John Cook Farm · National Register of Historic Places
Harlem Township’s story
196 years in pictures
The archive holds 4 maps from 1902 on.
1 place on the National Register of Historic Places.
- 1830Harlem Township is settled
Harlem TownshipOH
5 bordering townsMap →
John Cook Farm · Photo: Wdzinc · CC BY-SA 3.0
Population
5,113
2025 Census estimate · +12.2% since 2020
Median home value
$419K
Census ACS
Household income
$122K
median
Median age
43.1
years
Jobs based here
479
A commuter town
TownGrade
B+
#347 of 987 in OH
Is Harlem Township a good place to live?
For most people who can afford it, yes. Harlem Township grades B+ overall, 347th among Ohio's 987 graded towns. The median household earns $122K and it is healthier than 89% of U.S. towns. What holds it back is price: homes are expensive, about $419K for a typical one and 5.1 times the Columbus metro’s $82K median household income. Most errands need a car: it is less walkable than 93% of U.S. towns. Harlem Township’s median household income is $122,000, where Ohio’s towns sit at $75,000 and U.S. towns at $80,000. John Cook Farm is on the National Register of Historic Places.
What makes Harlem Township stand out
Where Harlem Township beats most towns.
A growing town
Harlem Township has grown 29% since 2010
3,953 counted in 2010 and 4,554 in 2020; an estimated 5,113 in 2025.
Growth hasn’t slowed: 12.2% since 2020, after 15.2% in the decade before.
U.S. Census 2010 & 2020 counts · Census Bureau estimate, July 1, 2025
How Harlem Township grades
Each subject compared with towns across the country (schools within Ohio), ordered by how far Harlem Township is from typical.
WalkabilityEPA walkability 5 of 20; 3.4% of households have no car; 0% of workers walk, bike or ride transitDOpen →Jobs & incomeAOpen →HealthMount Carmel St. Ann's 8.2 miles awayAOpen →SchoolsA−Open →Cost of livingC−Open →Hazard riskinland flooding tops the listC+Open →
Character Graded, but not part of the overall grade.
Outdoors2 miles of trails; 0% conserved landDOpen →History1 place on the National RegisterA−Open →Civic life3.5 community nonprofits per 1,000 residentsB+Open →
Described, not graded Taste, not quality: snow or an older crowd is neither good nor bad.
How TownRatings grades towns →
Nearby attractions
All 48 attractions →Ohio Stadium and 32 more within 40 miles
Museums, parks, gardens and other places to visit around Harlem Township. Close and well known come first.
Big draw16 mi Stadium & arenaOhio Stadium
15 mi Stadium & arenaHistoric Crew Stadium
18 mi Stadium & arenaScottsMiracle-Gro Field
17 mi Zoo & aquariumColumbus Zoo and Aquarium
16 mi Stadium & arenaValue City Arena
33 mi LandmarkHarding TombSources: National Park Service · ski areas © OpenSkiMap / OpenStreetMap contributors · Wikidata · Wikipedia readership · photos via Wikimedia Commons
Photo credits
Ohio Stadium: Lectrician2, CC BY-SA 4.0 · Historic Crew Stadium: Rick Dikeman, CC BY-SA 3.0 · ScottsMiracle-Gro Field: Nova Crystallis, CC BY-SA 4.0 · Columbus Zoo and Aquarium: Adolphus79 at English Wikipedia, Public domain · Value City Arena: Nick81aku at English Wikipedia, Public domain · Harding Tomb: User:Postdlf, CC BY-SA 3.0
Getting set up
The full setup list →Moving to Harlem Township: who provides what
Who provides power, water and the rest in Harlem Township, and how to reach them.
PowerAEP Ohio19.0¢/kWh · EIA 2025HIFLD · EIA
WaterDel-Co WaterNo health-based violations in 5 years · EPAEPA
Internet6 providers98% of addresses get 100/20 MbpsFCC
Trash & dumpNot on file yetWe don’t have Harlem Township’s trash rules yet
Register to voteOnlineIn Ohio you can register online until 30 days before Election Day, in person until 30 days before Election Day, or by mail (postmarked 30 days before).vote.govWho runs elections hereDirector, Delaware County Board of ElectionsDelaware County; contacts on the Handbook page.FVAP, Jun 2022
ZIP codes43021, 43082, 43031, 4307443021 42% · 43082 37% · 43031 10% · 43074 7%Census 2020
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Aug 3, 2026.
The data
Ordered by what stands out in Harlem Township.
