 
  
 The following is a list of the municipalities ( comuni ) of Lazio, Italy.
There are 378 municipalities in Lazio as of 2025:
| Municipality | Province | Population (2025) [1] | Area (km2) [2] | Density | 
|---|---|---|---|---|
| Accumoli | Rieti | 501 | 87.37 | 5.7 | 
| Acquafondata | Frosinone | 249 | 25.32 | 9.8 | 
| Acquapendente | Viterbo | 5,227 | 131.61 | 39.7 | 
| Acuto | Frosinone | 1,817 | 13.47 | 134.9 | 
| Affile | Roma | 1,398 | 15.11 | 92.5 | 
| Agosta | Roma | 1,669 | 9.50 | 175.7 | 
| Alatri | Frosinone | 27,531 | 96.96 | 283.9 | 
| Albano Laziale | Roma | 39,634 | 23.80 | 1,665.3 | 
| Allumiere | Roma | 3,788 | 92.17 | 41.1 | 
| Alvito | Frosinone | 2,461 | 51.72 | 47.6 | 
| Amaseno | Frosinone | 4,079 | 77.73 | 52.5 | 
| Amatrice | Rieti | 2,173 | 174.40 | 12.5 | 
| Anagni | Frosinone | 20,603 | 112.82 | 182.6 | 
| Anguillara Sabazia | Roma | 19,070 | 75.24 | 253.5 | 
| Anticoli Corrado | Roma | 855 | 16.22 | 52.7 | 
| Antrodoco | Rieti | 2,263 | 63.90 | 35.4 | 
| Anzio | Roma | 59,793 | 43.65 | 1,369.8 | 
| Aprilia | Latina | 74,615 | 178.11 | 418.9 | 
| Aquino | Frosinone | 4,919 | 19.24 | 255.7 | 
| Arce | Frosinone | 5,389 | 39.52 | 136.4 | 
| Arcinazzo Romano | Roma | 1,229 | 28.31 | 43.4 | 
| Ardea | Roma | 50,781 | 72.09 | 704.4 | 
| Ariccia | Roma | 17,936 | 18.59 | 964.8 | 
| Arlena di Castro | Viterbo | 797 | 21.87 | 36.4 | 
| Arnara | Frosinone | 2,158 | 12.29 | 175.6 | 
| Arpino | Frosinone | 6,561 | 56.24 | 116.7 | 
| Arsoli | Roma | 1,334 | 12.20 | 109.3 | 
| Artena | Roma | 13,655 | 54.80 | 249.2 | 
| Ascrea | Rieti | 204 | 13.98 | 14.6 | 
| Atina | Frosinone | 4,076 | 29.89 | 136.4 | 
| Ausonia | Frosinone | 2,417 | 19.64 | 123.1 | 
| Bagnoregio | Viterbo | 3,295 | 72.81 | 45.3 | 
| Barbarano Romano | Viterbo | 981 | 37.56 | 26.1 | 
| Bassano in Teverina | Viterbo | 1,275 | 12.17 | 104.8 | 
| Bassano Romano | Viterbo | 4,615 | 37.55 | 122.9 | 
| Bassiano | Latina | 1,421 | 32.40 | 43.9 | 
| Bellegra | Roma | 2,611 | 18.78 | 139.0 | 
| Belmonte Castello | Frosinone | 655 | 14.05 | 46.6 | 
| Belmonte in Sabina | Rieti | 630 | 23.65 | 26.6 | 
| Blera | Viterbo | 2,907 | 92.92 | 31.3 | 
| Bolsena | Viterbo | 3,682 | 63.57 | 57.9 | 
| Bomarzo | Viterbo | 1,677 | 39.65 | 42.3 | 
| Borbona | Rieti | 577 | 47.96 | 12.0 | 
| Borgo Velino | Rieti | 904 | 18.29 | 49.4 | 
