[4] Youngsville was the birthplace of Louisiana businessman and politician Dudley J. LeBlanc, the entrepreneur of the Hadacol fortune of the 1950s.

Prior to 1839, George Roy and his son, Desire, laid out the area and named the community "Royville".

[9] In 2007, Mayor Wilson Viator and the Youngsville City Council named Joey Langlinais as the Chairman of the Centennial Committee.

[12] It is bordered to the north by Lafayette, the parish seat, and to the east by the city of Broussard.

2020 United States census, there were 15,929 people, 4,396 households, and 3,883 families residing in the city.

The first segment, from the intersection of Highway 92 and Chemin Metairie, to central Youngsville, opened in early 2009.

Chemin Metairie Parkway joins Highway 90 near the Baker Hughes Complex in Broussard.

A section of the parkway passes through the Sugar Mill Pond development and a new shopping complex anchored by Lafayette Parish's first Rouse's Grocery Store.