What city is 01604 in?

01604 is a Worcester, MA mailing address. By land area, 100% lies inside Worcester.

What is the population of 01604?

About 39,812 people (±1,894), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 41,301.

What is the median household income in 01604?

$73,505 (±$4,087), 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 01604?

27 USPS carrier routes with 15,614 residential and 1,099 business mailboxes (16,709 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 01604?

The closest, measured center to center: 01608 (1.8 mi, Worcester), 01610 (2.1 mi, Worcester), 01607 (2.2 mi, Worcester), 01605 (2.7 mi, Worcester), 01545 (3.5 mi, Worcester) and 01603 (3.9 mi, Worcester).

01604 ZIP Code, Worcester, MA

01604 is a ZIP code in Worcester, Massachusetts in Worcester County. It covers 6.6 square miles of land. The closest ZIP codes are 01608, 01610 and 01607. 39,812 people live here in 16,853 households, more than in 9 of every 10 Massachusetts ZIP codes. At about 6,001 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (44% own). Median household income is $73,505, below the Massachusetts median of $103,960.

Quick facts

Mailing city: Worcester, MA
County: Worcester County
Land area: 6.6 sq mi
Population: 39,812
Median household income: $73,505
Carrier routes: 27 (15,614 homes)

Key figures

Measure	Value
Residents	39,812
Households	16,853
Median household income	$73,505
Income per person	$40,986
Median age	37.4
Homeowners	44.1%
Median home value	$352,500
Median rent	$1,584
Bachelor's degree or higher	32.8%
Average commute (minutes)	24.2
Households with kids under 18	27.9%
Moved in the past year	12.0%
Below the poverty line	18.9%
Broadband internet	92.0%
Speak a non-English language at home	38.5%

Household income

% of households	Value
<$10K	4.6%
$10–15K	4.9%
$15–25K	7.7%
$25–35K	6.5%
$35–50K	10.3%
$50–75K	17.3%
$75–100K	14.1%
$100–150K	17.8%
$150–200K	8.6%
$200K+	8.2%

Age

% of all residents	Value
<10	10.8%
10–19	10.7%
20–24	5.6%
25–34	19.3%
35–44	15.5%
45–54	9.9%
55–64	12.8%
65–74	8.8%
75+	6.7%

Tenure

% of housing units	Value
Owned, with mortgage	27.5%
Owned outright	13.5%
Rented	51.0%
Vacant	8.0%

Type of building

% of housing units	Value
Detached house	30.6%
Townhome	6.7%
2–4 units	38.1%
5–19 units	12.7%
20+ units	11.6%
Mobile / other	0.1%

Businesses in 01604

744 business establishments with 12,170 employees (ZIP Codes Business Patterns 2023).

Accommodation and Food Services: 124
Retail Trade: 109
Other Services (except Public Administration): 93
Health Care and Social Assistance: 83
Construction: 62
Real Estate and Rental and Leasing: 43
Administrative and Support and Waste Management and Remediation Services: 41
Professional, Scientific, and Technical Services: 40

EDDM carrier routes

01604 has 27 USPS carrier routes with 15,614 residential and 1,099 business mailboxes. Open the EDDM route map.

Carrier routes in 01604

01604 has 27 USPS carrier routes (27 city (C)) with 15,614 residential and 1,099 business mailboxes. Routes range from 258 homes (C033) to 802 homes (C031); the median route has 636 homes. The Census counted 16,853 households in 01604 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	9
500–749	17
750–999	1
1,000–1,499	0
1,500+	0

Best routes in 01604 for…

Most businesses

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

Route C002 — USPS business mailboxes 226, 502 homes
Route C025 — USPS business mailboxes 193, 345 homes
Route C031 — USPS business mailboxes 130, 802 homes
Route C019 — USPS business mailboxes 98, 688 homes
Route C014 — USPS business mailboxes 72, 709 homes

Select these 5 routes on the route map

Every carrier route in 01604

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	517	2	$88,145	—	—	—
C002	City	502	226	$40,891	—	—	—
C003	City	735	2	$76,241	—	—	—
C004	City	636	26	$76,241	—	—	—
C005	City	474	5	$77,714	—	—	—
C007	City	726	13	$58,243	—	—	—
C008	City	720	41	$80,290	—	—	—
C009	City	540	11	$52,246	—	—	—
C010	City	692	15	$77,891	—	—	—
C011	City	718	9	$19,337	—	—	—
C012	City	711	27	$83,699	—	—	—
C013	City	426	1	$67,473	—	—	—
C014	City	709	72	$76,241	—	—	—
C018	City	456	10	$58,243	—	—	—
C019	City	688	98	$58,243	—	—	—
C020	City	636	21	$67,473	—	—	—
C021	City	669	6	$58,243	—	—	—
C022	City	420	3	$80,290	—	—	—
C024	City	636	39	$103,283	—	—	—
C025	City	345	193	$85,901	—	—	—
C026	City	489	15	$85,901	—	—	—
C028	City	467	2	$80,290	—	—	—
C029	City	486	58	$75,244	—	—	—
C030	City	503	8	$103,283	—	—	—
C031	City	802	130	$44,698	—	—	—
C033	City	258	59	$40,891	—	—	—
C034	City	653	7	$77,714	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 01604 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

01608 — Worcester city, MA (1.8 mi)
01610 — Worcester city, MA (2.1 mi)
01607 — Worcester city, MA (2.2 mi)
01605 — Worcester city, MA (2.7 mi)
01545 — Worcester city, MA (3.5 mi)
01603 — Worcester city, MA (3.9 mi)
01609 — Worcester city, MA (3.9 mi)
01536 (4.1 mi)

Areas that include 01604

Worcester, MA ZIP codes — 9 ZIP codes
Worcester County ZIP codes — 86 ZIP codes
Massachusetts ZIP code data

Where it ranks

Mail every home in 01604

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) 01604, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 01604 in?: 01604 is a Worcester, MA mailing address. By land area, 100% lies inside Worcester.
What county is 01604 in?: 01604 is in Worcester County.
What is the population of 01604?: About 39,812 people (±1,894), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 41,301.
What is the median household income in 01604?: $73,505 (±$4,087), 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 01604?: 27 USPS carrier routes with 15,614 residential and 1,099 business mailboxes (16,709 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 01604?: The closest, measured center to center: 01608 (1.8 mi, Worcester), 01610 (2.1 mi, Worcester), 01607 (2.2 mi, Worcester), 01605 (2.7 mi, Worcester), 01545 (3.5 mi, Worcester) and 01603 (3.9 mi, Worcester).

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