| Borgorose | Rieti | 4,226 | 145.82 | 29.0 | 
| Boville Ernica | Frosinone | 8,253 | 28.19 | 292.8 | 
| Bracciano | Roma | 18,454 | 143.06 | 129.0 | 
| Broccostella | Frosinone | 2,614 | 11.79 | 221.7 | 
| Calcata | Viterbo | 901 | 7.63 | 118.1 | 
| Camerata Nuova | Roma | 403 | 40.50 | 10.0 | 
| Campagnano di Roma | Roma | 10,946 | 46.94 | 233.2 | 
| Campodimele | Latina | 555 | 38.38 | 14.5 | 
| Campoli Appennino | Frosinone | 1,592 | 32.43 | 49.1 | 
| Canale Monterano | Roma | 4,165 | 36.92 | 112.8 | 
| Canepina | Viterbo | 2,910 | 20.85 | 139.6 | 
| Canino | Viterbo | 5,029 | 124.04 | 40.5 | 
| Cantalice | Rieti | 2,415 | 37.62 | 64.2 | 
| Cantalupo in Sabina | Rieti | 1,657 | 10.62 | 156.0 | 
| Canterano | Roma | 352 | 7.37 | 47.8 | 
| Capena | Roma | 10,971 | 29.51 | 371.8 | 
| Capodimonte | Viterbo | 1,650 | 61.29 | 26.9 | 
| Capranica | Viterbo | 6,361 | 40.97 | 155.3 | 
| Capranica Prenestina | Roma | 324 | 20.36 | 15.9 | 
| Caprarola | Viterbo | 5,166 | 57.58 | 89.7 | 
| Carbognano | Viterbo | 1,968 | 17.41 | 113.0 | 
| Carpineto Romano | Roma | 3,945 | 86.29 | 45.7 | 
| Casalattico | Frosinone | 512 | 28.38 | 18.0 | 
| Casalvieri | Frosinone | 2,410 | 27.27 | 88.4 | 
| Casape | Roma | 616 | 5.38 | 114.5 | 
| Casaprota | Rieti | 676 | 14.55 | 46.5 | 
| Casperia | Rieti | 1,203 | 25.31 | 47.5 | 
| Cassino | Frosinone | 34,925 | 83.42 | 418.7 | 
| Castel di Tora | Rieti | 272 | 15.49 | 17.6 | 
| Castel Gandolfo | Roma | 8,538 | 14.19 | 601.7 | 
| Castel Madama | Roma | 7,021 | 28.80 | 243.8 | 
| Castel San Pietro Romano | Roma | 850 | 15.29 | 55.6 | 
| Castel Sant'Angelo | Rieti | 1,171 | 31.27 | 37.4 | 
| Castel Sant'Elia | Viterbo | 2,428 | 23.92 | 101.5 | 
| Castelforte | Latina | 4,024 | 29.71 | 135.4 | 
| Castelliri | Frosinone | 3,149 | 15.32 | 205.5 | 
| Castelnuovo di Farfa | Rieti | 993 | 8.84 | 112.3 | 
| Castelnuovo di Porto | Roma | 8,635 | 30.57 | 282.5 | 
| Castelnuovo Parano | Frosinone | 848 | 9.88 | 85.8 | 
| Castiglione in Teverina | Viterbo | 2,301 | 19.89 | 115.7 | 
| Castro dei Volsci | Frosinone | 4,350 | 58.45 | 74.4 | 
| Castrocielo | Frosinone | 3,730 | 27.92 | 133.6 | 
| Cave | Roma | 10,889 | 17.88 | 609.0 | 
| Ceccano | Frosinone | 22,098 | 61.06 | 361.9 | 
| Celleno | Viterbo | 1,312 | 23.82 | 55.1 | 
| Cellere | Viterbo | 1,094 | 37.20 | 29.4 | 
| Ceprano | Frosinone | 7,982 | 38.03 | 209.9 | 
