Interlaken, New Jersey Demographics & Population 2026
During the 2020–2024 ACS period, Interlaken, New Jersey had a total population of 939, the 558th largest borough in New Jersey, with a median household income of $199,167, which is 92% higher than the state average. The poverty rate is 1.4%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 92% above the state average — one of the wealthiest communities in New Jersey.
- An exceptionally low poverty rate of 1.4% — among the lowest in New Jersey.
Interlaken Quick Facts
How Interlaken Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 821 | 939 | +14.4% |
| Median household income | $180,972 | $199,167 | +10.1% |
| Median home value | $935,600 | $1,058,200 | +13.1% |
How Interlaken Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 66 | National average: 61
Education
Educational Attainment (Adults 25+)
Interlaken Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Monmouth County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Long Branch | 32,530 | $79,653 | 15.5% | $574,000 |
| Tinton Falls | 19,361 | $117,308 | 6.8% | $478,000 |
| Asbury Park | 15,295 | $75,544 | 21.9% | $581,100 |
| West Freehold | 14,883 | $130,800 | 4.0% | $529,000 |
| Eatontown | 13,575 | $90,463 | 4.4% | $492,400 |
| Red Bank | 12,862 | $97,477 | 8.7% | $504,900 |
| Freehold | 12,507 | $85,707 | 14.3% | $416,800 |
| Robertsville | 12,035 | $210,661 | 2.6% | $685,100 |
| Keansburg | 9,719 | $81,428 | 10.7% | $311,800 |
| Matawan | 9,710 | $123,354 | 10.5% | $467,800 |
Cities Similar to Interlaken
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Flagtown | 930 | $229,612 | $689,000 | 57.3% | 6.5% |
| Stone Harbor | 893 | $169,167 | $2,000,000+ | 70.3% | 6.0% |
| Vienna | 999 | $170,913 | $482,600 | 50.7% | 2.3% |
| Crosswicks | 900 | $161,012 | $688,000 | 52.8% | 8.8% |
| Far Hills | 948 | $143,250 | $792,100 | 61.7% | 5.4% |
A note before these figures: with a population of 939, Interlaken's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Interlaken is a small community located in New Jersey, within Monmouth County. The total population is 939. It ranks as the 558th most populous out of 700 Census-designated places in New Jersey.
Age Demographics
The median age in Interlaken is 50.7 years. This is 26% higher than the state median of 40.1 years.
Economy, Income & Housing
The median household income in Interlaken is $199,167. This is 92% higher than the state median of $103,556. It is also 147% higher than the national median of $80,734. The poverty rate stands at 1.4%. This is 86% lower than the state poverty rate of 9.7%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 3.7%. This is 42% lower than the state rate of 6.3%. The median home value is $1,058,200. Housing costs are 133% higher than the state median of $454,400. The home-value-to-income ratio is 5.3x. 93.7% of occupied housing units are owner-occupied. This homeownership rate is 47% higher than the state average of 63.8%.
Race & Ethnicity
Interlaken has a predominantly White (non-Hispanic) population, comprising 93.2% of all residents. Hispanic or Latino residents account for 3.5%. The White (non-Hispanic) population is significantly higher than the state average (93.2% vs 50.9%). The Hispanic or Latino population (3.5%) is well below the state average of 22.5%. The Asian population (0.6%) is well below the state average of 10.1%.
Education
67.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 54% higher than the state rate of 43.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 98.9%. Notably, 24.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Interlaken, New Jersey is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against New Jersey state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 700 Census-designated places in New Jersey. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Interlaken, New Jersey?
Interlaken, New Jersey has a population of 939 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Interlaken, NJ?
The median household income in Interlaken is $199,167, which is 147% higher than the national median of $80,734.
What is the poverty rate in Interlaken, NJ?
The poverty rate in Interlaken is 1.4%. This means approximately 13 residents live below the federal poverty line.
What is the racial makeup of Interlaken, New Jersey?
Interlaken's population is 93.2% White, 0.0% Black, 3.5% Hispanic/Latino, and 0.6% Asian.
What is the median home value in Interlaken, NJ?
The median home value in Interlaken is $1,058,200. The home-value-to-income ratio is 5.3x.
How educated is Interlaken, New Jersey?
67.2% of adults (25+) in Interlaken hold a bachelor's degree or higher, and 24.6% hold a graduate or professional degree.