48104 ZIP Code, Ann Arbor, MI

48104 is a ZIP code in Ann Arbor, Michigan in Washtenaw County. It covers 7.8 square miles of land. The closest ZIP codes are 48109, 48108 and 48105. 43,979 people live here in 17,526 households, more than in 9 of every 10 Michigan ZIP codes. At about 5,642 people per square mile it is built up to city-neighborhood density, and most households rent (37% own). Median household income is $64,231, below the Michigan median of $72,875; the median age is 22.9, younger than most ZIP codes.

Quick facts

Key figures

MeasureValue
Residents43,979
Households17,526
Median household income$64,231
Income per person$52,000
Median age22.9
Homeowners36.9%
Median home value$491,200
Median rent$1,639
Bachelor's degree or higher80.9%
Average commute (minutes)18.8
Households with kids under 1811.4%
Moved in the past year46.2%
Below the poverty line36.3%
Broadband internet94.0%
Speak a non-English language at home17.8%

Household income

% of householdsValue
<$10K13.3%
$10–15K3.4%
$15–25K7.0%
$25–35K6.7%
$35–50K9.4%
$50–75K14.3%
$75–100K7.7%
$100–150K13.6%
$150–200K7.1%
$200K+17.6%

Age

% of all residentsValue
<104.0%
10–1917.2%
20–2437.2%
25–3411.8%
35–446.9%
45–546.4%
55–647.2%
65–745.1%
75+4.0%

Tenure

% of housing unitsValue
Owned, with mortgage21.6%
Owned outright12.4%
Rented56.9%
Vacant9.1%

Type of building

% of housing unitsValue
Detached house36.3%
Townhome6.4%
2–4 units11.0%
5–19 units23.1%
20+ units22.8%
Mobile / other0.5%

Businesses in 48104

1,527 business establishments with 23,935 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

48104 has 36 USPS carrier routes with 19,118 residential and 2,048 business mailboxes. Open the EDDM route map.

Carrier routes in 48104

48104 has 36 USPS carrier routes (36 city (C)) with 19,118 residential and 2,048 business mailboxes. Routes range from 154 homes (C088) to 1,144 homes (C042); the median route has 514 homes. The Census counted 17,526 households in 48104 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2494
250–49913
500–74911
750–9995
1,000–1,4993
1,500+0

Best routes in 48104 for…

Most businesses

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

  1. Route C013 — USPS business mailboxes 299, 156 homes
  2. Route C020 — USPS business mailboxes 250, 1,136 homes
  3. Route C016 — USPS business mailboxes 210, 543 homes
  4. Route C014 — USPS business mailboxes 158, 392 homes
  5. Route C040 — USPS business mailboxes 131, 519 homes

Select these 5 routes on the route map

Every carrier route in 48104

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C001City1,10729$147,332———
C008City879121$62,266———
C009City3121$200,001+———
C013City156299$62,266———
C014City392158$62,266———
C016City543210$62,266———
C018City5592$85,576———
C019City3731$73,254———
C020City1,136250$62,266———
C022City57695$140,267———
C023City3401$200,001+———
C027City3531$48,452———
C028City30145$200,001+———
C039City690113$78,847———
C040City519131$118,716———
C042City1,14486$96,460———
C043City79422$13,494———
C044City2072$155,066———
C045City5246$53,773———
C046City52018$37,069———
C047City2240$164,652———
C050City4693$96,460———
C051City4783$83,125———
C053City2500$200,001+———
C054City32516————
C056City50818$96,460———
C057City2757$87,870———
C068City52687$71,723———
C071City3171$200,001+———
C073City57122$72,924———
C088City154104$85,576———
C089City87822$22,103———
C091City76722$83,125———
C092City67974$87,870———
C093City38739$87,870———
C094City88539$37,069———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 48104 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

Areas that include 48104

Where it ranks

Mail every home in 48104

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) 48104, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 48104 in?
48104 is a Ann Arbor, MI mailing address. By land area, 95% lies inside Ann Arbor; the rest is outside any Census-defined city or community.
What county is 48104 in?
48104 is in Washtenaw County.
What is the population of 48104?
About 43,979 people (±1,918), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 41,588.
What is the median household income in 48104?
$64,231 (±$6,689), compared with $72,875 for Michigan as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 48104?
36 USPS carrier routes with 19,118 residential and 2,048 business mailboxes (21,169 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 48104?
The closest, measured center to center: 48109 (2.1 mi, Ann Arbor), 48108 (2.9 mi, Ann Arbor), 48105 (4.6 mi, Ann Arbor), 48197 (6.1 mi, Ypsilanti), 48103 (6.6 mi, Ann Arbor) and 48198 (6.7 mi, Ypsilanti).

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