What city is 06604 in?

06604 is a Bridgeport, CT mailing address. By land area, 100% lies inside Bridgeport.

What is the population of 06604?

About 31,771 people (±1,737), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 30,003.

What is the median household income in 06604?

$50,026 (±$8,969), compared with $95,781 for Connecticut as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 06604?

15 USPS carrier routes with 11,752 residential and 915 business mailboxes (12,814 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 06604?

The closest, measured center to center: 06605 (0.6 mi, Bridgeport), 06607 (2.5 mi, Bridgeport), 06608 (2.7 mi, Bridgeport), 06825 (3.4 mi, Plattsville), 06824 (3.9 mi, Murray) and 06606 (4 mi, Bridgeport).

06604 ZIP Code, Bridgeport, CT

06604 is a ZIP code in Bridgeport, Connecticut in Fairfield County. It covers 3.2 square miles of land. The closest ZIP codes are 06605, 06607 and 06608. 31,771 people live here in 12,534 households, more than in 9 of every 10 Connecticut ZIP codes. It is densely built, at about 10,070 people per square mile, and most households rent (34% own). Median household income is $50,026, well below the Connecticut median of $95,781.

Quick facts

Mailing city: Bridgeport, CT
County: Fairfield County
Land area: 3.2 sq mi
Population: 31,771
Median household income: $50,026
Carrier routes: 15 (11,752 homes)

Key figures

Measure	Value
Residents	31,771
Households	12,534
Median household income	$50,026
Income per person	$28,592
Median age	37
Homeowners	34.1%
Median home value	$267,100
Median rent	$1,498
Bachelor's degree or higher	28.9%
Average commute (minutes)	33
Households with kids under 18	29.0%
Moved in the past year	14.8%
Below the poverty line	22.6%
Broadband internet	84.9%
Speak a non-English language at home	55.6%

Household income

% of households	Value
<$10K	10.0%
$10–15K	7.2%
$15–25K	12.0%
$25–35K	8.9%
$35–50K	11.9%
$50–75K	14.4%
$75–100K	12.3%
$100–150K	16.1%
$150–200K	3.0%
$200K+	4.2%

Age

% of all residents	Value
<10	9.9%
10–19	14.1%
20–24	7.7%
25–34	13.6%
35–44	17.8%
45–54	10.8%
55–64	12.1%
65–74	8.2%
75+	5.7%

Tenure

% of housing units	Value
Owned, with mortgage	21.1%
Owned outright	11.4%
Rented	62.6%
Vacant	5.0%

Type of building

% of housing units	Value
Detached house	14.8%
Townhome	10.8%
2–4 units	32.2%
5–19 units	10.3%
20+ units	31.9%
Mobile / other	0.0%

Businesses in 06604

610 business establishments with 12,742 employees (ZIP Codes Business Patterns 2023).

Other Services (except Public Administration): 96
Professional, Scientific, and Technical Services: 94
Health Care and Social Assistance: 83
Accommodation and Food Services: 69
Retail Trade: 55
Construction: 33
Real Estate and Rental and Leasing: 27
Transportation and Warehousing: 26

EDDM carrier routes

06604 has 15 USPS carrier routes with 11,752 residential and 915 business mailboxes. Open the EDDM route map.

Carrier routes in 06604

06604 has 15 USPS carrier routes (15 city (C)) with 11,752 residential and 915 business mailboxes. Routes range from 490 homes (C025) to 1,198 homes (C033); the median route has 814 homes. The Census counted 12,534 households in 06604 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	1
500–749	4
750–999	9
1,000–1,499	1
1,500+	0

Best routes in 06604 for…

Most businesses

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

Route C042 — USPS business mailboxes 177, 816 homes
Route C031 — USPS business mailboxes 150, 631 homes
Route C013 — USPS business mailboxes 77, 963 homes
Route C025 — USPS business mailboxes 72, 490 homes
Route C014 — USPS business mailboxes 69, 808 homes

Select these 5 routes on the route map

Every carrier route in 06604

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C010	City	549	20	$59,094	—	—	—
C013	City	963	77	$48,317	—	—	—
C014	City	808	69	$66,712	—	—	—
C023	City	782	43	$33,035	—	—	—
C025	City	490	72	$17,701	—	—	—
C026	City	566	60	$48,317	—	—	—
C031	City	631	150	$33,035	—	—	—
C032	City	928	19	$200,001+	—	—	—
C033	City	1,198	32	$32,769	—	—	—
C034	City	882	28	$33,486	—	—	—
C035	City	817	37	$59,094	—	—	—
C039	City	814	20	$33,486	—	—	—
C040	City	583	51	$48,238	—	—	—
C042	City	816	177	$23,832	—	—	—
C047	City	925	60	$16,444	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 06604 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

06605 — Bridgeport city, CT (0.6 mi)
06607 — Bridgeport city, CT (2.5 mi)
06608 — Bridgeport city, CT (2.7 mi)
06825 — Plattsville CDP, CT (3.4 mi)
06824 — Murray CDP, CT (3.9 mi)
06606 — Bridgeport city, CT (4 mi)
06890 — Southport CDP, CT (4 mi)
06615 — Lordship CDP, CT (4.3 mi)

Areas that include 06604

Bridgeport, CT ZIP codes — 6 ZIP codes
Fairfield County ZIP codes — 46 ZIP codes
Connecticut ZIP code data

Where it ranks

Mail every home in 06604

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) 06604, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 06604 in?: 06604 is a Bridgeport, CT mailing address. By land area, 100% lies inside Bridgeport.
What county is 06604 in?: 06604 is in Fairfield County.
What is the population of 06604?: About 31,771 people (±1,737), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 30,003.
What is the median household income in 06604?: $50,026 (±$8,969), compared with $95,781 for Connecticut as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 06604?: 15 USPS carrier routes with 11,752 residential and 915 business mailboxes (12,814 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 06604?: The closest, measured center to center: 06605 (0.6 mi, Bridgeport), 06607 (2.5 mi, Bridgeport), 06608 (2.7 mi, Bridgeport), 06825 (3.4 mi, Plattsville), 06824 (3.9 mi, Murray) and 06606 (4 mi, Bridgeport).

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