| City: | Mahopac Falls, New York |
| County: | Putnam County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:34:41 PM |
| Population: | 85 [See All] |
| Area Codes: | 329 / 845 / 914 |
| Classification: | PO Box |
| Coordinates: | 41.3716, -73.7622 |
| Land Area: | 0.029 sq mi |
| Quick Link: |
Mahopac Falls isn't a sprawling town. It's a PO Box ZIP serving just 25 households but maintaining 171 PO Boxes. That's an adoption rate of 6.84, meaning the post office serves nearly seven times as many boxes as local housing units. This ZIP draws customers from well beyond its immediate area.
The discrepancy tells the real story. Mahopac Falls has a population of only 85 people living in those 25 households. But the post office serves customers who find this location more convenient than their home ZIP codes. Some may work nearby and prefer picking up mail here. Others might have businesses that operate from PO Box addresses. The facility becomes a regional service point rather than a purely local one.
The ZIP covers minimal physical space. There's just 0.029 square miles of land and no water area. One street handles mail delivery: Myrtle Avenue serves 83 records with unit numbers. The street presence is limited, but the PO Box infrastructure is substantial. This makes Mahopac Falls a service hub for people whose addresses say something else.
Putnam County communities often share postal services this way. The 2020 Census recorded a median age of 28.2 years here, suggesting younger households or families. The population includes 38 White residents, 7 Black residents, 9 Asian residents, and 13 multiracial residents. Seven residents identify as Hispanic. The demographic mix reflects the broader region's diversity, though the tiny population makes each person's identity more visible in the percentages.
With only Myrtle Avenue appearing in the street delivery records, this ZIP demonstrates extreme geographic concentration. The single-street pattern reflects a postal facility serving a very compact residential area while maintaining extensive PO Box infrastructure for regional customers.
ZIP Code 10542 has 85 residents and 25 households (average 3.40 persons per household). The median age is 28.2 years, significantly younger than the state (39.0) and significantly younger than the nation (38.8). The gender split is 47.1% male and 52.9% female, which is slightly lower than the national male share (49.1%), making this a female-majority area. Largest groups are White (44.7%, much lower than the state average of 55.2% and well below the national average of 61.6%) and Hispanic or Latino (34.1%); Hispanic or Latino residents make up 34.1%, which is much higher than the national average (18.7%).
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 85Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 2,931.0 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 25Source: Census DHC |
| Average House Value: | $666,666,666Source: Census ACS |
| Persons Per Household: | 3.40Source: Census DHC |
| Average Family Size: | 3.90Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 85 | -- | -- | -- | -- |
Median Age: 28.2
Male Median Age: 28.7
Female Median Age: 26.5
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 3 | 5 | 2 | 1 | 2 | 9 | 3 | 0 | 1 | 4 | 0 | 0 | 0 | 5 | 0 | 5 | 0 | 0 |
| Female | 5 | 2 | 9 | 3 | 1 | 7 | 0 | 0 | 0 | 2 | 4 | 4 | 2 | 1 | 4 | 0 | 0 | 1 |
| Total | 8 | 7 | 11 | 4 | 3 | 16 | 3 | 0 | 1 | 6 | 4 | 4 | 2 | 6 | 4 | 5 | 0 | 1 |
| White: | 38 | 39.58% |
| Black: | 7 | 7.29% |
| Hispanic:* | 29 | 30.21% |
| Asian: | 9 | 9.38% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 13 | 13.54% |
| Total: | 96 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 40 | 47.06% | 28.7 years |
| Females: | 45 | 52.94% | 26.5 years |
| Total: | 85 | 100% | 28.2 years |
| Native, born in the United States: | 0 | 0% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0% |
| Foreign born, naturalized U.S. citizen: | 0 | 0% |
| Foreign born, not a U.S. citizen: | 0 | 0% |
| Total Population: | 0 | 100% |
| Total Native Population: | 0 | 0% |
| Total Foreign-born Population: | 0 | 0% |
ZIP Code 10542 supports both business and residential activity. According to the Business Census (2024), there are 11 business establishments, employing about 81 people with an annual payroll of $3,549,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 634Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 11Source: CBP |
| 1st Quarter Payroll: | $875,000Source: CBP |
| Annual Payroll: | $3,549,000Source: CBP |
| # of Employees: | 81Source: CBP |
ZIP Code 10542 is located in Putnam County, New York, within the New York-Newark-Jersey City, NY-NJ Metropolitan Statistical Area (CBSA 35620) and New York's 17th Congressional District. This Metro area has a population of 18,897,109 people, about 0.00% of whom live in ZIP Code 10542, and is subdivided into the New York-Jersey City-White Plains, NY-NJ division. It covers 0.029 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | New York-Newark-Jersey City, NY-NJSource: Census |
| CBSA Number: | 35620Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | New York-Jersey City-White Plains, NY-NJ (CBSA Div 35614)Source: Census |
| CBSA Population: | 18,897,109Source: Census |
| MSA: | New York-Northern New Jersey-Long Island, NY-NJ-CT-PASource: Census |
| Land Area: | 0.029 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 17Source: USPS |
| Congressional Land Area: | 382.63 sq miSource: Census |
| PMSA: | New York, NY PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 10542 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.