West Union, SC has a population of 305 and is the 22,415th largest city in the United States. The population density is 385 per sq mi which is 161% higher than the South Carolina average and 325% higher than the national average. The median age in West Union is 34 which is approximately 14% lower than the South Carolina average of 39. In West Union, 48% of the population over 15 years of age are married, 72% speak English and 26% speak Spanish. 50% of West Union residents were born in South Carolina, 30% were born out of state, 1% were born outside of the United States and 19% were foreign born.