The following is a list of the 33 municipalities ( comuni ) of the Province of Terni in the region of Umbria in Italy.
| Municipality | Population (2025) [1] | Area (km²) [2] | Density |
|---|---|---|---|
| Acquasparta | 4,351 | 81.61 | 53.3 |
| Allerona | 1,687 | 82.61 | 20.4 |
| Alviano | 1,330 | 23.90 | 55.6 |
| Amelia | 11,474 | 132.50 | 86.6 |
| Arrone | 2,493 | 41.04 | 60.7 |
| Attigliano | 1,946 | 10.51 | 185.2 |
| Avigliano Umbro | 2,317 | 51.34 | 45.1 |
| Baschi | 2,542 | 68.57 | 37.1 |
| Calvi dell'Umbria | 1,676 | 45.79 | 36.6 |
| Castel Giorgio | 2,002 | 42.14 | 47.5 |
| Castel Viscardo | 2,649 | 26.22 | 101.0 |
| Fabro | 2,579 | 34.55 | 74.6 |
| Ferentillo | 1,788 | 69.59 | 25.7 |
| Ficulle | 1,562 | 64.62 | 24.2 |
| Giove | 1,842 | 15.09 | 122.1 |
| Guardea | 1,735 | 39.38 | 44.1 |
| Lugnano in Teverina | 1,396 | 29.83 | 46.8 |
| Montecastrilli | 4,795 | 62.43 | 76.8 |
| Montecchio | 1,475 | 49.22 | 30.0 |
| Montefranco | 1,255 | 10.09 | 124.4 |
| Montegabbione | 1,098 | 51.06 | 21.5 |
| Monteleone d'Orvieto | 1,357 | 24.10 | 56.3 |
| Narni | 17,769 | 197.99 | 89.7 |
| Orvieto | 19,196 | 281.27 | 68.2 |
| Otricoli | 1,697 | 27.53 | 61.6 |
| Parrano | 490 | 40.09 | 12.2 |
| Penna in Teverina | 1,022 | 10.00 | 102.2 |
| Polino | 220 | 19.57 | 11.2 |
| Porano | 1,840 | 13.60 | 135.3 |
| San Gemini | 4,628 | 27.90 | 165.9 |
| San Venanzo | 2,151 | 169.45 | 12.7 |
| Stroncone | 4,613 | 71.17 | 64.8 |
| Terni | 106,310 | 212.43 | 500.4 |