| Cerreto Laziale | Roma | 1,061 | 12.08 | 87.8 | 
| Cervara di Roma | Roma | 462 | 31.75 | 14.6 | 
| Cervaro | Frosinone | 7,771 | 39.41 | 197.2 | 
| Cerveteri | Roma | 38,090 | 134.32 | 283.6 | 
| Ciampino | Roma | 38,849 | 13.00 | 2,988.4 | 
| Ciciliano | Roma | 1,244 | 18.85 | 66.0 | 
| Cineto Romano | Roma | 582 | 10.37 | 56.1 | 
| Cisterna di Latina | Latina | 36,253 | 144.16 | 251.5 | 
| Cittaducale | Rieti | 6,417 | 71.25 | 90.1 | 
| Cittareale | Rieti | 375 | 59.67 | 6.3 | 
| Civita Castellana | Viterbo | 15,031 | 84.22 | 178.5 | 
| Civitavecchia | Roma | 51,639 | 73.74 | 700.3 | 
| Civitella d'Agliano | Viterbo | 1,449 | 32.96 | 44.0 | 
| Civitella San Paolo | Roma | 1,994 | 20.75 | 96.1 | 
| Colfelice | Frosinone | 1,768 | 14.52 | 121.8 | 
| Collalto Sabino | Rieti | 381 | 22.37 | 17.0 | 
| Colle di Tora | Rieti | 348 | 14.37 | 24.2 | 
| Colle San Magno | Frosinone | 612 | 44.99 | 13.6 | 
| Colleferro | Roma | 20,456 | 26.99 | 757.9 | 
| Collegiove | Rieti | 128 | 10.61 | 12.1 | 
| Collepardo | Frosinone | 866 | 24.68 | 35.1 | 
| Collevecchio | Rieti | 1,609 | 26.95 | 59.7 | 
| Colli sul Velino | Rieti | 462 | 12.76 | 36.2 | 
| Colonna | Roma | 4,258 | 3.55 | 1,199.4 | 
| Concerviano | Rieti | 278 | 21.39 | 13.0 | 
| Configni | Rieti | 568 | 22.93 | 24.8 | 
| Contigliano | Rieti | 3,659 | 53.55 | 68.3 | 
| Corchiano | Viterbo | 3,526 | 33.03 | 106.8 | 
| Coreno Ausonio | Frosinone | 1,489 | 26.38 | 56.4 | 
| Cori | Latina | 10,407 | 85.31 | 122.0 | 
| Cottanello | Rieti | 527 | 36.70 | 14.4 | 
| Esperia | Frosinone | 3,560 | 108.57 | 32.8 | 
| Fabrica di Roma | Viterbo | 8,175 | 34.79 | 235.0 | 
| Faleria | Viterbo | 2,008 | 25.68 | 78.2 | 
| Falvaterra | Frosinone | 515 | 12.73 | 40.5 | 
| Fara in Sabina | Rieti | 13,891 | 54.96 | 252.7 | 
| Farnese | Viterbo | 1,348 | 52.38 | 25.7 | 
| Ferentino | Frosinone | 19,969 | 81.00 | 246.5 | 
| Fiamignano | Rieti | 1,157 | 100.62 | 11.5 | 
| Fiano Romano | Roma | 16,666 | 41.19 | 404.6 | 
| Filacciano | Roma | 467 | 5.66 | 82.5 | 
| Filettino | Frosinone | 536 | 78.08 | 6.9 | 
| Fiuggi | Frosinone | 10,180 | 32.98 | 308.7 | 
| Fiumicino | Roma | 83,075 | 213.89 | 388.4 | 
| Fondi | Latina | 39,869 | 143.92 | 277.0 | 
| Fontana Liri | Frosinone | 2,630 | 16.11 | 163.3 | 
| Fonte Nuova | Roma | 32,697 | 19.94 | 1,639.8 | 
| Fontechiari | Frosinone | 1,197 | 16.15 | 74.1 | 
