What city is 20904 in?

20904 is a Silver Spring, MD mailing address. By land area, 37% lies inside Colesville, 23% lies inside Calverton, 22% lies inside Fairland and 14% lies inside White Oak.

What is the population of 20904?

About 58,646 people (±2,626), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 59,051.

What is the median household income in 20904?

$96,025 (±$4,028), compared with $103,678 for Maryland as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 20904?

38 USPS carrier routes with 21,983 residential and 669 business mailboxes (22,652 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 20904?

The closest, measured center to center: 20905 (2.8 mi, Cloverly), 20903 (3.4 mi, Hillandale), 20866 (3.6 mi, Burtonsville), 20901 (3.8 mi, Silver Spring), 20868 (3.9 mi, Burtonsville) and 20902 (3.9 mi, Wheaton).

20904 ZIP Code, Silver Spring, MD

20904 is a ZIP code in Silver Spring, Maryland in Montgomery County. It covers 14 square miles of land. The closest ZIP codes are 20905, 20903 and 20866. 58,646 people live here in 21,212 households, more than in 9 of every 10 Maryland ZIP codes. At about 4,272 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (49% own). Median household income is $96,025, close to the Maryland median of $103,678.

Quick facts

Mailing city: Silver Spring, MD
County: Montgomery County
Land area: 14 sq mi
Population: 58,646
Median household income: $96,025
Carrier routes: 38 (21,983 homes)

Key figures

Measure	Value
Residents	58,646
Households	21,212
Median household income	$96,025
Income per person	$49,492
Median age	40.6
Homeowners	48.9%
Median home value	$560,000
Median rent	$1,918
Bachelor's degree or higher	50.3%
Average commute (minutes)	32.7
Households with kids under 18	32.2%
Moved in the past year	13.1%
Below the poverty line	9.3%
Broadband internet	90.3%
Speak a non-English language at home	46.5%

Household income

% of households	Value
<$10K	3.4%
$10–15K	1.7%
$15–25K	3.6%
$25–35K	5.1%
$35–50K	10.6%
$50–75K	14.3%
$75–100K	13.7%
$100–150K	16.9%
$150–200K	10.5%
$200K+	20.2%

Age

% of all residents	Value
<10	12.3%
10–19	12.3%
20–24	6.8%
25–34	11.4%
35–44	12.8%
45–54	11.9%
55–64	11.7%
65–74	10.4%
75+	10.4%

Tenure

% of housing units	Value
Owned, with mortgage	32.0%
Owned outright	15.0%
Rented	48.3%
Vacant	4.7%

Type of building

% of housing units	Value
Detached house	35.2%
Townhome	15.4%
2–4 units	1.8%
5–19 units	25.3%
20+ units	22.2%
Mobile / other	0.1%

Businesses in 20904

970 business establishments with 15,865 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 202
Professional, Scientific, and Technical Services: 130
Construction: 102
Retail Trade: 99
Other Services (except Public Administration): 88
Accommodation and Food Services: 79
Administrative and Support and Waste Management and Remediation Services: 64
Real Estate and Rental and Leasing: 47

EDDM carrier routes

20904 has 38 USPS carrier routes with 21,983 residential and 669 business mailboxes. Open the EDDM route map.

Carrier routes in 20904

20904 has 38 USPS carrier routes (38 city (C)) with 21,983 residential and 669 business mailboxes. Routes range from 277 homes (C054) to 1,582 homes (C063); the median route has 527 homes. The Census counted 21,212 households in 20904 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	16
500–749	18
750–999	3
1,000–1,499	0
1,500+	1

Best routes in 20904 for…

Most businesses

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

Route C029 — USPS business mailboxes 115, 737 homes
Route C003 — USPS business mailboxes 108, 294 homes
Route C022 — USPS business mailboxes 65, 385 homes
Route C025 — USPS business mailboxes 59, 527 homes
Route C054 — USPS business mailboxes 52, 277 homes

Select these 5 routes on the route map

Every carrier route in 20904

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	532	0	$109,932	—	—	—
C003	City	294	108	$120,800	—	—	—
C004	City	526	1	$110,805	—	—	—
C005	City	491	0	$97,161	—	—	—
C006	City	856	2	$42,334	—	—	—
C007	City	366	4	$179,246	—	—	—
C011	City	698	1	$102,120	—	—	—
C012	City	370	0	$128,931	—	—	—
C015	City	392	19	$131,235	—	—	—
C016	City	326	36	$162,877	—	—	—
C017	City	600	1	$97,161	—	—	—
C021	City	841	38	$53,233	—	—	—
C022	City	385	65	$126,107	—	—	—
C023	City	739	3	$71,527	—	—	—
C025	City	527	59	$136,047	—	—	—
C026	City	683	12	$120,800	—	—	—
C028	City	656	15	$103,417	—	—	—
C029	City	737	115	$75,085	—	—	—
C031	City	386	39	$102,120	—	—	—
C032	City	465	1	$109,932	—	—	—
C033	City	469	0	$200,001+	—	—	—
C037	City	726	18	$76,037	—	—	—
C039	City	734	36	$61,561	—	—	—
C043	City	423	7	$155,348	—	—	—
C044	City	396	0	$179,246	—	—	—
C045	City	447	3	$129,153	—	—	—
C047	City	640	1	$102,120	—	—	—
C049	City	678	2	$84,737	—	—	—
C050	City	665	1	$102,120	—	—	—
C052	City	503	0	$200,001+	—	—	—
C053	City	462	3	$194,383	—	—	—
C054	City	277	52	$200,001+	—	—	—
C055	City	567	3	$136,047	—	—	—
C058	City	516	8	$155,348	—	—	—
C060	City	693	2	$76,037	—	—	—
C061	City	497	0	$152,079	—	—	—
C062	City	838	1	$102,634	—	—	—
C063	City	1,582	13	$162,877	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 20904 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

20905 — Cloverly CDP, MD (2.8 mi)
20903 — Hillandale CDP, MD (3.4 mi)
20866 — Burtonsville CDP, MD (3.6 mi)
20901 — Silver Spring CDP, MD (3.8 mi)
20868 — Burtonsville CDP, MD (3.9 mi)
20902 — Wheaton CDP, MD (3.9 mi)
20906 — Aspen Hill CDP, MD (4.3 mi)
20705 — Beltsville CDP, MD (4.5 mi)

Areas that include 20904

Silver Spring, MD ZIP codes — 8 ZIP codes
Fairland, MD ZIP codes — 3 ZIP codes
Calverton, MD ZIP codes — 2 ZIP codes
White Oak, MD ZIP codes — 3 ZIP codes
Colesville, MD ZIP codes — 1 ZIP code
Montgomery County ZIP codes — 48 ZIP codes
Maryland ZIP code data

Where it ranks

Mail every home in 20904

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) 20904, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 20904 in?: 20904 is a Silver Spring, MD mailing address. By land area, 37% lies inside Colesville, 23% lies inside Calverton, 22% lies inside Fairland and 14% lies inside White Oak.
What county is 20904 in?: 20904 is in Montgomery County.
What is the population of 20904?: About 58,646 people (±2,626), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 59,051.
What is the median household income in 20904?: $96,025 (±$4,028), compared with $103,678 for Maryland as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 20904?: 38 USPS carrier routes with 21,983 residential and 669 business mailboxes (22,652 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 20904?: The closest, measured center to center: 20905 (2.8 mi, Cloverly), 20903 (3.4 mi, Hillandale), 20866 (3.6 mi, Burtonsville), 20901 (3.8 mi, Silver Spring), 20868 (3.9 mi, Burtonsville) and 20902 (3.9 mi, Wheaton).

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