There are 33 municipalities within the province of Terni in Umbria. Acquasparta is the largest city by population with a total of 4.497 inhabitants.
| Name | Population | Density | Altitude |
|---|---|---|---|
| Acquasparta | 4.497 | 55pp/km² | 320m |
| Allerona | 1.701 | 21pp/km² | 472m |
| Alviano | 1.414 | 59pp/km² | 251m |
| Amelia | 11.464 | 87pp/km² | 370m |
| Arrone | 2.613 | 64pp/km² | 243m |
| Attigliano | 1.984 | 189pp/km² | 95m |
| Avigliano umbro | 2.413 | 47pp/km² | 441m |
| Baschi | 2.662 | 39pp/km² | 165m |
| Calvi dell'umbria | 1.707 | 37pp/km² | 401m |
| Castel giorgio | 2.076 | 49pp/km² | 559m |
| Castel viscardo | 2.757 | 105pp/km² | 507m |
| Fabro | 2.652 | 77pp/km² | 364m |
| Ferentillo | 1.821 | 26pp/km² | 260m |
| Ficulle | 1.587 | 25pp/km² | 437m |
| Giove | 1.877 | 124pp/km² | 292m |
| Guardea | 1.773 | 45pp/km² | 387m |
| Lugnano in teverina | 1.432 | 48pp/km² | 419m |
| Montecastrilli | 4.815 | 77pp/km² | 391m |
| Montecchio | 1.597 | 32pp/km² | 377m |
| Montefranco | 1.275 | 126pp/km² | 375m |
| Montegabbione | 1.140 | 22pp/km² | 594m |
| Monteleone d'orvieto | 1.386 | 58pp/km² | 500m |
| Narni | 18.523 | 94pp/km² | 240m |
| Orvieto | 20.121 | 72pp/km² | 325m |
| Otricoli | 1.746 | 64pp/km² | 209m |
| Parrano | 494 | 12pp/km² | 441m |
| Penna in teverina | 1.049 | 105pp/km² | 302m |
| Polino | 215 | 11pp/km² | 836m |
| Porano | 1.917 | 141pp/km² | 444m |
| San gemini | 4.850 | 174pp/km² | 337m |
| San venanzo | 2.192 | 13pp/km² | 465m |
| Stroncone | 4.697 | 66pp/km² | 450m |
| Terni | 109.255 | 514pp/km² | 130m |
