What city is 45231 in?

45231 is a Cincinnati, OH mailing address. By land area, 17% lies inside New Burlington, 13% lies inside Finneytown, 10% lies inside Mount Healthy and 5% lies inside Pleasant Run; the rest is outside any Census-defined city or community.

What is the population of 45231?

About 40,463 people (±2,569), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 41,934.

What is the median household income in 45231?

$71,353 (±$3,838), compared with $71,389 for Ohio as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 45231?

30 USPS carrier routes with 17,706 residential and 690 business mailboxes (18,396 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 45231?

The closest, measured center to center: 45218 (1.5 mi, Greenhills), 45240 (2.7 mi, Forest Park), 45224 (3.1 mi, Cincinnati), 45239 (3.9 mi, White Oak), 45251 (3.9 mi, Northgate) and 45215 (4 mi, Wyoming).

45231 ZIP Code, Cincinnati, OH

45231 is a ZIP code in Cincinnati, Ohio in Hamilton County. It covers 15 square miles of land. The closest ZIP codes are 45218, 45240 and 45224. 40,463 people live here in 16,911 households, more than in 9 of every 10 Ohio ZIP codes. At about 2,738 people per square mile it has suburban density, and most homes are owner-occupied (73%). Median household income is $71,353, close to the Ohio median of $71,389.

Quick facts

Mailing city: Cincinnati, OH
County: Hamilton County
Land area: 15 sq mi
Population: 40,463
Median household income: $71,353
Carrier routes: 30 (17,706 homes)

Key figures

Measure	Value
Residents	40,463
Households	16,911
Median household income	$71,353
Income per person	$36,975
Median age	41.1
Homeowners	72.6%
Median home value	$176,000
Median rent	$1,232
Bachelor's degree or higher	29.2%
Average commute (minutes)	24.6
Households with kids under 18	27.3%
Moved in the past year	11.7%
Below the poverty line	11.7%
Broadband internet	92.3%
Speak a non-English language at home	7.5%

Household income

% of households	Value
<$10K	6.5%
$10–15K	1.9%
$15–25K	6.0%
$25–35K	6.2%
$35–50K	12.7%
$50–75K	19.4%
$75–100K	14.8%
$100–150K	18.9%
$150–200K	8.8%
$200K+	4.9%

Age

% of all residents	Value
<10	10.5%
10–19	14.2%
20–24	4.5%
25–34	13.3%
35–44	11.7%
45–54	12.3%
55–64	13.9%
65–74	11.3%
75+	8.4%

Tenure

% of housing units	Value
Owned, with mortgage	49.4%
Owned outright	21.1%
Rented	26.2%
Vacant	3.3%

Type of building

% of housing units	Value
Detached house	78.2%
Townhome	4.1%
2–4 units	5.0%
5–19 units	8.7%
20+ units	3.2%
Mobile / other	0.8%

Businesses in 45231

562 business establishments with 7,532 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 109
Retail Trade: 85
Other Services (except Public Administration): 84
Accommodation and Food Services: 62
Construction: 47
Administrative and Support and Waste Management and Remediation Services: 41
Professional, Scientific, and Technical Services: 28
Finance and Insurance: 18

EDDM carrier routes

45231 has 30 USPS carrier routes with 17,706 residential and 690 business mailboxes. Open the EDDM route map.

