Tarlac, officially the Province of Tarlac, is a landlocked province in the Philippines located in the Central Luzon region. Its capital is the city of Tarlac. It is bounded on the north by the province of Pangasinan, Nueva Ecija on the east, Zambales on the west and Pampanga in the south. The province comprises three congressional districts and is subdivided into 17 municipalities and one city, Tarlac City, which is the provincial capital.

Nueva Ecija, officially the Province of Nueva Ecija, is a landlocked province in the Philippines located in the Central Luzon region. Its capital is the city of Palayan, while Cabanatuan, its former capital, is the largest local government unit (LGU). Nueva Ecija borders, from the south clockwise, Bulacan, Pampanga, Tarlac, Pangasinan, Nueva Vizcaya and Aurora. The province is nationally known as the Rice Granary of the Philippines, producing the largest rice yield in the country.