The following is a list of the 74 municipalities ( comuni ) of the Province of Biella in the region of Piedmont in Italy.
| Municipality | Population (2025) [1] | Area (km²) [2] | Density |
|---|---|---|---|
| Ailoche | 291 | 10.78 | 27.0 |
| Andorno Micca | 3,041 | 11.89 | 255.8 |
| Benna | 1,163 | 9.39 | 123.9 |
| Biella | 43,181 | 46.69 | 924.8 |
| Bioglio | 902 | 18.85 | 47.9 |
| Borriana | 859 | 5.35 | 160.6 |
| Brusnengo | 1,871 | 10.45 | 179.0 |
| Callabiana | 148 | 6.56 | 22.6 |
| Camandona | 317 | 9.20 | 34.5 |
| Camburzano | 1,119 | 3.80 | 294.5 |
| Campiglia Cervo | 499 | 28.20 | 17.7 |
| Candelo | 7,218 | 15.12 | 477.4 |
| Caprile | 187 | 11.60 | 16.1 |
| Casapinta | 367 | 2.86 | 128.3 |
| Castelletto Cervo | 769 | 14.90 | 51.6 |
| Cavaglià | 3,491 | 25.63 | 136.2 |
| Cerrione | 2,744 | 27.99 | 98.0 |
| Coggiola | 1,653 | 23.78 | 69.5 |
| Cossato | 13,868 | 27.73 | 500.1 |
| Crevacuore | 1,377 | 8.60 | 160.1 |
| Curino | 462 | 21.65 | 21.3 |
| Donato | 688 | 12.07 | 57.0 |
| Dorzano | 535 | 4.74 | 112.9 |
| Gaglianico | 3,800 | 4.50 | 844.4 |
| Gifflenga | 104 | 2.26 | 46.0 |
| Graglia | 1,441 | 20.14 | 71.5 |
| Lessona | 2,624 | 12.78 | 205.3 |
| Magnano | 339 | 10.56 | 32.1 |
| Massazza | 565 | 11.61 | 48.7 |
| Masserano | 1,877 | 27.07 | 69.3 |
| Mezzana Mortigliengo | 483 | 4.31 | 112.1 |
| Miagliano | 541 | 0.67 | 807.5 |
| Mongrando | 3,572 | 16.50 | 216.5 |
| Mottalciata | 1,284 | 18.39 | 69.8 |
| Muzzano | 572 | 6.10 | 93.8 |
| Netro | 908 | 12.57 | 72.2 |
| Occhieppo Inferiore | 3,761 | 4.06 | 926.4 |
| Occhieppo Superiore | 2,568 | 5.15 | 498.6 |
| Pettinengo | 1,432 | 15.30 | 93.6 |
| Piatto | 466 | 3.59 | 129.8 |
| Piedicavallo | 168 | 17.75 | 9.5 |
| Pollone | 1,958 | 16.22 | 120.7 |
| Ponderano | 3,629 | 7.05 | 514.8 |
| Portula | 1,094 | 11.31 | 96.7 |
| Pralungo | 2,265 | 7.25 | 312.4 |
| Pray | 1,996 | 9.18 | 217.4 |
| Quaregna Cerreto | 2,023 | 8.41 | 240.5 |
| Ronco Biellese | 1,412 | 3.85 | 366.8 |
| Roppolo | 809 | 8.65 | 93.5 |
| Rosazza | 96 | 9.02 | 10.6 |
| Sagliano Micca | 1,541 | 14.61 | 105.5 |
| Sala Biellese | 522 | 8.03 | 65.0 |
| Salussola | 1,813 | 38.52 | 47.1 |
| Sandigliano | 2,601 | 10.22 | 254.5 |
| Sordevolo | 1,251 | 13.74 | 91.0 |
| Sostegno | 729 | 18.07 | 40.3 |
| Strona | 929 | 3.72 | 249.7 |
| Tavigliano | 896 | 11.24 | 79.7 |
| Ternengo | 265 | 1.98 | 133.8 |
| Tollegno | 2,354 | 3.31 | 711.2 |
| Torrazzo | 189 | 5.77 | 32.8 |
| Valdengo | 2,369 | 7.68 | 308.5 |
| Valdilana | 9,911 | 61.13 | 162.1 |
| Vallanzengo | 196 | 4.67 | 42.0 |
| Valle San Nicolao | 834 | 13.26 | 62.9 |
| Veglio | 433 | 6.41 | 67.6 |
| Verrone | 1,155 | 8.59 | 134.5 |
| Vigliano Biellese | 7,526 | 8.40 | 896.0 |
| Villa del Bosco | 310 | 3.70 | 83.8 |
| Villanova Biellese | 174 | 7.87 | 22.1 |
| Viverone | 1,329 | 12.26 | 108.4 |
| Zimone | 378 | 2.95 | 128.1 |
| Zubiena | 1,125 | 12.47 | 90.2 |
| Zumaglia | 961 | 2.61 | 368.2 |
