places listings in Rock, Wisconsin.

City of Beloit Waterworks and Pump Station

Willard, Frances, Schoolhouse

Janesville

Old Fourth Ward Historic District

Janesville

Shopiere Congregational Church

Shopiere

Church of St. Thomas the Apostle

Beloit

Jones, John H., House

Fulton Congregational Church

Fulton

Cooksville Cheese Factory

Lathrop-Munn Cobblestone House

Beloit

Smith, John, House

Clinton

St. John's Lutheran Church

Evansville

Crosby, James B., House

Janesville

LaPrairie Grange Hall No. 79

Janesville

Beloit Water Tower

Beloit

Dean, Erastus, Farmstead

Janesville

Turtleville Iron Bridge

Beloit

St. Paul's Episcopal Church

Beloit

South Main Street Historic District

Janesville

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Other counties in Wisconsin

Explore census history and historic records for more Wisconsin counties.

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Everything a full report reveals about Rock County, Wisconsin

This page charts the census history of Rock County, Wisconsin. 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.

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Frequently asked about Rock

When does Rock first appear in the US census?

Rock, Wisconsin first appears in the federal census in 1840, with a recorded population of 1,701.

What is the population of Rock?

At the most recent federal census (2020), Rock had a recorded population of 163,687.

How many historic places are in Rock?

144 sites are listed on the National Register of Historic Places in Rock, Wisconsin.

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