48118 ZIP Code, Chelsea, MI
48118 is a ZIP code in Chelsea, Michigan in Washtenaw County. It covers 86 square miles of land. The closest ZIP codes are 48130, 49240 and 48103. 13,246 people live here in 5,733 households. With about 154 people per square mile it is lightly settled, and most homes are owner-occupied (80%). Median household income is $88,278, above the Michigan median of $72,875; the median age is 48.3, older than most ZIP codes.
Quick facts
- Mailing city: Chelsea, MI
- County: Washtenaw County
- Land area: 86 sq mi
- Population: 13,246
- Median household income: $88,278
- Carrier routes: 11 (5,998 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 13,246 |
| Households | 5,733 |
| Median household income | $88,278 |
| Income per person | $52,799 |
| Median age | 48.3 |
| Homeowners | 80.2% |
| Median home value | $357,200 |
| Median rent | $1,636 |
| Bachelor's degree or higher | 51.3% |
| Average commute (minutes) | 27 |
| Households with kids under 18 | 25.5% |
| Moved in the past year | 10.6% |
| Below the poverty line | 3.0% |
| Broadband internet | 92.3% |
| Speak a non-English language at home | 2.7% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.7% |
| $10–15K | 1.8% |
| $15–25K | 2.3% |
| $25–35K | 6.7% |
| $35–50K | 11.2% |
| $50–75K | 17.3% |
| $75–100K | 11.5% |
| $100–150K | 19.2% |
| $150–200K | 11.2% |
| $200K+ | 16.2% |
Age
| % of all residents | Value |
|---|---|
| <10 | 10.0% |
| 10–19 | 13.3% |
| 20–24 | 2.5% |
| 25–34 | 7.8% |
| 35–44 | 13.0% |
| 45–54 | 12.7% |
| 55–64 | 12.9% |
| 65–74 | 13.6% |
| 75+ | 14.3% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 54.0% |
| Owned outright | 23.5% |
| Rented | 18.7% |
| Vacant | 3.8% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 77.1% |
| Townhome | 7.3% |
| 2–4 units | 2.6% |
| 5–19 units | 3.9% |
| 20+ units | 7.0% |
| Mobile / other | 2.2% |
Businesses in 48118
362 business establishments with 6,505 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 59
- Retail Trade: 52
- Other Services (except Public Administration): 38
- Professional, Scientific, and Technical Services: 35
- Accommodation and Food Services: 34
- Construction: 33
- Manufacturing: 25
- Finance and Insurance: 22
EDDM carrier routes
48118 has 11 USPS carrier routes with 5,998 residential and 414 business mailboxes. Open the EDDM route map.
Carrier routes in 48118
48118 has 11 USPS carrier routes (5 city (C), 6 rural (R)) with 5,998 residential and 414 business mailboxes. Routes range from 388 homes (C009) to 813 homes (C001); the median route has 539 homes. The Census counted 5,733 households in 48118 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 3 |
| 500–749 | 7 |
| 750–999 | 1 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 48118 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C004 — USPS business mailboxes 131, 541 homes
- Route C009 — USPS business mailboxes 108, 388 homes
- Route C005 — USPS business mailboxes 52, 613 homes
- Route C001 — USPS business mailboxes 31, 813 homes
- Route R005 — USPS business mailboxes 28, 577 homes
Select these 5 routes on the route map
Every carrier route in 48118
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 813 | 31 | $69,893 | — | — | — |
| C002 | City | 490 | 14 | $104,987 | — | — | — |
| C004 | City | 541 | 131 | $52,307 | — | — | — |
| C005 | City | 613 | 52 | $52,307 | — | — | — |
| C009 | City | 388 | 108 | $50,000 | — | — | — |
| R001 | Rural | 553 | 13 | $104,108 | — | — | — |
| R002 | Rural | 425 | 14 | $104,108 | — | — | — |
| R003 | Rural | 535 | 9 | $128,443 | — | — | — |
| R004 | Rural | 524 | 8 | $124,938 | — | — | — |
| R005 | Rural | 577 | 28 | $50,000 | — | — | — |
| R006 | Rural | 539 | 6 | $115,643 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 48118 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
- 48130 — Dexter city, MI (7.3 mi)
- 49240 — Grass Lake village, MI (7.9 mi)
- 48103 — Ann Arbor city, MI (10.2 mi)
- 48158 — Manchester village, MI (10.8 mi)
- 48137 (11.2 mi)
- 48169 — Pinckney village, MI (11.3 mi)
- 49259 (12.3 mi)
- 49263 (13.1 mi)
Areas that include 48118
- Chelsea, MI ZIP codes — 1 ZIP code
- Washtenaw County ZIP codes — 22 ZIP codes
- Michigan ZIP code data
Where it ranks
Mail every home in 48118
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) 48118, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 48118 in?
- 48118 is a Chelsea, MI mailing address. By land area, 4% lies inside Chelsea; the rest is outside any Census-defined city or community.
- What county is 48118 in?
- 48118 is in Washtenaw County.
- What is the population of 48118?
- About 13,246 people (±461), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 13,309.
- What is the median household income in 48118?
- $88,278 (±$14,050), 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 48118?
- 11 USPS carrier routes with 5,998 residential and 414 business mailboxes (6,411 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 48118?
- The closest, measured center to center: 48130 (7.3 mi, Dexter), 49240 (7.9 mi, Grass Lake), 48103 (10.2 mi, Ann Arbor), 48158 (10.8 mi, Manchester), 48137 (11.2 mi) and 48169 (11.3 mi, Pinckney).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.