| City: | Cynthiana, Ohio |
| County: | Pike County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:54:38 PM |
| Population: | 22 [See All] |
| Area Codes: | 220 / 326 / 740 / 937 |
| Classification: | PO Box |
| Coordinates: | 39.1661, -83.3534 |
| Land Area: | 0.021 sq mi |
| Quick Link: |
Cynthiana is a tiny hamlet in Pike County, Ohio, with just 22 residents living across 13 households. The post office maintains 24 PO Boxes for this small community and surrounding rural areas, serving nearly twice as many boxes as local households. This 1.85x adoption rate means the Cynthiana post office functions as a regional service point for scattered rural residents beyond the hamlet's immediate boundaries.
The community occupies just 0.002 square miles, making it one of the smallest geographic areas for a PO Box classified ZIP. Despite its PO Box classification, rural carrier delivery exists along State Route 41, the single street within the ZIP boundary. General Delivery is also available at the post office.
With a median age of 60.1 years and all 13 housing units owner-occupied, Cynthiana has the character of an older, settled community. There are no rental units and no children under 18 in the population. The 19 white residents, 2 American Indian residents, and 1 person of two or more races make up this small population. Pike County's rural character extends to Cynthiana, where agricultural and woodland areas dominate the landscape.
Mail to Cynthiana should be addressed to:
PO Box [Number]
Cynthiana, OH 45624
Rural delivery is available along State Route 41 for residents with established carrier service.
Single street: State Route 41, a state highway corridor through rural Pike County.
ZIP Code 45624 has 22 residents and 13 households (average 1.69 persons per household). The median age is 60.1 years, significantly older than the state (39.8) and significantly older than the nation (38.8). The gender split is 68.2% male and 31.8% female, which is much higher than the state male share (49.0%), making this a male-majority area. Largest groups are White (86.4%, much higher than the state average of 77.0% and well above the national average of 61.6%) and American Indian & Alaska Native (9.1%, much higher than the state average of 0.3% and well above the national average of 1.1%); Hispanic or Latino residents make up 4.5%, which is much lower than the national average (18.7%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 22Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 1,047.6 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 13Source: Census DHC |
| Average House Value: | $666,666,666Source: Census ACS |
| Persons Per Household: | 1.69Source: Census DHC |
| Average Family Size: | 1.82Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 29 | 26 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 29 | 0 | 0 | 0 | 0 |
| Decennial Census | 31 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 22 | -- | -- | -- | -- |
Median Age: 60.1
Male Median Age: 60.6
Female Median Age: 6.6
| 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 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 12 | 0 | 0 | 0 | 0 | 0 |
| Female | 1 | 4 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 1 | 4 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 12 | 0 | 0 | 0 | 0 | 0 |
| White: | 19 | 86.36% |
| Black: | 0 | 0% |
| Hispanic:* | 1 | 4.55% |
| Asian: | 0 | 0% |
| American Indian: | 2 | 9.09% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 22 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 15 | 68.18% | 60.6 years |
| Females: | 7 | 31.82% | 6.6 years |
| Total: | 22 | 100% | 60.1 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% |
In 2024, the median home value is $0, which is much lower than the national median ($303,400), and above its 2019 pre-pandemic level by $0. The median gross rent is $0, which is well under the national median ($1,348), and above its 2019 pre-pandemic level by $0. Insufficient data for owner/renter mix. Insufficient data for vacancy rate.
Explore More:Compare Home ValueHome Value Over TimeRent & Over TimeHousing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Less than $500: | 0 | 0% |
| $500 to $999: | 0 | 0% |
| $1,000 to $1,499: | 0 | 0% |
| $1,500 to $1,999: | 0 | 0% |
| $2,000 to $2,499: | 0 | 0% |
| $2,500 to $2,999: | 0 | 0% |
| $3,000 or more: | 0 | 0% |
| No Rent: | 0 | 0% |
| Total: | 0 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Owner Occupied (with mortgage): | 0 | 0% |
| Owner Occupied (free and clear, no mortgage): | 0 | 0% |
| Renter Occupied: | 0 | 0% |
| Total Occupied Housing Units: | 0 | 100% |
| Occupied Housing Units: | 0 | 0.00% |
| Vacant Housing Units (not graphed): | 24 | 100.00% |
| Total Housing Units: | 24 | 100% |
| Single-Family Units: | 24 | 100.00% |
| Multi-Family Units: | 0 | 0.00% |
| Other Units: | 0 | 0% |
| Total Housing Units: | 24 | 100% |
ZIP Code 45624 is designated for PO Box delivery only; business establishment and employment data are not available.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 24Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 45624 is located in Pike County, Ohio, within the Metropolitan Statistical Area (CBSA ) and Ohio's 2nd Congressional District. This area has a population of 0 people, about 0.00% of whom live in ZIP Code 45624. It covers 0.021 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | --Source: Census |
| CBSA Number: | --Source: Census |
| CBSA Type: | --Source: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 0Source: Census |
| MSA: | Source: Census |
| Land Area: | 0.021 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 3221.62 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 3919848Source: Census |
| Place Name: | Cynthiana CDP; OhioSource: Census |
We could not locate which school district 45624 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.