Borgo Ticino borders the following municipalities: Agrate Conturbia, Castelletto sopra Ticino, Comignago, Divignano, Varallo Pombia, and Veruno.
Mezzomerico borders the following municipalities: Agrate Conturbia, Divignano, Marano Ticino, Oleggio, Suno, and Vaprio d'Agogna.