| Forano | Rieti | 3,276 | 17.69 | 185.2 | 
| Formello | Roma | 13,860 | 31.15 | 444.9 | 
| Formia | Latina | 36,781 | 74.17 | 495.9 | 
| Frascati | Roma | 22,883 | 22.48 | 1,017.9 | 
| Frasso Sabino | Rieti | 738 | 4.39 | 168.1 | 
| Frosinone | Frosinone | 43,099 | 46.85 | 919.9 | 
| Fumone | Frosinone | 1,940 | 14.84 | 130.7 | 
| Gaeta | Latina | 19,115 | 29.20 | 654.6 | 
| Gallese | Viterbo | 2,558 | 37.17 | 68.8 | 
| Gallicano nel Lazio | Roma | 6,488 | 25.70 | 252.5 | 
| Gallinaro | Frosinone | 1,176 | 17.74 | 66.3 | 
| Gavignano | Roma | 1,860 | 15.04 | 123.7 | 
| Genazzano | Roma | 5,717 | 32.07 | 178.3 | 
| Genzano di Roma | Roma | 22,511 | 17.90 | 1,257.6 | 
| Gerano | Roma | 1,128 | 10.12 | 111.5 | 
| Giuliano di Roma | Frosinone | 2,297 | 33.54 | 68.5 | 
| Gorga | Roma | 653 | 26.19 | 24.9 | 
| Gradoli | Viterbo | 1,225 | 43.81 | 28.0 | 
| Graffignano | Viterbo | 2,070 | 29.10 | 71.1 | 
| Greccio | Rieti | 1,464 | 17.86 | 82.0 | 
| Grottaferrata | Roma | 20,304 | 18.40 | 1,103.5 | 
| Grotte di Castro | Viterbo | 2,395 | 33.42 | 71.7 | 
| Guarcino | Frosinone | 1,492 | 40.37 | 37.0 | 
| Guidonia Montecelio | Roma | 89,165 | 79.47 | 1,122.0 | 
| Ischia di Castro | Viterbo | 2,117 | 104.95 | 20.2 | 
| Isola del Liri | Frosinone | 10,557 | 16.01 | 659.4 | 
| Itri | Latina | 10,485 | 101.10 | 103.7 | 
| Jenne | Roma | 319 | 31.45 | 10.1 | 
| Labico | Roma | 6,476 | 11.75 | 551.1 | 
| Labro | Rieti | 345 | 11.75 | 29.4 | 
| Ladispoli | Roma | 40,819 | 25.95 | 1,573.0 | 
| Lanuvio | Roma | 12,934 | 43.76 | 295.6 | 
| Lariano | Roma | 13,267 | 22.53 | 588.9 | 
| Latera | Viterbo | 777 | 22.43 | 34.6 | 
| Latina | Latina | 127,732 | 277.62 | 460.1 | 
| Lenola | Latina | 4,119 | 45.24 | 91.0 | 
| Leonessa | Rieti | 2,047 | 204.04 | 10.0 | 
| Licenza | Roma | 957 | 17.99 | 53.2 | 
| Longone Sabino | Rieti | 513 | 34.33 | 14.9 | 
| Lubriano | Viterbo | 852 | 16.69 | 51.0 | 
| Maenza | Latina | 2,949 | 42.13 | 70.0 | 
| Magliano Romano | Roma | 1,366 | 20.52 | 66.6 | 
| Magliano Sabina | Rieti | 3,448 | 43.23 | 79.8 | 
| Mandela | Roma | 909 | 13.72 | 66.3 | 
| Manziana | Roma | 7,758 | 24.00 | 323.3 | 
| Marano Equo | Roma | 770 | 7.65 | 100.7 | 
| Marcellina | Roma | 7,038 | 15.36 | 458.2 | 
| Marcetelli | Rieti | 53 | 11.08 | 4.8 | 
| Marino | Roma | 46,571 | 24.19 | 1,925.2 | 