Harlem Township has less tooth loss than most of Ohio and sends most of its workers to Columbus and beyond, but it carries more natural-hazard risk than most of Ohio (mostly inland flooding).
HealthA
Harlem Township stands out in Ohio and nationally: a smaller share of its adults sleep under 7 hours
Its widest gap with Ohio is tooth loss: 7.8% of those 65+ have lost all their teeth, against 15.3% statewide. Against the 5,407 U.S. towns with household incomes like Harlem Township’s, it is healthier than 74%, a smaller edge than it has nationally: part of it comes with its incomes.
32% of adults sleep under 7 hours in Harlem Township. Harlem Township beats the Ohio average on 22 of 32 CDC measures and trails it on 0. 18% of adults get no exercise outside work in Harlem Township.
89%healthier than U.S. townsAHealth Grade
| Harlem Township | Ohio towns | U.S. towns | |
|---|---|---|---|
| Frequent physical distress (CDC PLACES) | 11% | 15% | 14% |
| Frequent mental distress (CDC PLACES) | 14% | 18% | 17% |
| Get no exercise (CDC PLACES) | 18% | 28% | 25% |
| Sleep under 7 hours (CDC PLACES) | 32% | 38% | 36% |
32 measures vs. Ohio
22 better10 too close to call0 worse
| What stands out | Harlem Township | OH |
|---|---|---|
| Fewer older adults who have lost all their teeth | 7.8% | 15.3% |
| Fewer adults facing food insecurity | 7.3% | 14.1% |
Mount Carmel St. Ann's
8.2 mi away · emergency room
1 of 3
care shortages: mental health
93rd
percentile among OH towns
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
SchoolsA−
Harlem Township’s schools rank ahead of 82% of Ohio districts
Its public schools are run by the Big Walnut Local school district. Its one school is below.
82%of OH districts it outscoresA−School Grade
| School | Level | Students | Letter |
|---|---|---|---|
| Hylen Souders Elementary SchoolLargest public elementary schoolGrades K–3 | Grades K–3 | 289 | B+ |
NCES · EDFacts · graded within OH on state tests and graduation
Work & commuteJobs & income grade A
About two in five of Harlem Township’s working residents commute to Columbus
Harlem Township has 479 jobs for its 2,156 working residents: even if every job went to a resident, most would still commute out.
Most working residents leave Harlem Township for work: only 4% work in town. 19% of Harlem Township workers work from home. Jobs based in Harlem Township grew to 479 in 2023, 229 more than in 2013.
4%work in town
| Harlem Township | Ohio towns | U.S. towns | |
|---|---|---|---|
| Work from home | 19% | 9.7% | 11% |
| Working residents who work in town | 3.6% | 6.9% | 8% |
| Below the poverty line | 7.4% | 9.1% | 9.6% |
| Average trip to work | 23 minutes | 24 minutes | 25 minutes |
Where working residents work
In Harlem Township4%
Columbus39%
Westerville9%
New Albany4%
Gahanna3%
14 mi
median commute distance
479
jobs based in Harlem Township
A commuter town
jobs vs. working residents
D
Walkability grade: more walkable than 7% of U.S. towns
Census LEHD 2023 · ACS
Climate
Harlem Township has four seasons and pleasant summers
Harlem Township has chilly winters and warm summers. July afternoons reach 84°, January nights drop to 20° and about 19 inches of snow falls in a winter.
19″snow a winter
Typical low → high °F
Winter23–38°
Spring40–62°
Summer61–83°
Fall43–64°
Oct 24
typical first frost
Apr 22
typical last frost
+1.1°
vs. the 20th-century average
NOAA U.S. Climate Normals, 1991–2020
Who lives here
More middle-aged adults than Ohio overall
The median household earns $122,311, against $71,389 across Ohio, one input to its A for jobs and income.
Adults 35 to 64 are 45% of residents (38% statewide). Harlem Township has grown 12% since 2020, to 5,113 residents in the Census Bureau’s 2025 estimate. 41% of adults 25 and older have a bachelor’s degree or more, vs 32% across Ohio.
