Union County, SD Demographics & ZIP Codes

Union County, South Dakota demographics and median household income by ZIP code — 4 ZIP codes — population 14,242 — avg. income $85,371 — avg. home value $267,950. Compare income, housing, and ZIP-level data on US5.

ZIP codes

Population

14,242

Median household income (avg.)

$85,371

114% of U.S. median

Average home value

$267,950

77% of U.S. median

Average rent

$732

63% of U.S. median

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Union County demographics

Union County, South Dakota covers 4 ZIP codes, with a combined ZIP-area population of about 14,242.

Median household income in Union County

The average median household income across ZIP codes in Union County, South Dakota is about $85,371 — about 18% above the SD ZIP average ($72,498), and about 14% above the U.S. median ($75,149).

Among ZIPs with income data, 57049 (North Sioux City) is near the top at about $93,239, while 57001 (Alcester) is near the bottom at about $72,885.

Housing in Union County

For housing in Union County, South Dakota, the average median home value is about $267,950 and the average median rent is about $732.

The most populous ZIP is 57049 (North Sioux City) with about 7,814 residents. Use the table below to compare ZIP codes across the county.

ZIP codes in Union County

Sort by population, income, or home value. Click a column header to toggle ascending / descending.

ZIP	City	County	State	Population ↓	Income	Home value
57049	North Sioux City	Union County	SD	7,814	$93,239	$406,300
57025	Richland	Union County	SD	3,165	$88,466	$226,000
57038	Jefferson	Union County	SD	1,713	$86,895	$280,900
57001	Alcester	Union County	SD	1,550	$72,885	$158,600

Frequently asked questions

What are the demographics of Union County?

Union County, South Dakota has a combined ZIP-area population of about 14,242 across 4 ZIP codes. Browse the ZIP table for population, income, and housing by code.

What is the median household income in Union County?

The average median household income across ZIP codes in Union County, South Dakota is about $85,371, about 18% above the state ZIP average ($72,498), and about 14% above the U.S. median ($75,149). Average median home value is about $267,950. Among ZIPs with data, 57049 (North Sioux City) is near the top ($93,239) and 57001 (Alcester) is near the bottom ($72,885).

How many ZIP codes are in Union County?

Union County, South Dakota includes 4 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.

Where can I find ZIP code demographics for Union County?

This page lists ZIP codes in Union County, South Dakota with population, median household income, and home value. Select a ZIP for a full demographics profile.