Carrier routes in 45231

45231 has 30 USPS carrier routes (30 city (C)) with 17,706 residential and 690 business mailboxes. Routes range from 326 homes (C096) to 887 homes (C093); the median route has 582 homes. The Census counted 16,911 households in 45231 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	3
500–749	25
750–999	2
1,000–1,499	0
1,500+	0

Best routes in 45231 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C075 — USPS business mailboxes 102, 379 homes
Route C065 — USPS business mailboxes 70, 608 homes
Route C073 — USPS business mailboxes 64, 657 homes
Route C083 — USPS business mailboxes 60, 577 homes
Route C080 — USPS business mailboxes 55, 636 homes

Select these 5 routes on the route map

Every carrier route in 45231

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C057	City	598	15	$71,041	—	—	—
C058	City	680	16	$67,496	—	—	—
C059	City	585	34	$43,994	—	—	—
C061	City	561	42	$50,814	—	—	—
C062	City	774	6	$82,362	—	—	—
C063	City	515	52	$82,977	—	—	—
C064	City	712	8	$71,600	—	—	—
C065	City	608	70	$64,128	—	—	—
C066	City	626	3	$73,524	—	—	—
C067	City	576	4	$153,562	—	—	—
C068	City	732	3	$23,473	—	—	—
C069	City	557	5	$69,059	—	—	—
C070	City	559	30	$51,942	—	—	—
C073	City	657	64	$65,833	—	—	—
C075	City	379	102	$153,562	—	—	—
C076	City	588	16	$43,994	—	—	—
C078	City	642	15	$68,983	—	—	—
C080	City	636	55	$73,205	—	—	—
C081	City	534	12	$49,187	—	—	—
C082	City	557	15	$43,994	—	—	—
C083	City	577	60	$36,949	—	—	—
C084	City	518	3	$64,128	—	—	—
C088	City	603	1	$80,771	—	—	—
C089	City	397	18	$80,771	—	—	—
C090	City	542	3	$71,600	—	—	—
C091	City	641	10	$83,124	—	—	—
C092	City	579	19	$104,598	—	—	—
C093	City	887	2	$31,220	—	—	—
C095	City	560	1	$43,994	—	—	—
C096	City	326	6	$31,220	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 45231 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

45218 — Greenhills village, OH (1.5 mi)
45240 — Forest Park city, OH (2.7 mi)
45224 — Cincinnati city, OH (3.1 mi)
45239 — White Oak CDP, OH (3.9 mi)
45251 — Northgate CDP, OH (3.9 mi)
45215 — Wyoming city, OH (4 mi)
45216 — Cincinnati city, OH (4.3 mi)
45232 — Cincinnati city, OH (4.3 mi)

Areas that include 45231

Cincinnati, OH ZIP codes — 46 ZIP codes
Finneytown, OH ZIP codes — 2 ZIP codes
Northbrook, OH ZIP codes — 2 ZIP codes
North College Hill, OH ZIP codes — 3 ZIP codes
Mount Healthy, OH ZIP codes — 1 ZIP code
Pleasant Run, OH ZIP codes — 2 ZIP codes
New Burlington, OH ZIP codes — 2 ZIP codes
Mount Healthy Heights, OH ZIP codes — 1 ZIP code
Pleasant Hills, OH ZIP codes — 1 ZIP code
Skyline Acres, OH ZIP codes — 1 ZIP code
Hamilton County ZIP codes — 55 ZIP codes
Ohio ZIP code data

Where it ranks

Mail every home in 45231

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

Cincinnati EDDM mailing

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 45231, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 45231 in?: 45231 is a Cincinnati, OH mailing address. By land area, 17% lies inside New Burlington, 13% lies inside Finneytown, 10% lies inside Mount Healthy and 5% lies inside Pleasant Run; the rest is outside any Census-defined city or community.
What county is 45231 in?: 45231 is in Hamilton County.
What is the population of 45231?: About 40,463 people (±2,569), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 41,934.
What is the median household income in 45231?: $71,353 (±$3,838), compared with $71,389 for Ohio as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 45231?: 30 USPS carrier routes with 17,706 residential and 690 business mailboxes (18,396 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 45231?: The closest, measured center to center: 45218 (1.5 mi, Greenhills), 45240 (2.7 mi, Forest Park), 45224 (3.1 mi, Cincinnati), 45239 (3.9 mi, White Oak), 45251 (3.9 mi, Northgate) and 45215 (4 mi, Wyoming).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.