| Marta | Viterbo | 3,194 | 33.54 | 95.2 | 
| Mazzano Romano | Roma | 2,908 | 29.07 | 100.0 | 
| Mentana | Roma | 22,588 | 24.27 | 930.7 | 
| Micigliano | Rieti | 120 | 36.85 | 3.3 | 
| Minturno | Latina | 20,435 | 42.14 | 484.9 | 
| Mompeo | Rieti | 516 | 10.89 | 47.4 | 
| Montalto di Castro | Viterbo | 8,654 | 189.63 | 45.6 | 
| Montasola | Rieti | 396 | 12.75 | 31.1 | 
| Monte Compatri | Roma | 11,810 | 24.57 | 480.7 | 
| Monte Porzio Catone | Roma | 8,581 | 9.13 | 939.9 | 
| Monte Romano | Viterbo | 1,868 | 86.14 | 21.7 | 
| Monte San Biagio | Latina | 6,019 | 65.10 | 92.5 | 
| Monte San Giovanni Campano | Frosinone | 11,878 | 48.71 | 243.9 | 
| Monte San Giovanni in Sabina | Rieti | 666 | 30.76 | 21.7 | 
| Montebuono | Rieti | 835 | 19.73 | 42.3 | 
| Montefiascone | Viterbo | 12,994 | 104.93 | 123.8 | 
| Monteflavio | Roma | 1,124 | 16.84 | 66.7 | 
| Montelanico | Roma | 2,006 | 35.14 | 57.1 | 
| Monteleone Sabino | Rieti | 1,131 | 19.04 | 59.4 | 
| Montelibretti | Roma | 5,121 | 45.43 | 112.7 | 
| Montenero Sabino | Rieti | 263 | 22.59 | 11.6 | 
| Monterosi | Viterbo | 4,761 | 10.68 | 445.8 | 
| Monterotondo | Roma | 41,103 | 40.94 | 1,004.0 | 
| Montopoli di Sabina | Rieti | 4,107 | 37.94 | 108.2 | 
| Montorio Romano | Roma | 1,936 | 23.39 | 82.8 | 
| Moricone | Roma | 2,410 | 19.59 | 123.0 | 
| Morlupo | Roma | 8,441 | 24.08 | 350.5 | 
| Morolo | Frosinone | 3,144 | 26.57 | 118.3 | 
| Morro Reatino | Rieti | 337 | 15.74 | 21.4 | 
| Nazzano | Roma | 1,313 | 12.40 | 105.9 | 
| Nemi | Roma | 1,855 | 7.33 | 253.1 | 
| Nepi | Viterbo | 9,564 | 83.71 | 114.3 | 
| Nerola | Roma | 1,940 | 17.10 | 113.5 | 
| Nespolo | Rieti | 207 | 8.65 | 23.9 | 
| Nettuno | Roma | 48,173 | 71.64 | 672.4 | 
| Norma | Latina | 3,751 | 31.22 | 120.1 | 
| Olevano Romano | Roma | 6,325 | 26.16 | 241.8 | 
| Onano | Viterbo | 864 | 24.51 | 35.3 | 
| Oriolo Romano | Viterbo | 3,708 | 19.31 | 192.0 | 
| Orte | Viterbo | 9,091 | 69.56 | 130.7 | 
| Orvinio | Rieti | 385 | 24.69 | 15.6 | 
| Paganico Sabino | Rieti | 162 | 9.31 | 17.4 | 
| Palestrina | Roma | 22,122 | 47.02 | 470.5 | 
| Paliano | Frosinone | 7,854 | 70.64 | 111.2 | 
| Palombara Sabina | Roma | 13,102 | 75.80 | 172.8 | 
| Pastena | Frosinone | 1,265 | 42.16 | 30.0 | 
| Patrica | Frosinone | 3,036 | 27.31 | 111.2 | 
| Percile | Roma | 217 | 17.76 | 12.2 | 
| Pescorocchiano | Rieti | 1,805 | 94.78 | 19.0 | 
