Interlaken

County:: Monmouth County
County Seat:: No
Area (mi²):: 0.331
State:: New Jersey

Interlaken is a borough located in Monmouth County, New Jersey. Interlaken has a 2025 population of 813. Interlaken is currently declining at a rate of -0.25% annually and its population has decreased by -1.22% since the most recent census, which recorded a population of 823 in 2020.

The average household income in Interlaken is $217,896 with a poverty rate of 3.41%.The median age in Interlaken is 57 years: 57.1 years for males, and 55.3 years for females.

Demographics

The racial composition of Interlaken includes 95.49% White, and smaller percentages for Asian and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	784	95.49%
Two or more races	30	3.65%
Asian	7	0.85%

Interlaken Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Interlaken's average per capita income is $96,944. Household income levels show a median of $180,972. The poverty rate stands at 3.41%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$211,979	-
Families	$210,208	$250,384
Households	$180,972	$217,896
Non Families	$111,875	$138,672

$96,944

Average Income

$180,972

Median Household Income

3.41%

Poverty Rate