The main Embassies in Costa Rica are in the San José area:

US Embassy – 104, San José, Costa Rica
+506 2519 2000

Canadian Embassy – The Canadian Embassy is located in Sabana Sur:
Behind the “Contraloría” in the
Oficentro Ejecutivo La Sabana
Building 5, Third floor
+506 2242 4400

British Embassy – Paseo Colón, San José, Costa Rica
+506 2258 2025