Liga Deportiva Alajuelense, commonly known as Alajuelense and nicknamed La Liga, is a Costa Rican multisport club based in the borough of El Llano, Alajuela, Alajuela province. Although they compete in a number of different sports, Alajuelense is mostly known for its association football team. It plays in the Primera División de Costa Rica, the top tier of the Costa Rican football league system. Alajuelense is one of two clubs to have never been relegated, along with Herediano.

Alajuela is a district in the Alajuela canton of the Alajuela Province of Costa Rica. As the seat of the Municipality of Alajuela canton, it is awarded the status of city. By virtue of being the city of the first canton of the province, it is also the capital of the Province of Alajuela.