| Pescosolido | Frosinone | 1,384 | 44.90 | 30.8 | 
| Petrella Salto | Rieti | 1,028 | 102.93 | 10.0 | 
| Piansano | Viterbo | 2,015 | 26.61 | 75.7 | 
| Picinisco | Frosinone | 1,100 | 62.15 | 17.7 | 
| Pico | Frosinone | 2,587 | 32.93 | 78.6 | 
| Piedimonte San Germano | Frosinone | 6,306 | 17.32 | 364.1 | 
| Piglio | Frosinone | 4,304 | 35.38 | 121.7 | 
| Pignataro Interamna | Frosinone | 2,378 | 24.41 | 97.4 | 
| Pisoniano | Roma | 726 | 12.92 | 56.2 | 
| Pofi | Frosinone | 3,858 | 30.68 | 125.7 | 
| Poggio Bustone | Rieti | 1,963 | 22.38 | 87.7 | 
| Poggio Catino | Rieti | 1,312 | 14.98 | 87.6 | 
| Poggio Mirteto | Rieti | 6,077 | 26.40 | 230.2 | 
| Poggio Moiano | Rieti | 2,764 | 26.95 | 102.6 | 
| Poggio Nativo | Rieti | 2,573 | 16.50 | 155.9 | 
| Poggio San Lorenzo | Rieti | 554 | 8.67 | 63.9 | 
| Poli | Roma | 2,221 | 21.75 | 102.1 | 
| Pomezia | Roma | 64,994 | 86.57 | 750.8 | 
| Pontecorvo | Frosinone | 12,099 | 88.80 | 136.3 | 
| Pontinia | Latina | 15,099 | 112.10 | 134.7 | 
| Ponza | Latina | 3,311 | 10.16 | 325.9 | 
| Ponzano Romano | Roma | 1,254 | 19.52 | 64.2 | 
| Posta | Rieti | 534 | 66.01 | 8.1 | 
| Posta Fibreno | Frosinone | 1,036 | 9.80 | 105.7 | 
| Pozzaglia Sabina | Rieti | 306 | 24.98 | 12.2 | 
| Priverno | Latina | 13,704 | 56.98 | 240.5 | 
| Proceno | Viterbo | 535 | 42.02 | 12.7 | 
| Prossedi | Latina | 1,134 | 35.37 | 32.1 | 
| Riano | Roma | 10,406 | 25.43 | 409.2 | 
| Rieti | Rieti | 45,169 | 206.46 | 218.8 | 
| Rignano Flaminio | Roma | 10,175 | 38.56 | 263.9 | 
| Riofreddo | Roma | 744 | 12.38 | 60.1 | 
| Ripi | Frosinone | 5,019 | 31.61 | 158.8 | 
| Rivodutri | Rieti | 1,119 | 26.79 | 41.8 | 
| Rocca Canterano | Roma | 169 | 15.84 | 10.7 | 
| Rocca d'Arce | Frosinone | 843 | 11.58 | 72.8 | 
| Rocca di Cave | Roma | 364 | 11.09 | 32.8 | 
| Rocca di Papa | Roma | 17,945 | 39.72 | 451.8 | 
| Rocca Massima | Latina | 1,117 | 18.17 | 61.5 | 
| Rocca Priora | Roma | 12,065 | 28.27 | 426.8 | 
| Rocca Santo Stefano | Roma | 903 | 9.57 | 94.4 | 
| Rocca Sinibalda | Rieti | 800 | 49.56 | 16.1 | 
| Roccagiovine | Roma | 245 | 8.41 | 29.1 | 
| Roccagorga | Latina | 4,112 | 24.49 | 167.9 | 
| Roccantica | Rieti | 525 | 16.72 | 31.4 | 
| Roccasecca | Frosinone | 6,712 | 43.33 | 154.9 | 
| Roccasecca dei Volsci | Latina | 1,055 | 23.50 | 44.9 | 
| Roiate | Roma | 638 | 10.35 | 61.6 | 
