There are 102 municipalities in Cantabria generally comprising several townships, and from these, several districts. A number of municipalities bear the name of one of their townships (be it its capital or not), but not all them do. Each municipality is governed by its own city or municipal council, and two of them, Tresviso and Pesquera, do it by concejo abierto (open council), having fewer than 250 inhabitants.

The Mancomunidad Campoo-Cabuérniga is not a municipality, but a communal property, singular for its size and characteristics, of shared management between the municipalities of Hermandad de Campoo de Suso, Cabuérniga, Los Tojos and Ruente. This mountain estate is used as a grazing ground for Tudanca cattle and for horses in less amount, in its brañas or grass prairies, and even nowadays transhumant cattle farming traditions survive in this region.