ZIP Code Tabulation Area · South Dakota

ZIP Code 57042: Lake County, SD

ZIP Code 57042 (Lake County, South Dakota) has an estimated 7,756 residents in 3,331 households. The median household income is $71,868, the median home value is $228,200 and the median gross rent is $963/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

7,756

Margin of error ±205

Median household income

$71,868

Margin of error ±$8,353

Median home value

$228,200

Margin of error ±$26,047

Median gross rent

$963/mo

Margin of error ±$102

Median age

43.1 yrs

Margin of error ±2.5 yrs

Mean travel time to work

12.6 min

Margin of error ±2.2 min

How ZIP 57042 compares with South Dakota and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 5704243.1 yrsSouth Dakota38.0 yrsUnited States38.9 yrs

Median household income

ZIP 57042$71,868South Dakota$75,081United States$80,734

Per capita income

ZIP 57042$39,812South Dakota$40,550United States$44,673

Poverty rate

ZIP 570428.1%South Dakota11.9%United States12.5%

Unemployment rate

ZIP 570423.9%South Dakota2.9%United States5.2%

Bachelor's degree or higher

ZIP 5704236.6%South Dakota31.9%United States35.7%

Median home value

ZIP 57042$228,200South Dakota$257,400United States$332,700

Median gross rent

ZIP 57042$963/moSouth Dakota$946/moUnited States$1,413/mo

Owner-occupied homes

ZIP 5704267.4%South Dakota68.6%United States65.2%

Mean travel time to work

ZIP 5704212.6 minSouth Dakota17.8 minUnited States26.4 min

Worked from home

ZIP 570429.5%South Dakota9.7%United States15.1%

All figures for ZIP 57042

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 57042 — ACS 2020–2024 5-year estimates
Measure	ZIP 57042	Margin of error	South Dakota	United States
Total population	7,756	±205	907,428	334,922,499
Median age	43.1 yrs	±2.5 yrs	38.0 yrs	38.9 yrs
Households	3,331	±158	365,544	129,227,496
Median household income	$71,868	±$8,353	$75,081	$80,734
Per capita income	$39,812	±$4,223	$40,550	$44,673
Poverty rate	8.1%	±2.8 pts	11.9%	12.5%
Unemployment rate	3.9%	±1.7 pts	2.9%	5.2%
Bachelor's degree or higher	36.6%	±5.5 pts	31.9%	35.7%
Median home value	$228,200	±$26,047	$257,400	$332,700
Median gross rent	$963/mo	±$102	$946/mo	$1,413/mo
Owner-occupied homes	67.4%	±5.0 pts	68.6%	65.2%
Mean travel time to work	12.6 min	±2.2 min	17.8 min	26.4 min
Worked from home	9.5%	±3.2 pts	9.7%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 57042
Group	ZIP 57042	South Dakota	United States
White alone, not Hispanic or Latino	92.5%	79.8%	57.4%
Black or African American alone, not Hispanic or Latino	1.0%	2.1%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.7%	7.1%	0.5%
Asian alone, not Hispanic or Latino	1.0%	1.4%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.2%	0.0%	0.2%
Some other race alone, not Hispanic or Latino	0.0%	0.3%	0.6%
Two or more races, not Hispanic or Latino	1.1%	4.4%	4.3%
Hispanic or Latino (of any race)	3.4%	4.8%	19.3%

Where ZIP 57042 is

State: South Dakota
Main county: Lake County— also overlaps McCook County
Largest overlapping place: Madison (2% of the ZIP's land area)
Land area: 193.22 sq mi· about 40 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Lake County

57016 Lake County, SD 57050 Lake County, SD 57054 Lake County, SD 57057 Lake County, SD 57075 Lake County, SD 57076 Lake County, SD

See every ZIP code in South Dakota, or compare ZIP 57042 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.