What city is 01128 in?

01128 is a Springfield, MA mailing address. By land area, 100% lies inside Springfield.

What is the population of 01128?

About 2,896 people (±840), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,647.

What is the median household income in 01128?

$100,313 (±$26,823), compared with $103,960 for Massachusetts as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 01128?

2 USPS carrier routes with 1,108 residential and 47 business mailboxes (1,154 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 01128?

The closest, measured center to center: 01129 (1.8 mi, Springfield), 01118 (1.9 mi, Springfield), 01028 (2.1 mi, Springfield), 01119 (2.5 mi, Springfield), 01109 (3.6 mi, Springfield) and 01108 (3.7 mi, Springfield).

01128 ZIP Code, Springfield, MA

01128 is a ZIP code in Springfield, Massachusetts in Hampden County. It covers 1.1 square miles of land. The closest ZIP codes are 01129, 01118 and 01028. 2,896 people live here in 1,022 households. At about 2,611 people per square mile it has suburban density, and most homes are owner-occupied (94%). Median household income is $100,313, close to the Massachusetts median of $103,960.

Quick facts

Mailing city: Springfield, MA
County: Hampden County
Land area: 1.1 sq mi
Population: 2,896
Median household income: $100,313
Carrier routes: 2 (1,108 homes)

Key figures

Measure	Value
Residents	2,896
Households	1,022
Median household income	$100,313
Income per person	$43,355
Median age	39.6
Homeowners	94.1%
Median home value	$272,100
Median rent	not published
Bachelor's degree or higher	40.3%
Average commute (minutes)	23
Households with kids under 18	30.1%
Moved in the past year	6.1%
Below the poverty line	6.9%
Broadband internet	93.5%
Speak a non-English language at home	20.7%

Household income

% of households	Value
<$10K	6.1%
$10–15K	0.0%
$15–25K	2.0%
$25–35K	3.6%
$35–50K	5.0%
$50–75K	17.9%
$75–100K	15.2%
$100–150K	27.0%
$150–200K	8.3%
$200K+	15.0%

Age

% of all residents	Value
<10	17.7%
10–19	10.0%
20–24	3.6%
25–34	9.7%
35–44	12.5%
45–54	16.0%
55–64	12.8%
65–74	10.1%
75+	7.5%

Tenure

% of housing units	Value
Owned, with mortgage	68.7%
Owned outright	25.7%
Rented	5.6%
Vacant	0.0%

Type of building

% of housing units	Value
Detached house	100.0%
Townhome	0.0%
2–4 units	0.0%
5–19 units	0.0%
20+ units	0.0%
Mobile / other	0.0%

Businesses in 01128

40 business establishments with 824 employees (ZIP Codes Business Patterns 2023).

Accommodation and Food Services: 11
Health Care and Social Assistance: 9
Retail Trade: 8
Construction: 3
Other Services (except Public Administration): 3

EDDM carrier routes

01128 has 2 USPS carrier routes with 1,108 residential and 47 business mailboxes. Open the EDDM route map.

Carrier routes in 01128

01128 has 2 USPS carrier routes (2 city (C)) with 1,108 residential and 47 business mailboxes. Routes range from 532 homes (C034) to 576 homes (C036); the median route has 554 homes. The Census counted 1,022 households in 01128 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

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

Every carrier route in 01128

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C034	City	532	47	$87,125	—	—	—
C036	City	576	0	$80,189	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 01128 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

01129 — Springfield city, MA (1.8 mi)
01118 — Springfield city, MA (1.9 mi)
01028 — Springfield city, MA (2.1 mi)
01119 — Springfield city, MA (2.5 mi)
01109 — Springfield city, MA (3.6 mi)
01108 — Springfield city, MA (3.7 mi)
01036 (3.9 mi)
01151 — Springfield city, MA (4.2 mi)

Areas that include 01128

Springfield, MA ZIP codes — 12 ZIP codes
Hampden County ZIP codes — 40 ZIP codes
Massachusetts ZIP code data

Where it ranks

Mail every home in 01128

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) 01128, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 01128 in?: 01128 is a Springfield, MA mailing address. By land area, 100% lies inside Springfield.
What county is 01128 in?: 01128 is in Hampden County.
What is the population of 01128?: About 2,896 people (±840), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,647.
What is the median household income in 01128?: $100,313 (±$26,823), compared with $103,960 for Massachusetts as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 01128?: 2 USPS carrier routes with 1,108 residential and 47 business mailboxes (1,154 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 01128?: The closest, measured center to center: 01129 (1.8 mi, Springfield), 01118 (1.9 mi, Springfield), 01028 (2.1 mi, Springfield), 01119 (2.5 mi, Springfield), 01109 (3.6 mi, Springfield) and 01108 (3.7 mi, Springfield).

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