57718 ZIP Code, Black Hawk, SD

57718 is a ZIP code in Black Hawk, South Dakota in Meade County. It covers 27 square miles of land. The closest ZIP codes are 57769, 57701 and 57702. 7,937 people live here in 3,321 households, more than in 9 of every 10 South Dakota ZIP codes. With about 299 people per square mile it is lightly settled, and most homes are owner-occupied (88%). Median household income is $84,162, above the South Dakota median of $75,081.

Quick facts

Key figures

MeasureValue
Residents7,937
Households3,321
Median household income$84,162
Income per person$39,724
Median age42.6
Homeowners88.4%
Median home value$300,100
Median rent$1,167
Bachelor's degree or higher25.9%
Average commute (minutes)21.4
Households with kids under 1832.3%
Moved in the past year10.0%
Below the poverty line4.0%
Broadband internet95.9%
Speak a non-English language at home2.0%

Household income

% of householdsValue
<$10K1.1%
$10–15K0.9%
$15–25K3.6%
$25–35K8.9%
$35–50K8.7%
$50–75K21.7%
$75–100K16.0%
$100–150K24.3%
$150–200K9.9%
$200K+5.0%

Age

% of all residentsValue
<1010.1%
10–199.8%
20–245.1%
25–3416.7%
35–4412.6%
45–5410.8%
55–6414.6%
65–7414.0%
75+6.3%

Tenure

% of housing unitsValue
Owned, with mortgage48.6%
Owned outright39.4%
Rented11.3%
Vacant0.7%

Type of building

% of housing unitsValue
Detached house78.3%
Townhome1.3%
2–4 units1.7%
5–19 units2.6%
20+ units0.2%
Mobile / other16.0%

Businesses in 57718

194 business establishments with 1,645 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

57718 has 4 USPS carrier routes with 2,928 residential and 167 business mailboxes. Open the EDDM route map.

Carrier routes in 57718

57718 has 4 USPS carrier routes (4 rural (R)) with 2,928 residential and 167 business mailboxes. Routes range from 637 homes (R001) to 860 homes (R003); the median route has 716 homes. The Census counted 3,321 households in 57718 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2490
250–4990
500–7492
750–9992
1,000–1,4990
1,500+0

Best routes in 57718 for…

Most businesses

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

  1. Route R001 — USPS business mailboxes 135, 637 homes
  2. Route R003 — USPS business mailboxes 18, 860 homes
  3. Route R002 — USPS business mailboxes 14, 783 homes

Select these 3 routes on the route map

Every carrier route in 57718

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
R001Rural637135$90,961———
R002Rural78314$85,714———
R003Rural86018$90,961———
R004Rural6480$90,961———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 57718 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 57718

Where it ranks

Mail every home in 57718

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) 57718, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 57718 in?
57718 is a Black Hawk, SD mailing address. By land area, 18% lies inside Blackhawk and 7% lies inside Summerset; the rest is outside any Census-defined city or community.
What county is 57718 in?
57718 is in Meade County.
What is the population of 57718?
About 7,937 people (±646), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 7,536.
What is the median household income in 57718?
$84,162 (±$10,655), 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 57718?
4 USPS carrier routes with 2,928 residential and 167 business mailboxes (3,096 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 57718?
The closest, measured center to center: 57769 (6.5 mi, Piedmont), 57701 (9 mi, Rapid City), 57702 (9.8 mi, Rapid City), 57759 (10.1 mi), 57706 (13.3 mi, Box Elder) and 57741 (17.4 mi).

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