Clayton URL: https://knowledge.ivjn.us/en/places/mo-clayton.html Clayton is a city in Missouri, United States. ## Overview Clayton is a city in [Missouri](https://knowledge.ivjn.us/en/places/missouri.html), United States, with a population of about 15,884[^geonames]. ## Geography - Coordinates: 38.6425, -90.3237 Updated: 2026-10-29 Relations: - Located in: St. Louis County https://knowledge.ivjn.us/en/places/mo-st-louis-county.html Sources: - GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip