Union County
URL: https://knowledge.ivjn.us/en/places/sd-union-county.html

Union County is a county of South Dakota, United States.

## Overview

Union County is a county of [South Dakota](https://knowledge.ivjn.us/en/places/south-dakota.html), United States (FIPS sd127), with a population of about 14,399[^geonames].

## Geography

- Coordinates: 42.8325, -96.6561
- Time zone: America/Chicago

Updated: 2026-10-29

Relations:
- Located in: South Dakota https://knowledge.ivjn.us/en/places/south-dakota.html
- Contains places: Alcester https://knowledge.ivjn.us/en/places/sd-alcester.html
- Contains places: Beresford https://knowledge.ivjn.us/en/places/sd-beresford.html
- Contains places: Dakota Dunes https://knowledge.ivjn.us/en/places/sd-dakota-dunes.html
- Contains places: Elk Point https://knowledge.ivjn.us/en/places/sd-elk-point.html
- Contains places: Jefferson https://knowledge.ivjn.us/en/places/sd-jefferson.html
- Contains places: North Sioux City https://knowledge.ivjn.us/en/places/sd-north-sioux-city.html
- Contains places: Richland https://knowledge.ivjn.us/en/places/sd-richland.html

Mentioned in:
- Alcester https://knowledge.ivjn.us/en/places/sd-alcester.html
- Beresford https://knowledge.ivjn.us/en/places/sd-beresford.html
- Dakota Dunes https://knowledge.ivjn.us/en/places/sd-dakota-dunes.html
- Elk Point https://knowledge.ivjn.us/en/places/sd-elk-point.html
- Jefferson https://knowledge.ivjn.us/en/places/sd-jefferson.html
- North Sioux City https://knowledge.ivjn.us/en/places/sd-north-sioux-city.html
- Richland https://knowledge.ivjn.us/en/places/sd-richland.html

Sources:
- GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip