What city is 28120 in?

28120 is a Mount Holly, NC mailing address. By land area, 31% lies inside Mount Holly; the rest is outside any Census-defined city or community.

What is the population of 28120?

About 25,805 people (±863), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 24,017.

What is the median household income in 28120?

$78,231 (±$5,289), compared with $72,388 for North Carolina as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 28120?

17 USPS carrier routes with 10,992 residential and 301 business mailboxes (11,295 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 28120?

The closest, measured center to center: 28164 (4.2 mi, Lowesville), 28214 (5.1 mi, Charlotte), 28101 (5.7 mi, McAdenville), 28098 (5.8 mi, Lowell), 28006 (6.8 mi, Alexis) and 28032 (7.2 mi, Cramerton).

28120 ZIP Code, Mount Holly, NC

28120 is a ZIP code in Mount Holly, North Carolina in Gaston County. It covers 31 square miles of land. The closest ZIP codes are 28164, 28214 and 28101. 25,805 people live here in 10,241 households. With about 823 people per square mile it is lightly settled, and most homes are owner-occupied (75%). Median household income is $78,231, close to the North Carolina median of $72,388.

Quick facts

Mailing city: Mount Holly, NC
County: Gaston County
Land area: 31 sq mi
Population: 25,805
Median household income: $78,231
Carrier routes: 17 (10,992 homes)

Key figures

Measure	Value
Residents	25,805
Households	10,241
Median household income	$78,231
Income per person	$41,978
Median age	40.4
Homeowners	74.7%
Median home value	$321,500
Median rent	$1,234
Bachelor's degree or higher	33.8%
Average commute (minutes)	27.4
Households with kids under 18	32.8%
Moved in the past year	8.5%
Below the poverty line	12.2%
Broadband internet	93.2%
Speak a non-English language at home	8.4%

Household income

% of households	Value
<$10K	7.0%
$10–15K	2.8%
$15–25K	4.7%
$25–35K	6.8%
$35–50K	10.0%
$50–75K	16.7%
$75–100K	12.7%
$100–150K	17.8%
$150–200K	11.9%
$200K+	9.5%

Age

% of all residents	Value
<10	11.7%
10–19	12.5%
20–24	5.8%
25–34	11.5%
35–44	14.6%
45–54	15.3%
55–64	13.6%
65–74	9.6%
75+	5.3%

Tenure

% of housing units	Value
Owned, with mortgage	47.8%
Owned outright	22.8%
Rented	23.7%
Vacant	5.7%

Type of building

% of housing units	Value
Detached house	78.4%
Townhome	3.2%
2–4 units	3.1%
5–19 units	5.3%
20+ units	1.5%
Mobile / other	8.4%

Businesses in 28120

388 business establishments with 5,963 employees (ZIP Codes Business Patterns 2023).

Construction: 63
Other Services (except Public Administration): 50
Professional, Scientific, and Technical Services: 37
Administrative and Support and Waste Management and Remediation Services: 33
Retail Trade: 31
Health Care and Social Assistance: 28
Accommodation and Food Services: 28
Finance and Insurance: 21

EDDM carrier routes

28120 has 17 USPS carrier routes with 10,992 residential and 301 business mailboxes. Open the EDDM route map.

Carrier routes in 28120

28120 has 17 USPS carrier routes (8 city (C), 9 rural (R)) with 10,992 residential and 301 business mailboxes. Routes range from 155 homes (C010) to 970 homes (R014); the median route has 722 homes. The Census counted 10,241 households in 28120 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	3
500–749	7
750–999	6
1,000–1,499	0
1,500+	0

Best routes in 28120 for…

Most businesses

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

Route C004 — USPS business mailboxes 64, 495 homes
Route C006 — USPS business mailboxes 36, 765 homes
Route C005 — USPS business mailboxes 31, 640 homes
Route R003 — USPS business mailboxes 28, 770 homes
Route C001 — USPS business mailboxes 28, 468 homes

Select these 5 routes on the route map

Every carrier route in 28120

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	468	28	$44,862	—	—	—
C002	City	808	14	$29,343	—	—	—
C003	City	722	5	$83,908	—	—	—
C004	City	495	64	$59,376	—	—	—
C005	City	640	31	$88,489	—	—	—
C006	City	765	36	$79,658	—	—	—
C008	City	736	19	$61,574	—	—	—
C010	City	155	0	$97,865	—	—	—
R001	Rural	750	20	$80,724	—	—	—
R002	Rural	805	7	$60,478	—	—	—
R003	Rural	770	28	$99,813	—	—	—
R004	Rural	665	12	$46,736	—	—	—
R005	Rural	608	3	$60,478	—	—	—
R006	Rural	570	11	$97,865	—	—	—
R007	Rural	748	7	$99,813	—	—	—
R014	Rural	970	0	$46,736	—	—	—
R015	Rural	317	16	$99,813	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 28120 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

28164 — Lowesville CDP, NC (4.2 mi)
28214 — Charlotte city, NC (5.1 mi)
28101 — McAdenville town, NC (5.7 mi)
28098 — Lowell city, NC (5.8 mi)
28006 — Alexis CDP, NC (6.8 mi)
28032 — Cramerton town, NC (7.2 mi)
28216 — Charlotte city, NC (7.8 mi)
28012 — Belmont city, NC (8.1 mi)

Areas that include 28120

Where it ranks

Mail every home in 28120

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) 28120, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 28120 in?: 28120 is a Mount Holly, NC mailing address. By land area, 31% lies inside Mount Holly; the rest is outside any Census-defined city or community.
What county is 28120 in?: 28120 is in Gaston County.
What is the population of 28120?: About 25,805 people (±863), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 24,017.
What is the median household income in 28120?: $78,231 (±$5,289), compared with $72,388 for North Carolina as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 28120?: 17 USPS carrier routes with 10,992 residential and 301 business mailboxes (11,295 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 28120?: The closest, measured center to center: 28164 (4.2 mi, Lowesville), 28214 (5.1 mi, Charlotte), 28101 (5.7 mi, McAdenville), 28098 (5.8 mi, Lowell), 28006 (6.8 mi, Alexis) and 28032 (7.2 mi, Cramerton).

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