This is less than a one percent rise in Monmouth County’s population, from 643,163 in 2020 to 645,354 in 2021.
Monmouth County had the sixth largest population in New Jersey in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
New Jersey Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| Ocean County | 638,824 | 648,998 | 1.6% |
| Warren County | 109,595 | 110,731 | 1% |
| Sussex County | 144,082 | 145,543 | 1% |
| Hunterdon County | 128,839 | 129,924 | 0.8% |
| Gloucester County | 302,607 | 304,477 | 0.6% |
| Cape May County | 95,077 | 95,661 | 0.6% |
| Burlington County | 461,862 | 464,269 | 0.5% |
| Morris County | 509,001 | 510,981 | 0.4% |
| Monmouth County | 643,163 | 645,354 | 0.3% |
| Salem County | 64,859 | 65,046 | 0.3% |
| Atlantic County | 274,191 | 274,966 | 0.3% |
| Somerset County | 345,014 | 345,647 | 0.2% |
| Camden County | 523,204 | 523,771 | 0.1% |
| Bergen County | 954,774 | 953,819 | -0.1% |
| Middlesex County | 861,908 | 860,807 | -0.1% |
| Cumberland County | 153,848 | 153,627 | -0.1% |
| Mercer County | 386,759 | 385,898 | -0.2% |
| Union County | 574,349 | 572,114 | -0.4% |
| Essex County | 862,032 | 854,917 | -0.8% |
| Passaic County | 523,100 | 518,117 | -1% |
| Hudson County | 722,655 | 702,463 | -2.8% |
ORGANIZATIONS IN THIS STORY
Borough of Rumson• Borough of Spring Lake Heights• West Freehold• Borough of Sea Bright• Borough of Deal• Shark River Hills• Leonardo• Borough of Highlands• Borough of Oceanport• Borough of Manasquan• Colts Neck• Shrewsbury Borough• Allenwood• Borough of Sea Girt• Borough of West Long Branch• Borough of Allenhurst• East Freehold• Port Monmouth• Ocean Township• Shrewsbury Township• Borough of Monmouth Beach• Lincroft• Borough of Interlaken• Borough of Matawan• Manalapan• City of Long Branch• Belford• Borough of Red Bank• West Belmar• Borough of Belmar• Borough of Union Beach• Borough of Brielle• Avon-By-The-Sea• Aberdeen• Oakhurst• Neptune City• Cliffwood Beach• Navesink• Morganville• Borough of Tinton Falls• Wanamassa• Borough of Eatontown• Borough of Keyport• Borough Of Freehold• Borough Of Roosevelt• City Of Asbury Park• Borough Of Lake Como• Borough Of Spring Lake• Borough Of Englishtown• Borough Of Bradley Beach• Robertsville• Borough Of Allentown• Ocean Grove• Ramtown• North Middletown• Village Of Loch Arbour• Strathmore• Borough Of Fair Haven• Borough Of Farmingdale• Borough Of Keansburg• Yorketown• Borough Of Little Silver• Borough Of Atlantic Highlands
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