57042 ZIP Code, Madison, SD
57042 is a ZIP code in Madison, South Dakota in Lake County. It covers 193 square miles of land. The closest ZIP codes are 57075, 57076 and 57016. 7,756 people live here in 3,331 households, more than in 9 of every 10 South Dakota ZIP codes. It is rural, with fewer than 100 people per square mile, and owners and renters are mixed (67% own). Median household income is $71,868, close to the South Dakota median of $75,081.
Quick facts
- Mailing city: Madison, SD
- County: Lake County
- Land area: 193 sq mi
- Population: 7,756
- Median household income: $71,868
- Carrier routes: 10 (3,804 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 7,756 |
| Households | 3,331 |
| Median household income | $71,868 |
| Income per person | $39,812 |
| Median age | 43.1 |
| Homeowners | 67.4% |
| Median home value | $228,200 |
| Median rent | $963 |
| Bachelor's degree or higher | 36.6% |
| Average commute (minutes) | 12.6 |
| Households with kids under 18 | 22.9% |
| Moved in the past year | 19.4% |
| Below the poverty line | 8.1% |
| Broadband internet | 86.0% |
| Speak a non-English language at home | 3.4% |
Household income
| % of households | Value |
|---|---|
| <$10K | 3.5% |
| $10–15K | 1.4% |
| $15–25K | 13.3% |
| $25–35K | 6.0% |
| $35–50K | 10.5% |
| $50–75K | 17.1% |
| $75–100K | 14.2% |
| $100–150K | 21.9% |
| $150–200K | 6.6% |
| $200K+ | 5.5% |
Age
| % of all residents | Value |
|---|---|
| <10 | 10.7% |
| 10–19 | 13.7% |
| 20–24 | 7.2% |
| 25–34 | 10.6% |
| 35–44 | 11.3% |
| 45–54 | 8.6% |
| 55–64 | 14.2% |
| 65–74 | 15.1% |
| 75+ | 8.6% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 32.9% |
| Owned outright | 26.3% |
| Rented | 28.5% |
| Vacant | 12.3% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 69.9% |
| Townhome | 3.2% |
| 2–4 units | 8.1% |
| 5–19 units | 7.1% |
| 20+ units | 6.0% |
| Mobile / other | 5.8% |
Businesses in 57042
272 business establishments with 3,517 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 35
- Accommodation and Food Services: 28
- Construction: 26
- Other Services (except Public Administration): 26
- Finance and Insurance: 25
- Professional, Scientific, and Technical Services: 24
- Health Care and Social Assistance: 23
- Manufacturing: 22
EDDM carrier routes
57042 has 10 USPS carrier routes with 3,804 residential and 231 business mailboxes. Open the EDDM route map.
Carrier routes in 57042
57042 has 10 USPS carrier routes (5 city (C), 5 rural (R)) with 3,804 residential and 231 business mailboxes. Routes range from 100 homes (R005) to 568 homes (R003); the median route has 425 homes. The Census counted 3,331 households in 57042 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 3 |
| 250–499 | 5 |
| 500–749 | 2 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 57042 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C002 — USPS business mailboxes 82, 408 homes
- Route R003 — USPS business mailboxes 44, 568 homes
- Route C004 — USPS business mailboxes 32, 456 homes
- Route R002 — USPS business mailboxes 23, 443 homes
- Route R001 — USPS business mailboxes 15, 241 homes
Select these 5 routes on the route map
Every carrier route in 57042
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 391 | 8 | $55,211 | — | — | — |
| C002 | City | 408 | 82 | $55,211 | — | — | — |
| C003 | City | 442 | 7 | $54,213 | — | — | — |
| C004 | City | 456 | 32 | $54,213 | — | — | — |
| C005 | City | 247 | 12 | $54,213 | — | — | — |
| R001 | Rural | 241 | 15 | $100,000 | — | — | — |
| R002 | Rural | 443 | 23 | $94,145 | — | — | — |
| R003 | Rural | 568 | 44 | $94,145 | — | — | — |
| R004 | Rural | 508 | 4 | $92,586 | — | — | — |
| R005 | Rural | 100 | 4 | $94,145 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 57042 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
- 57075 — Lake Madison CDP, SD (9 mi)
- 57076 — Winfred CDP, SD (10.7 mi)
- 57016 — Chester CDP, SD (11.3 mi)
- 57054 — Ramona town, SD (11.6 mi)
- 57057 (12.9 mi)
- 57050 — Nunda town, SD (14.2 mi)
- 57018 — Colton city, SD (14.5 mi)
- 57048 — Orland Colony CDP, SD (16.1 mi)
Areas that include 57042
- Madison, SD ZIP codes — 1 ZIP code
- Lake Madison, SD ZIP codes — 2 ZIP codes
- Rustic Acres Colony, SD ZIP codes — 1 ZIP code
- Lake County ZIP codes — 7 ZIP codes
- South Dakota ZIP code data
Mail every home in 57042
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) 57042, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 57042 in?
- 57042 is a Madison, SD mailing address. By land area, 2% lies inside Madison; the rest is outside any Census-defined city or community.
- What county is 57042 in?
- 57042 is in Lake County.
- What is the population of 57042?
- About 7,756 people (±205), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 8,131.
- What is the median household income in 57042?
- $71,868 (±$8,353), compared with $75,081 for South Dakota as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 57042?
- 10 USPS carrier routes with 3,804 residential and 231 business mailboxes (4,032 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 57042?
- The closest, measured center to center: 57075 (9 mi, Lake Madison), 57076 (10.7 mi, Winfred), 57016 (11.3 mi, Chester), 57054 (11.6 mi, Ramona), 57057 (12.9 mi) and 57050 (14.2 mi, Nunda).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.