Town guide

Ada, Ohio

Ada is a village in Hardin County, Ohio, home to about 4,797 people across 2.1 square miles. Its ZIP code is 45810.

Homes sold for a median of $138 per square foot in the three months ending August 2026, a seller’s market.

Population4,7972,252 per sq mi
Median home value$160,500Census, as estimated by owners
Price per sq ft$138Sold homes, 3 months to August 2026
Sold over asking15%Latest 3 months

ZIP codes in Ada

1 ZIP code

Each card is that ZIP code’s whole market, including any part outside Ada. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology

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We’re writing up Ada’s story and what everyday life there is like, for people thinking about moving in.

  • History
  • What it’s like to live there
  • Getting around
  • Things to do

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Around Ada

Distances

Nearest major airportJohn Glenn Columbus International Airport (CMH)72 miles away
Closer regional airportEugene F. Kranz Toledo Express Airport (TOL)56 miles away
Nearest city of 250,000+Toledo, OH63 miles away
Nearest city of 1 million+Chicago, IL214 miles away

Straight-line distances from the center of Ada; driving is longer.

Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.

Who represents Ada

Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.

Population over time

Ada had 5,334 residents in the 2020 census, down 4% since 2000.

It’s the 299th largest of 1,264 towns in Ohio by population.

Hardin County grew from 31,187 residents in 1900 to 30,696 in 2020.

Ada population by census2000: 5,582, 2010: 5,952, 2020: 5,3345,58220005,95220105,3342020

Hardin County, 1900–2020

Hardin County population, 1900 to 20201900: 31,187, 1910: 30,407, 1920: 29,167, 1930: 27,635, 1940: 27,061, 1950: 28,673, 1960: 29,633, 1970: 30,813, 1980: 32,719, 1990: 31,111, 2000: 31,945, 2010: 32,058, 2020: 30,69631K’00’1029K’20’3027K’40’5030K’60’7033K’80’9032K’00’1031K’20

Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).

Weather by month

Average highs peak around 84°F in summer, and winter lows average 20°F. About 36 inches of rain and melted snow fall in a typical year.

Average high and low temperature and precipitation by month near AdaJan: high 34°F, low 20°F, 2.2 in; Feb: high 38°F, low 22°F, 1.9 in; Mar: high 48°F, low 30°F, 2.6 in; Apr: high 61°F, low 40°F, 3.6 in; May: high 72°F, low 51°F, 3.8 in; Jun: high 81°F, low 61°F, 4 in; Jul: high 84°F, low 63°F, 3.7 in; Aug: high 82°F, low 61°F, 3.5 in; Sep: high 76°F, low 54°F, 2.9 in; Oct: high 64°F, low 44°F, 2.7 in; Nov: high 50°F, low 34°F, 2.8 in; Dec: high 39°F, low 26°F, 2.3 in34°20°Jan2.238°22°Feb1.948°30°Mar2.661°40°Apr3.672°51°May3.881°61°Jun4.084°63°Jul3.782°61°Aug3.576°54°Sep2.964°44°Oct2.750°34°Nov2.839°26°Dec2.3Rain and melted snow, inches

Source: NOAA 1991–2020 climate normals, Lima Allen Co Ap, OH weather station (12 miles away).

Jobs in Hardin County

6,502 jobs at 421 businesses in Hardin County. The biggest industries by employees:

Largest industries in Hardin CountyManufacturing: 1,517 jobs; Educational services: 1,201 jobs; Hotels and restaurants: 870 jobs; Retail trade: 742 jobs; Health care and social assistance: 682 jobs; Professional services: 306 jobs; Other services: 224 jobs; Administrative and support: 189 jobsManufacturing 23% Educational services 19% Hotels and restaurants 13% Retail trade 11% Health care and social assistance 11% Professional services 5% Other services 3% Administrative and support 3%

Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).

Health care

29 doctors and other health care providers list an office in Ada.

Nearest hospitals

  • Bluffton HospitalCritical access hospital · emergency room · Bluffton9.1 miles
  • Hardin Memorial HospitalCritical access hospital · emergency room · Kenton14.4 miles
  • Lima Memorial Health SystemGeneral hospital · emergency room · CMS rating 3 of 5 · Lima14.5 miles

Providers with an office here

Primary care doctors4
Dentists1
Nurse practitioners and physician assistants5
Mental health providers5
Physical and occupational therapists9
Optometrists2
Chiropractors3
Pharmacies2

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.

Places in and around Ada

Grocery stores (1 nearby)

  • Community Markets0.8 mi

Pharmacies (1 nearby)

  • Rite Aid0.6 mi

Libraries (2 nearby)

  • Ada Public Library0.4 mi
  • Heterick Memorial Library0.7 mi

Theaters and performance venues (1 nearby)

  • Freed Center for the Performing Arts0.8 mi

Counts are within about 1 mile 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.

Colleges, teams and notable people

Established in 1853.

Colleges and universities

  • Ohio Northern University

Notable people born here

  • Rollo May (1909) · American psychologist (1909–1994)

Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.

Schools in Ada

Public schools here are run by Ada Exempted Village. Check each district’s attendance zones for a specific address.

Public schools (2)
SchoolGradesStudentsTypeDistance
Ada Elementary SchoolAdaK–6461Public0.8 mi
Ada High SchoolAda7–12404Public1.0 mi

Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.

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Towns near Ada

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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.