What city is 57028 in?

57028 is a Flandreau, SD mailing address. None of its land lies inside a Census-defined city or community.

What is the population of 57028?

About 3,450 people (±236), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 3,348.

What is the median household income in 57028?

$72,798 (±$8,345), 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 57028?

5 USPS carrier routes with 1,426 residential and 118 business mailboxes (1,544 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 57028?

The closest, measured center to center: 57024 (6.7 mi, Egan), 57017 (11.1 mi, Colman), 57065 (11.1 mi, Trent), 56164 (13.3 mi, Pipestone), 57026 (13.8 mi, Elkton) and 56140 (15.6 mi, Ihlen).

57028 ZIP Code, Flandreau, SD

57028 is a ZIP code in Flandreau, South Dakota in Moody County. It covers 201 square miles of land. The closest ZIP codes are 57024, 57017 and 57065. 3,450 people live here in 1,441 households. It is rural, with fewer than 100 people per square mile, and owners and renters are mixed (65% own). Median household income is $72,798, close to the South Dakota median of $75,081.

Quick facts

Mailing city: Flandreau, SD
County: Moody County
Land area: 201 sq mi
Population: 3,450
Median household income: $72,798
Carrier routes: 5 (1,426 homes)

Key figures

Measure	Value
Residents	3,450
Households	1,441
Median household income	$72,798
Income per person	$32,789
Median age	40
Homeowners	65.1%
Median home value	$193,800
Median rent	$681
Bachelor's degree or higher	32.0%
Average commute (minutes)	15.6
Households with kids under 18	29.8%
Moved in the past year	8.4%
Below the poverty line	15.7%
Broadband internet	87.9%
Speak a non-English language at home	7.9%

Household income

% of households	Value
<$10K	7.1%
$10–15K	4.2%
$15–25K	8.0%
$25–35K	8.7%
$35–50K	13.1%
$50–75K	15.2%
$75–100K	13.7%
$100–150K	15.5%
$150–200K	9.6%
$200K+	4.7%

Age

% of all residents	Value
<10	13.7%
10–19	14.6%
20–24	5.9%
25–34	11.0%
35–44	11.6%
45–54	9.3%
55–64	11.8%
65–74	14.1%
75+	8.1%

Tenure

% of housing units	Value
Owned, with mortgage	30.0%
Owned outright	29.5%
Rented	31.9%
Vacant	8.5%

Type of building

% of housing units	Value
Detached house	76.6%
Townhome	1.7%
2–4 units	10.3%
5–19 units	8.7%
20+ units	1.3%
Mobile / other	1.4%

Businesses in 57028

93 business establishments with 918 employees (ZIP Codes Business Patterns 2023).

Other Services (except Public Administration): 15
Health Care and Social Assistance: 14
Construction: 11
Retail Trade: 9
Professional, Scientific, and Technical Services: 8
Accommodation and Food Services: 8
Finance and Insurance: 5
Agriculture, Forestry, Fishing and Hunting: 4

EDDM carrier routes

57028 has 5 USPS carrier routes with 1,426 residential and 118 business mailboxes. Open the EDDM route map.

Carrier routes in 57028

57028 has 5 USPS carrier routes (2 city (C), 3 rural (R)) with 1,426 residential and 118 business mailboxes. Routes range from 99 homes (R002) to 611 homes (C002); the median route has 259 homes. The Census counted 1,441 households in 57028 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	2
250–499	2
500–749	1
750–999	0
1,000–1,499	0
1,500+	0

Best routes in 57028 for…

Most businesses

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

Route C002 — USPS business mailboxes 78, 611 homes
Route R001 — USPS business mailboxes 15, 259 homes
Route C001 — USPS business mailboxes 12, 294 homes
Route R003 — USPS business mailboxes 10, 163 homes
Route R002 — USPS business mailboxes 3, 99 homes

Select these 5 routes on the route map

Every carrier route in 57028

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	294	12	$59,589	—	—	—
C002	City	611	78	$56,532	—	—	—
R001	Rural	259	15	$63,256	—	—	—
R002	Rural	99	3	$85,646	—	—	—
R003	Rural	163	10	$104,995	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 57028 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

57024 — Egan city, SD (6.7 mi)
57017 — Colman city, SD (11.1 mi)
57065 — Trent town, SD (11.1 mi)
56164 — Pipestone city, MN (13.3 mi)
57026 — Elkton city, SD (13.8 mi)
56140 — Ihlen city, MN (15.6 mi)
57022 — Dell Rapids city, SD (15.7 mi)
57002 — Aurora town, SD (16.1 mi)

Areas that include 57028

Flandreau, SD ZIP codes — 1 ZIP code
Pleasant Valley Colony, SD ZIP codes — 1 ZIP code
Moody County ZIP codes — 9 ZIP codes
South Dakota ZIP code data

Where it ranks

Mail every home in 57028

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) 57028, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 57028 in?: 57028 is a Flandreau, SD mailing address. None of its land lies inside a Census-defined city or community.
What county is 57028 in?: 57028 is in Moody County.
What is the population of 57028?: About 3,450 people (±236), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 3,348.
What is the median household income in 57028?: $72,798 (±$8,345), 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 57028?: 5 USPS carrier routes with 1,426 residential and 118 business mailboxes (1,544 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 57028?: The closest, measured center to center: 57024 (6.7 mi, Egan), 57017 (11.1 mi, Colman), 57065 (11.1 mi, Trent), 56164 (13.3 mi, Pipestone), 57026 (13.8 mi, Elkton) and 56140 (15.6 mi, Ihlen).

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