When to seek medical advice. Foot swelling or leg swelling. Find possible causes of foot swelling or leg swelling based on specific factors. Check one or more factors on this page that apply to your symptom. Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Sponsored Topics. Union is a city in and the county seat of Franklin County, Missouri, United States. The population was 7,757 at the 2000 census. It is located on the Bourbeuse River. The city was founded in 1827 and is named after the ideal of political unity.
The community of Union is located in Eau Claire County. The 2010 Census gave Eau Claire County a population of 98,736 people. This means that Union had 2.7% of the county's total population, making it Eau Claire's 6th most populous community.