43.1median age · OH 39.7
| Harlem Township | Ohio towns | U.S. towns | |
|---|---|---|---|
| Bachelor’s degree or more, 25+ | 41% | 24% | 29% |
| Under 18 | 20% | 22% | 22% |
| Aged 65 or older | 17% | 20% | 18% |
| Median age | 43.1 years | 41.7 years | 40.5 years |
Harlem TownshipOhioUnited States
Ages · share of residents
17%
Education · adults 25 and older
No diploma5%
High school28%
Some college15%
Associate’s12%
Bachelor’s25%
Graduate16%
Women and men · all residents
50% women, 50% men
That’s an even split within the survey’s margin of ±5.2 points. Across Ohio, 50.7% of residents are women.
| Harlem Township | OH | U.S. | |
|---|---|---|---|
| Under 10 | 7.8% | 11.7% | 11.6% |
| 10 to 17 | 12.4% | 10.3% | 10.3% |
| 18 to 24 | 8.6% | 8.9% | 9.1% |
| 25 to 34 | 10.1% | 13.2% | 13.7% |
| 35 to 44 | 17% | 12.5% | 13.2% |
| 45 to 54 | 13.5% | 12% | 12.2% |
| 55 to 64 | 14% | 13.2% | 12.7% |
| 65 to 74 | 9.4% | 10.9% | 10.2% |
| 75 and older | 7.3% | 7.3% | 7% |
| No diploma | 5% | 8.2% | 10.4% |
| High school | 27.5% | 32.1% | 26% |
| Some college | 15% | 19.3% | 19.1% |
| Associate’s | 11.9% | 9% | 8.8% |
| Bachelor’s | 24.8% | 19.3% | 21.6% |
| Graduate | 15.8% | 12.2% | 14.1% |
Census population estimates, 2025 · U.S. Census Bureau · ACS 2020-2024 5-year estimates
#585for trails in OH
0.1%
conserved · 16 of 16,906 acres
2.0 mi
of trails · 0.1 per sq mi
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Natural hazardsHazard risk grade C+
Moderate risk in Harlem Township, with inland flooding at the top
FEMA rates its natural-hazard risk higher than 86% of Ohio towns, with expected losses of about $308 per resident a year; that rating is what its C+ for hazard risk is built on.
Harlem Township’s FEMA risk score is 54 of 100. Since 1978, 4 flood insurance claims have been paid out in Harlem Township.
54risk score of 100
FEMA risk score
Inland floodingTornadoes
4
paid flood claims since 1978
1
federal disasters paid out here
FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
Keep exploring
Everything we know about Harlem Township
18pages on Harlem Township
The big questions
Out and about
The story
Day to day
After high school
Colleges nearby
8 within 15 miles of the center of Harlem Township
Otterbein UniversityUniversity or college · Private nonprofit · Westerville7.5 mi$35,548 tuitionFelbry CollegeUniversity or college · Private for-profit · Columbus9 mi$29,731 tuitionChamberlain University-OhioUniversity or college · Private for-profit · Columbus9.4 mi$19,975 tuition
About 6 of every 100 Harlem Township residents are enrolled in college, about the same as Ohio.
A commuter town
96% of working residents leave Harlem Township for work
Where Harlem Township’s working residents go each day. Line width shows the share.
479jobs based in Harlem Township
4%of working residents work in town
14 mimedian commute distance
Census LEHD 2023
About Harlem Township
Unincorporated community in Ohio, US
Harlem is an unincorporated community in Harlem Township, Delaware County, in the U.S. state of Ohio.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
Harlem Township’s neighbors
5 towns share a border with Harlem Township.
All 4 graded towns on its borders grade higher than its B+; Trenton Township (A−) is closest.
Plain TownshipGenoa TownshipTrenton TownshipMonroe TownshipHartford TownshipHarlem Township
How the neighbors grade
| Town | OH rank | Overall | Cost | Safety | Schools | Health |
|---|---|---|---|---|---|---|
| Harlem Township | #347 | B+ | C− | — | A− | A |
| Plain Township | #55 | A+ | C− | — | A | A+ |
| Genoa Township | #142 | A | D | A+ | B+ | A |
| Trenton Township | #269 | A− | C | — | A− | A |
| Monroe Township | #134 | A | C+ | — | A | B+ |
| Hartford Township | — | — | C+ | — | B− | B+ |
Hartford Township has fewer than 2,500 residents, so it gets subject grades but no overall grade. Harlem Township, Plain Township, Trenton Township, Monroe Township and Hartford Township report no FBI crime data of their own. Compare Harlem Township with a neighbor →
Questions about Harlem Township
Short answers, built from the data on this page.
Is Harlem Township, OH a good place to live?
For most people who can afford it, yes. Harlem Township grades B+ overall, better than 70% of U.S. towns and #347 of 987 in Ohio. It grades A for health and A− for schools. Walkability is its weak spot, with a D.
Is Harlem Township, OH expensive?
Yes. Cost of living, which also weighs rents, property taxes and how many households pay 30% or more of their income for housing, grades C−.