Olla is a town in northwest La Salle Parish, Louisiana, United States, located in the heart of the Louisiana Central Hill Country.
Olla has a federally recognized downtown Historic District and a Louisiana historic marker. The population was 1,617 at the 2010 census. Olla Historic District is the site of the annual Central Louisiana Bluegrass Festival each April and to the Olla Homecoming Parade, Celebration, and Festival that coincides with LaSalle High School Homecoming each autumn.
The Town of Olla also hosts an annual nighttime Christmas Parade, Miss Merry Christmas Pageant, and Community Christmas. These events occur on the Friday locals schools release for Christmas break. The parade begins at the Olla Elementary School and terminates at Santa's Gazebo in the Olla Town Square. The Olla Town Square in located within the Olla Historic District and contains the Olla Farmers Market/Community Pavilion(completed in 2014), Wishing Tree, Dixie Center(Community Center), Gazebo, historic marker, and a stage. The Olla Wishing Tree, which stands between the Community Pavilion and stage, is reported to grant wishes to those who close their eyes and touch its bark. The Olla Town Square facilities can be rented by the public for events.
The "Tri-City Popper" fireworks show, an endeavor funded by donations from the Towns and businesses of Olla, Tullos, and Urania, is held at dusk each 4 July at the Historic Olla Fairgrounds. This event is conducted by the Olla Volunteer Fire Department