Demographics of Monmouth County, New Jersey

Monmouth County, New Jersey had 651,035 people on July 1, 2025, by the Census Bureau’s estimate: +8,650 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Monmouth County, in four figures

651,035
Population: July 1, 2025, Vintage 2025 estimate.; +1.3%
Change since July 2020: +8,650 people.; 43.2 ±0.2
Median age: ACS 2020–⁠2024.; $124,845 ±$2,115
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Monmouth County, New Jersey's population grew 1.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Monmouth County, New Jersey's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Monmouth County, New Jersey's population grew 1.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Monmouth County, New Jersey's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	642,385	100.0	100.0
2021	645,873	100.5	100.2
2022	645,026	100.4	100.7
2023	645,796	100.5	101.6
2024	648,673	101.0	102.5
2025	651,035	101.3	103.1

3 more columns on a wider screen

Population of Monmouth County, New Jersey on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	642,385	−1,103	−759	+5	−426
2021	645,873	+3,488	−414	+309	+3,208
2022	645,026	−847	−5	+2,097	−2,802
2023	645,796	+770	+627	+3,043	−2,862
2024	648,673	+2,877	+623	+3,478	−1,156
2025	651,035	+2,362	+715	+1,196	+447

Age, 2020–2024

The median age is 43.2 ±0.2: for men 41.9 ±0.2 and for women 44.6 ±0.1. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

2 more columns on a wider screen

People in Monmouth County by age, ACS 2020–2024
Age	People	Share	New Jersey	United States
Under 5	32,326 ±33	5.0% ±<0.1	5.6% ±<0.1	5.6% ±<0.1
5 to 17	102,420 ±1,735	15.9% ±0.3	16.2% ±0.1	16.3% ±<0.1
18 to 24	52,563 ±1,372	8.1% ±0.2	8.4% ±0.1	9.1% ±<0.1
25 to 44	148,056 ±1,627	22.9% ±0.3	26.2% ±0.1	26.9% ±<0.1
45 to 64	186,618 ±2,000	28.9% ±0.3	26.5% ±0.1	24.8% ±<0.1
65 and over	123,370 ±2,204	19.1% ±0.3	17.2% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $124,845 ±$2,115, and income per person $66,696 ±$972, in 2024 dollars. The median is $103,556 ±$513 in New Jersey and $80,734 ±$166 in the United States.

Households by income

2 more columns on a wider screen

Households in Monmouth County by income, ACS 2020–2024
Household income	Households	Share	New Jersey	United States
Under $25,000	23,699 ±1,424	9.4% ±0.6	11.6% ±0.2	14.6% ±<0.1
$25,000 to $49,999	27,101 ±1,379	10.8% ±0.5	12.8% ±0.2	16.7% ±<0.1
$50,000 to $74,999	25,573 ±1,300	10.2% ±0.5	12.8% ±0.2	15.5% ±<0.1
$75,000 to $99,999	25,836 ±1,275	10.3% ±0.5	11.3% ±0.2	12.6% ±<0.1
$100,000 to $149,999	44,247 ±1,851	17.6% ±0.7	18.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	32,579 ±1,325	12.9% ±0.5	11.8% ±0.2	9.6% ±<0.1
$200,000 or more	72,677 ±1,517	28.9% ±0.6	21.6% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

2 more columns on a wider screen

Poverty rate in Monmouth County by age, ACS 2020–2024
Age	Below poverty	Rate	New Jersey	United States
All ages	41,441 ±2,364	6.5% ±0.4	9.7% ±0.2	12.5% ±0.1
Under 18	9,644 ±1,065	7.2% ±0.8	13.0% ±0.3	16.1% ±0.1
18 to 59	20,194 ±1,475	6.1% ±0.4	8.6% ±0.2	11.6% ±0.1
60 and over	11,603 ±941	6.7% ±0.5	9.3% ±0.2	11.0% ±<0.1

Housing, 2020–2024

1 more column on a wider screen

Housing in Monmouth County, ACS 2020–2024
Measure	Monmouth County	New Jersey	United States
Housing units	270,415 ±215	3,791,354 ±469	143,775,355 ±10,234
Occupied	93.1% ±0.4	92.5% ±0.1	89.9% ±0.1
Vacant	6.9% ±0.4	7.5% ±0.1	10.1% ±0.1
Owner occupied	75.6% ±0.5	63.8% ±0.3	65.2% ±0.3
Renter occupied	24.4% ±0.7	36.2% ±0.2	34.8% ±0.1
Median home value	$606,100 ±$5,540	$454,400 ±$1,150	$332,700 ±$236
Median gross rent	$1,827 ±$30	$1,720 ±$7	$1,413 ±$2
Median year built	1975 ±2	1970 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

2 more columns on a wider screen

People in Monmouth County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	New Jersey	United States
Hispanic or Latino	83,325 ±0	12.9% ±<0.1	22.5% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	461,195 ±1,602	71.5% ±0.2	50.9% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	37,374 ±951	5.8% ±0.1	12.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	34,646 ±756	5.4% ±0.1	10.0% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	45 to 153	< 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	235 ±55	< 0.1% ±<0.1	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	5,244 ±1,195	0.8% ±0.2	0.8% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	23,235 ±1,763	3.6% ±0.3	3.5% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

2 more columns on a wider screen

People in Monmouth County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	New Jersey	United States
Born in the state	372,336 ±3,719	57.7% ±0.6	50.8% ±0.2	57.3% ±<0.1
Born in another state	176,414 ±3,617	27.3% ±0.6	22.7% ±0.1	26.9% ±<0.1
Born a citizen outside the states	8,760 ±877	1.4% ±0.1	2.6% ±<0.1	1.7% ±<0.1
Born abroad	87,843 ±2,601	13.6% ±0.4	23.9% ±0.2	14.1% ±<0.1
Naturalized citizens	56,254 ±1,990	8.7% ±0.3	13.5% ±0.1	7.4% ±<0.1
Not citizens	31,589 ±1,918	4.9% ±0.3	10.5% ±0.1	6.8% ±<0.1

Monmouth County among the counties of New Jersey

6th of 21 by population, July 2025. Every one is listed on the New Jersey page.

Counties of New Jersey near Monmouth County in population, July 2025
County	July 2025	Change since 2020
Bergen County	977,026	+2.4%
Essex County	896,379	+4.2%
Middlesex County	883,335	+2.6%
Hudson County	735,033	+1.8%
Ocean County	673,746	+5.6%
Monmouth County	651,035	+1.3%
Union County	601,863	+4.9%
Camden County	535,799	+2.4%
Passaic County	531,624	+1.6%
Morris County	524,251	+3.2%
Burlington County	481,439	+4.3%

Elsewhere on the site

Rankings this appears in

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026