Clay County
URL: https://knowledge.ivjn.us/en/places/sd-clay-county.html

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

## Overview

Clay County is a county of [South Dakota](https://knowledge.ivjn.us/en/places/south-dakota.html), United States (FIPS sd027), with a population of about 13,864[^geonames].

## Geography

- Coordinates: 42.9147, -96.9757
- Time zone: America/Chicago

Updated: 2026-10-29

Relations:
- Located in: South Dakota https://knowledge.ivjn.us/en/places/south-dakota.html
- Contains places: Vermillion https://knowledge.ivjn.us/en/places/sd-vermillion.html
- Contains places: Wakonda https://knowledge.ivjn.us/en/places/sd-wakonda.html

Mentioned in:
- Vermillion https://knowledge.ivjn.us/en/places/sd-vermillion.html
- Wakonda https://knowledge.ivjn.us/en/places/sd-wakonda.html

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