| Roma | Roma | 2,746,984 | 1,287.36 | 2,133.8 | 
| Ronciglione | Viterbo | 8,419 | 52.53 | 160.3 | 
| Roviano | Roma | 1,226 | 8.50 | 144.2 | 
| Sabaudia | Latina | 19,293 | 145.37 | 132.7 | 
| Sacrofano | Roma | 7,469 | 28.43 | 262.7 | 
| Salisano | Rieti | 476 | 17.60 | 27.0 | 
| Sambuci | Roma | 821 | 8.30 | 98.9 | 
| San Biagio Saracinisco | Frosinone | 294 | 31.21 | 9.4 | 
| San Cesareo | Roma | 16,366 | 23.64 | 692.3 | 
| San Donato Val di Comino | Frosinone | 1,859 | 37.64 | 49.4 | 
| San Felice Circeo | Latina | 10,071 | 32.63 | 308.6 | 
| San Giorgio a Liri | Frosinone | 2,944 | 15.71 | 187.4 | 
| San Giovanni Incarico | Frosinone | 3,025 | 24.71 | 122.4 | 
| San Gregorio da Sassola | Roma | 1,397 | 35.45 | 39.4 | 
| San Lorenzo Nuovo | Viterbo | 2,006 | 26.74 | 75.0 | 
| San Polo dei Cavalieri | Roma | 2,786 | 42.53 | 65.5 | 
| San Vito Romano | Roma | 3,020 | 12.66 | 238.5 | 
| San Vittore del Lazio | Frosinone | 2,311 | 27.51 | 84.0 | 
| Santa Marinella | Roma | 871 | 9.03 | 96.5 | 
| Sant'Ambrogio sul Garigliano | Frosinone | 1,256 | 17.11 | 73.4 | 
| Sant'Andrea del Garigliano | Frosinone | 4,981 | 21.36 | 233.2 | 
| Sant'Angelo Romano | Roma | 1,802 | 18.02 | 100.0 | 
| Sant'Apollinare | Frosinone | 5,596 | 41.10 | 136.2 | 
| Sant'Elia Fiumerapido | Frosinone | 3,423 | 43.89 | 78.0 | 
| Santi Cosma e Damiano | Latina | 18,480 | 48.91 | 377.8 | 
| Santopadre | Frosinone | 6,875 | 31.61 | 217.5 | 
| Sant'Oreste | Roma | 1,179 | 21.60 | 54.6 | 
| Saracinesco | Roma | 178 | 11.16 | 15.9 | 
| Scandriglia | Rieti | 3,313 | 63.35 | 52.3 | 
| Segni | Roma | 8,947 | 60.86 | 147.0 | 
| Selci | Rieti | 1,149 | 7.73 | 148.6 | 
| Sermoneta | Latina | 9,958 | 45.00 | 221.3 | 
| Serrone | Frosinone | 2,928 | 15.39 | 190.3 | 
| Settefrati | Frosinone | 704 | 50.68 | 13.9 | 
| Sezze | Latina | 23,683 | 100.47 | 235.7 | 
| Sgurgola | Frosinone | 2,366 | 19.22 | 123.1 | 
| Sonnino | Latina | 7,403 | 63.82 | 116.0 | 
| Sora | Frosinone | 24,712 | 72.13 | 342.6 | 
| Soriano nel Cimino | Viterbo | 7,828 | 78.54 | 99.7 | 
| Sperlonga | Latina | 3,009 | 19.49 | 154.4 | 
| Spigno Saturnia | Latina | 2,840 | 38.74 | 73.3 | 
| Stimigliano | Rieti | 2,226 | 11.38 | 195.6 | 
| Strangolagalli | Frosinone | 2,258 | 10.57 | 213.6 | 
| Subiaco | Roma | 8,524 | 63.23 | 134.8 | 
| Supino | Frosinone | 4,587 | 35.59 | 128.9 | 
