Blue Ash is a city in Hamilton County, Ohio, home to about 13,455 people across 7.6 square miles. Its ZIP code is 45242, and parts of 45236 and 45241 are in Blue Ash too.
Homes sold for a median of $249 per square foot in the three months ending August 2026, a seller’s market.
Mostly Blue Ash; also Montgomery and Kenwood
Mostly Kenwood; part is in Blue Ash
Mostly Sharonville; part is in Blue Ash
Each card is that ZIP code’s whole market, including any part outside Blue Ash. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Blue Ash’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Cincinnati Northern Kentucky International Airport (CVG)21 miles away |
|---|---|
| Closer regional airport | Cincinnati Municipal Airport Lunken Field (LUK)10 miles away |
| Nearest city of 250,000+ | Cincinnati, OH10 miles away |
| Nearest city of 1 million+ | Chicago, IL250 miles away |
Straight-line distances from the center of Blue Ash; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Blue Ash had 13,394 residents in the 2020 census, up 7% since 2000.
It’s the 137th largest of 1,264 towns in Ohio by population.
Hamilton County grew from 409,479 residents in 1900 to 830,639 in 2020.
Hamilton County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 24°F. About 43.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Cincinnati Lunken Ap, OH weather station (10 miles away).
529,211 jobs at 21,087 businesses in Hamilton County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1,532 doctors and other health care providers list an office in Blue Ash.
Nearest hospitals
Providers with an office here
| Primary care doctors | 64 |
|---|---|
| Specialist doctors | 440 |
| Dentists | 60 |
| Nurse practitioners and physician assistants | 264 |
| Mental health providers | 486 |
| Physical and occupational therapists | 160 |
| Optometrists | 40 |
| Chiropractors | 18 |
| Pharmacies | 15 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (12 nearby)
Grocery stores (1 nearby)
Pharmacies (3 nearby)
Libraries (1 nearby)
Museums
Theaters and performance venues (2 nearby)
Counts are within about 2 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Sycamore Community City. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Maple Dale Elementary SchoolCincinnati | K–4 | 584 | Public | 0.4 mi |
| Montgomery Elementary SchoolCincinnati | K–4 | 566 | Public | 1.2 mi |
| Edwin H Greene Intermediate Middle SchoolCincinnati | 5–7 | 996 | Public | 0.7 mi |
| Sycamore Junior High SchoolCincinnati | 7–8 | 921 | Public | 1.2 mi |
| Sycamore High SchoolCincinnati | 9–12 | 1,678 | Public | 1.6 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Springs East Montessori SchoolCincinnati | Pre-K–2 | 6 | Nonsectarian | 2.5 mi |
| Skyward AcademyCincinnati | 4–12 | 61 | Jewish | 0.3 mi |
| Arch Bishop Moeller High SchoolCincinnati | 9–12 | 899 | Roman Catholic | 1.8 mi |
| Ursuline Academy of CincinnatiCincinnati | 9–12 | 483 | Roman Catholic | 0.4 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Sharonville, Montgomery, Kenwood, Deer Park, Dillonvale, Silverton, Evendale, Amberley, Rossmoyne, The Village of Indian Hill, Reading, Remington and Concorde Hills.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.