Prata Camportaccio borders the following municipalities: Chiavenna, Gordona, Mese, Novate Mezzola, Piuro, Samolaco.
San Giacomo Filippo borders the following municipalities: Campodolcino, Chiavenna, Menarola, Mese, Mesocco (Switzerland), Piuro, Soazza (Switzerland).
The Comunità Montana della Valchiavenna, which coincides approximately with the Valchiavenna, includes the thirteen comuni of Campodolcino, Chiavenna, Gordona, Madesimo, Menarola, Mese, Novate Mezzola, Piuro, Prata Camportaccio, Samolaco, San Giacomo Filippo, Verceia and Villa di Chiavenna.