| Sutri | Viterbo | 6,712 | 60.94 | 110.1 | 
| Tarano | Rieti | 1,365 | 19.98 | 68.3 | 
| Tarquinia | Viterbo | 15,829 | 279.34 | 56.7 | 
| Terelle | Frosinone | 277 | 31.65 | 8.8 | 
| Terracina | Latina | 44,792 | 136.59 | 327.9 | 
| Tessennano | Viterbo | 290 | 14.73 | 19.7 | 
| Tivoli | Roma | 55,107 | 68.65 | 802.7 | 
| Toffia | Rieti | 1,071 | 11.33 | 94.5 | 
| Tolfa | Roma | 4,663 | 168.27 | 27.7 | 
| Torre Cajetani | Frosinone | 1,312 | 11.99 | 109.4 | 
| Torri in Sabina | Rieti | 1,214 | 26.31 | 46.1 | 
| Torrice | Frosinone | 4,666 | 18.06 | 258.4 | 
| Torricella in Sabina | Rieti | 1,294 | 25.79 | 50.2 | 
| Torrita Tiberina | Roma | 1,084 | 10.78 | 100.6 | 
| Trevi nel Lazio | Frosinone | 1,694 | 54.32 | 31.2 | 
| Trevignano Romano | Roma | 5,782 | 38.99 | 148.3 | 
| Trivigliano | Frosinone | 1,618 | 12.64 | 128.0 | 
| Turania | Rieti | 237 | 8.51 | 27.8 | 
| Tuscania | Viterbo | 8,200 | 208.69 | 39.3 | 
| Vacone | Rieti | 223 | 9.19 | 24.3 | 
| Valentano | Viterbo | 2,853 | 43.50 | 65.6 | 
| Vallecorsa | Frosinone | 2,359 | 39.28 | 60.1 | 
| Vallemaio | Frosinone | 888 | 18.54 | 47.9 | 
| Vallepietra | Roma | 228 | 52.94 | 4.3 | 
| Vallerano | Viterbo | 2,387 | 15.45 | 154.5 | 
| Vallerotonda | Frosinone | 1,373 | 59.66 | 23.0 | 
| Vallinfreda | Roma | 265 | 16.72 | 15.8 | 
| Valmontone | Roma | 15,677 | 40.91 | 383.2 | 
| Varco Sabino | Rieti | 152 | 24.75 | 6.1 | 
| Vasanello | Viterbo | 3,966 | 28.96 | 136.9 | 
| Vejano | Viterbo | 2,156 | 44.31 | 48.7 | 
| Velletri | Roma | 52,872 | 118.23 | 447.2 | 
| Ventotene | Latina | 685 | 1.75 | 391.4 | 
| Veroli | Frosinone | 19,451 | 119.65 | 162.6 | 
| Vetralla | Viterbo | 13,361 | 113.77 | 117.4 | 
| Vicalvi | Frosinone | 723 | 8.21 | 88.1 | 
| Vico nel Lazio | Frosinone | 2,050 | 45.85 | 44.7 | 
| Vicovaro | Roma | 3,518 | 35.94 | 97.9 | 
| Vignanello | Viterbo | 4,263 | 20.53 | 207.6 | 
| Villa Latina | Frosinone | 1,115 | 17.02 | 65.5 | 
| Villa San Giovanni in Tuscia | Viterbo | 1,208 | 5.28 | 228.8 | 
| Villa Santa Lucia | Frosinone | 2,444 | 17.77 | 137.5 | 
| Villa Santo Stefano | Frosinone | 1,580 | 20.10 | 78.6 | 
| Viterbo | Viterbo | 66,365 | 406.23 | 163.4 | 
| Viticuso | Frosinone | 286 | 20.86 | 13.7 | 
| Vitorchiano | Viterbo | 5,232 | 30.14 | 173.6 | 
| Vivaro Romano | Roma | 156 | 12.54 | 12.4 | 
| Zagarolo | Roma | 18,852 | 28.04 | 672.3 |