What city is 04355 in?

04355 is a Readfield, ME mailing address. None of its land lies inside a Census-defined city or community.

What is the population of 04355?

About 2,651 people (±18), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,597.

What is the median household income in 04355?

$86,504 (±$7,573), compared with $74,733 for Maine as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 04355?

2 USPS carrier routes with 901 residential and 14 business mailboxes (911 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 04355?

The closest, measured center to center: 04351 (5.2 mi), 04364 (5.2 mi, Winthrop), 04284 (5.7 mi), 04352 (5.7 mi), 04349 (6.7 mi) and 04265 (8.4 mi).

04355 ZIP Code, Readfield, ME

04355 is a ZIP code in Readfield, Maine in Kennebec County. It covers 29 square miles of land. The closest ZIP codes are 04351, 04364 and 04284. 2,651 people live here in 1,027 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (90%). Median household income is $86,504, above the Maine median of $74,733; the median age is 48.1, older than most ZIP codes.

Quick facts

Mailing city: Readfield, ME
County: Kennebec County
Land area: 29 sq mi
Population: 2,651
Median household income: $86,504
Carrier routes: 2 (901 homes)

Key figures

Measure	Value
Residents	2,651
Households	1,027
Median household income	$86,504
Income per person	$41,938
Median age	48.1
Homeowners	89.9%
Median home value	$326,400
Median rent	$1,125
Bachelor's degree or higher	48.8%
Average commute (minutes)	29.5
Households with kids under 18	27.6%
Moved in the past year	9.4%
Below the poverty line	5.0%
Broadband internet	96.2%
Speak a non-English language at home	1.4%

Household income

% of households	Value
<$10K	3.6%
$10–15K	0.8%
$15–25K	3.1%
$25–35K	1.9%
$35–50K	15.2%
$50–75K	16.4%
$75–100K	18.3%
$100–150K	24.1%
$150–200K	10.9%
$200K+	5.7%

Age

% of all residents	Value
<10	10.6%
10–19	10.4%
20–24	5.2%
25–34	11.7%
35–44	10.8%
45–54	12.9%
55–64	16.1%
65–74	18.1%
75+	4.2%

Tenure

% of housing units	Value
Owned, with mortgage	41.7%
Owned outright	26.4%
Rented	7.4%
Vacant	24.5%

Type of building

% of housing units	Value
Detached house	86.9%
Townhome	0.0%
2–4 units	6.5%
5–19 units	0.0%
20+ units	0.0%
Mobile / other	6.5%

Businesses in 04355

37 business establishments with 191 employees (ZIP Codes Business Patterns 2023).

Construction: 10
Administrative and Support and Waste Management and Remediation Services: 5
Accommodation and Food Services: 3
Other Services (except Public Administration): 3

EDDM carrier routes

04355 has 2 USPS carrier routes with 901 residential and 14 business mailboxes. Open the EDDM route map.

Carrier routes in 04355

04355 has 2 USPS carrier routes (2 rural (R)) with 901 residential and 14 business mailboxes. Routes range from 411 homes (R002) to 490 homes (R001); the median route has 451 homes. The Census counted 1,027 households in 04355 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

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

Best routes in 04355 for…

Most businesses

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

Route R001 — USPS business mailboxes 8, 490 homes
Route R002 — USPS business mailboxes 6, 411 homes

Select these 2 routes on the route map

Every carrier route in 04355

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R001	Rural	490	8	$102,204	—	—	—
R002	Rural	411	6	$98,307	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 04355 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

04351 (5.2 mi)
04364 — Winthrop CDP, ME (5.2 mi)
04284 (5.7 mi)
04352 (5.7 mi)
04349 (6.7 mi)
04265 (8.4 mi)
04917 (9 mi)
04347 — Hallowell city, ME (9.4 mi)

Areas that include 04355

Readfield, ME ZIP codes — 1 ZIP code
Kennebec County ZIP codes — 27 ZIP codes
Maine ZIP code data

Where it ranks

Mail every home in 04355

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) 04355, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 04355 in?: 04355 is a Readfield, ME mailing address. None of its land lies inside a Census-defined city or community.
What county is 04355 in?: 04355 is in Kennebec County.
What is the population of 04355?: About 2,651 people (±18), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,597.
What is the median household income in 04355?: $86,504 (±$7,573), compared with $74,733 for Maine as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 04355?: 2 USPS carrier routes with 901 residential and 14 business mailboxes (911 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 04355?: The closest, measured center to center: 04351 (5.2 mi), 04364 (5.2 mi, Winthrop), 04284 (5.7 mi), 04352 (5.7 mi), 04349 (6.7 mi) and 04265 (8.4 mi).

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