Louisiana Highway 100 (LA 100) is a state highway located in Acadia Parish, Louisiana. It runs 14.84 miles (23.88 km) in an east–west direction from LA 97 in Evangeline to LA 13 in Crowley. The western section of the route connects the rural community of Evangeline with LA 91 at a point south of Iota. LA 91 and LA 100 then engage in a concurrency through the community of Egan, located near Interstate 10 (I-10) between Jennings and Crowley. East of Egan, LA 100 parallels the interstate to the northwest corner of Crowley, the parish seat. Here, the highway serves as an access road to the various services located around Exit 80 on I-10. Though LA 100 has an overall east–west route, its signage does not carry directional banners.