What city is 45331 in?

45331 is a Greenville, OH mailing address. By land area, 4% lies inside Greenville; the rest is outside any Census-defined city or community.

What is the population of 45331?

About 22,356 people (±611), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 22,213.

What is the median household income in 45331?

$53,801 (±$4,839), 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 45331?

18 USPS carrier routes with 10,028 residential and 674 business mailboxes (10,700 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 45331?

The closest, measured center to center: 45352 (6 mi, Palestine), 45303 (8 mi, Ansonia), 45328 (8.2 mi, Gettysburg), 45346 (8.6 mi, New Madison), 45332 (9.5 mi, Hollansburg) and 45390 (9.9 mi, Union City).

45331 ZIP Code, Greenville, OH

45331 is a ZIP code in Greenville, Ohio in Darke County. It covers 151 square miles of land. The closest ZIP codes are 45352, 45303 and 45328. 22,356 people live here in 9,912 households. With about 148 people per square mile it is lightly settled, and owners and renters are mixed (65% own). Median household income is $53,801, below the Ohio median of $71,389.

Quick facts

Mailing city: Greenville, OH
County: Darke County
Land area: 151 sq mi
Population: 22,356
Median household income: $53,801
Carrier routes: 18 (10,028 homes)

Key figures

Measure	Value
Residents	22,356
Households	9,912
Median household income	$53,801
Income per person	$32,553
Median age	43.1
Homeowners	64.6%
Median home value	$166,200
Median rent	$767
Bachelor's degree or higher	16.9%
Average commute (minutes)	20.3
Households with kids under 18	26.5%
Moved in the past year	14.0%
Below the poverty line	12.4%
Broadband internet	86.2%
Speak a non-English language at home	1.8%

Household income

% of households	Value
<$10K	6.2%
$10–15K	4.0%
$15–25K	10.9%
$25–35K	9.5%
$35–50K	16.5%
$50–75K	16.6%
$75–100K	13.6%
$100–150K	13.1%
$150–200K	5.7%
$200K+	3.9%

Age

% of all residents	Value
<10	11.0%
10–19	12.9%
20–24	5.8%
25–34	11.6%
35–44	10.6%
45–54	11.0%
55–64	14.4%
65–74	11.6%
75+	11.0%

Tenure

% of housing units	Value
Owned, with mortgage	33.1%
Owned outright	27.9%
Rented	33.1%
Vacant	5.9%

Type of building

% of housing units	Value
Detached house	73.8%
Townhome	2.4%
2–4 units	11.1%
5–19 units	4.8%
20+ units	3.3%
Mobile / other	4.7%

Businesses in 45331

585 business establishments with 10,124 employees (ZIP Codes Business Patterns 2023).

Retail Trade: 103
Other Services (except Public Administration): 84
Health Care and Social Assistance: 60
Accommodation and Food Services: 55
Construction: 48
Finance and Insurance: 41
Professional, Scientific, and Technical Services: 36
Manufacturing: 29

EDDM carrier routes

45331 has 18 USPS carrier routes with 10,028 residential and 674 business mailboxes. Open the EDDM route map.

Carrier routes in 45331

45331 has 18 USPS carrier routes (11 city (C), 7 rural (R)) with 10,028 residential and 674 business mailboxes. Routes range from 428 homes (C004) to 795 homes (C010); the median route has 529 homes. The Census counted 9,912 households in 45331 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	5
500–749	11
750–999	2
1,000–1,499	0
1,500+	0

Best routes in 45331 for…

Most businesses

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

Route C004 — USPS business mailboxes 122, 428 homes
Route C006 — USPS business mailboxes 75, 650 homes
Route C007 — USPS business mailboxes 67, 607 homes
Route C009 — USPS business mailboxes 67, 580 homes
Route C005 — USPS business mailboxes 54, 514 homes

Select these 5 routes on the route map

Every carrier route in 45331

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C002	City	462	37	$45,655	—	—	—
C003	City	543	27	$33,898	—	—	—
C004	City	428	122	$45,655	—	—	—
C005	City	514	54	$39,786	—	—	—
C006	City	650	75	$51,272	—	—	—
C007	City	607	67	$81,670	—	—	—
C008	City	759	19	$104,809	—	—	—
C009	City	580	67	$35,920	—	—	—
C010	City	795	9	$51,272	—	—	—
C012	City	595	24	$64,465	—	—	—
C014	City	562	24	$27,406	—	—	—
R001	Rural	500	41	$75,369	—	—	—
R002	Rural	500	13	$31,880	—	—	—
R003	Rural	491	8	$49,366	—	—	—
R004	Rural	556	4	$54,741	—	—	—
R005	Rural	492	23	$58,966	—	—	—
R006	Rural	492	22	$76,483	—	—	—
R007	Rural	502	38	$31,880	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 45331 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

45352 — Palestine village, OH (6 mi)
45303 — Ansonia village, OH (8 mi)
45328 — Gettysburg village, OH (8.2 mi)
45346 — New Madison village, OH (8.6 mi)
45332 — Hollansburg village, OH (9.5 mi)
45390 — Union City village, OH (9.9 mi)
45308 — Bradford village, OH (10.4 mi)
45304 — Arcanum village, OH (10.5 mi)

Areas that include 45331

Where it ranks

Mail every home in 45331

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.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 45331, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 45331 in?: 45331 is a Greenville, OH mailing address. By land area, 4% lies inside Greenville; the rest is outside any Census-defined city or community.
What county is 45331 in?: 45331 is in Darke County.
What is the population of 45331?: About 22,356 people (±611), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 22,213.
What is the median household income in 45331?: $53,801 (±$4,839), 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 45331?: 18 USPS carrier routes with 10,028 residential and 674 business mailboxes (10,700 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 45331?: The closest, measured center to center: 45352 (6 mi, Palestine), 45303 (8 mi, Ansonia), 45328 (8.2 mi, Gettysburg), 45346 (8.6 mi, New Madison), 45332 (9.5 mi, Hollansburg) and 45390 (9.9 mi, Union City).

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