Youngsville is a city in Lafayette Parish, Louisiana, United States, and is part of the Lafayette Metropolitan Statistical Area. The population was 8,105 as of the 2010 census and an estimated 14,077 in 2018.
Youngsville was the birthplace of the colorful Louisiana businessman and politician Dudley J. LeBlanc, the entrepreneur of the Hadacol fortune of the 1950s.
Bernard LeBas of Ville Platte has represented Evangeline and St. Landry parishes in the Louisiana House of Representatives since 2008. He is a former resident of Youngsville.
Youngsville is located in southeastern Lafayette Parish at 30°6′2″N 91°59′27″W (30.100595, -91.990707). It is bordered to the north by Lafayette, the parish seat, and to the east by the city of Broussard.
The center of Lafayette is 10 miles (16 km) to the north, Abbeville is 16 miles (26 km) to the southwest, and New Iberia is 16 miles to the southeast.
According to the United States Census Bureau, Youngsville has a total land area of 12.07 square miles (31.26 km2), all of it recorded as land.
Youngsville today still reflects its history in its people, culture, traditions, and architecture. It was settled in the early 19th century by French Acadian farmers. Prior to 1839, George Roy and his son, Desire, laid out the area and named the community "Royville".