New Jersey

Monmouth

643,615

2020 population

1790

first census record

census records

About Monmouth

Monmouth, New Jersey, first appears in the United States federal census in 1790, when it recorded a population of 16,918. At the most recent census, in 2020, its population stood at 643,615.

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

On the ground today, 6 documented military engagements have been recorded within the county, among them Battle of Freehold (Monmouth Second Phase), Battle of Monmouth (approach actions, 1778), Battle of Monmouth Courthouse, and 116 places are listed on the National Register of Historic Places.

Population by decade

Census Year	Population	Chart
2020	643,615
2010	630,380
2000	615,301
1990	553,124
1980	503,173
1970	459,379
1960	334,401
1950	225,327
1940	161,238
1930	147,209
1920	104,925
1910	94,734
1900	82,057
1890	69,128
1880	55,538
1870	46,195
1860	39,346
1850	30,313
1840	32,909
1830	29,233
1820	25,038
1810	22,150
1800	19,872
1790	16,918

Source

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

Battles & engagements in Monmouth

Military engagements that took place in Monmouth, New Jersey.

Battle of Freehold (Monmouth Second Phase)

1778

Battle of Monmouth (approach actions, 1778)

1778

Battle of Monmouth Courthouse

1778

Battle of Monmouth Jun 28 1778

1778

Battle of Monmouth Courthouse (approach actions)

1778

Battle of Monmouth

1778

Historic places in Monmouth

National Register of Historic Places listings in Monmouth, New Jersey.

Shadow Lawn

West Long Branch

St. Peter's Episcopal Church

Freehold Borough

Fortune, T. Thomas, House

Red Bank

Allgor-Barkalow Homestead

Church of the Presidents

Long Branch

CHAUNCY JEROME JR Shipwreck Site

Long Branch City

Court Street School

Freehold

Navesink Military Reservation

Middletown Township

Manasquan Friends Meetinghouse and Burying Ground

Taylor, George, House

Freehold Borough

Winsor Building

Asbury Park

Steinbach-Cookman Building

Asbury Park

Duggan, Frederic A, First Aid and Emergency Squad Building

Spring Lake

All Saints' Memorial Church Complex

Hankinson-Moreau-Covenhoven House

Browse all New Jerseyhistoric sites ›

Other counties in New Jersey

Explore census history and historic records for more New Jersey counties.

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Everything a full report reveals about Monmouth County, New Jersey

This page charts the census history of Monmouth County, New Jersey. 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 Monmouth

When does Monmouth first appear in the US census?

Monmouth, New Jersey first appears in the federal census in 1790, with a recorded population of 16,918.

What is the population of Monmouth?

At the most recent federal census (2020), Monmouth had a recorded population of 643,615.

Were any battles fought in Monmouth?

6 documented military engagements took place in Monmouth, including Battle of Freehold (Monmouth Second Phase), Battle of Monmouth (approach actions, 1778), Battle of Monmouth Courthouse.

How many historic places are in Monmouth?

116 sites are listed on the National Register of Historic Places in Monmouth, New Jersey.

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