In 1915, the first school opened in Los Fresnos, Texas, coinciding with the founding of the community by Lon C. "Mose" Hill and Clyde Tandy. The single-building school operated under the supervision of the Mayor of Los Fresnos.
During the 2015-16 school year, the Los Fresnos Consolidated Independent School District celebrated its 100th anniversary.
Centennial Celebration events were held during the 2015-16 school year. They included:
- Nov. 5, 2015 – Centennial Homecoming Parade: The parade ended at Los Fresnos Memorial Park with a special Centennial bonfire. A community celebration was held in conjunction with the bonfire.
- Jan. 22, 2016: A Look Back at 100 Years – a stage play produced by the LFHS Theatre Arts classes.
- Feb. 2, 2016 – 100th Day of 100th Year Tree Planting: Tree plantings of fresnos (ash) trees were held at every school in Los Fresnos CISD.
- Saturday, April 16, 2016 – Centennial Celebration, Leo Aguilar Memorial Stadium.