| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Maccarese | city | Lazio | Italy | 41.88 | 12.22 | 13 | 158788 |
| Macere | city | Lazio | Italy | 41.75 | 12.87 | 1066 | 29007 |
| Madonna della Quercia | city | Lazio | Italy | 42.42 | 12.10 | 1177 | 39717 |
| Madonna di Roselli | city | Lazio | Italy | 41.65 | 13.72 | 1194 | 8131 |
| Maenza | city | Lazio | Italy | 41.52 | 13.18 | 147 | 15581 |
| Magliana | city | Lazio | Italy | 41.83 | 12.42 | 22 | 176144 |
| Magliana Vecchia | city | Lazio | Italy | 41.83 | 12.42 | 22 | 176144 |
| Maglianello | city | Lazio | Italy | 42.37 | 12.85 | 1669 | 19308 |
| Magliano Romano | city | Lazio | Italy | 42.17 | 12.43 | 830 | 12247 |
| Magliano Sabina | city | Lazio | Italy | 42.37 | 12.48 | 830 | 6570 |
| Magliano Sabino | city | Lazio | Italy | 42.37 | 12.48 | 830 | 6570 |
| Magugnano | city | Lazio | Italy | 42.52 | 12.17 | 830 | 4467 |
| Malagrotta | city | Lazio | Italy | 41.88 | 12.33 | 160 | 176005 |
| Mandela | city | Lazio | Italy | 42.03 | 12.92 | 1256 | 7471 |
| Manziana | city | Lazio | Italy | 42.13 | 12.13 | 987 | 14884 |
| Mar fan Bolsena | city | Lazio | Italy | 42.65 | 11.98 | 1669 | 6042 |
| Marano | city | Lazio | Italy | 42.00 | 13.02 | 1669 | 7161 |
| Marano Equo | city | Lazio | Italy | 42.00 | 13.02 | 1669 | 7161 |
| Maranola | city | Lazio | Italy | 41.28 | 13.62 | 311 | 30361 |
| Marcellina | city | Lazio | Italy | 42.02 | 12.80 | 984 | 32275 |
| Marcetelli | city | Lazio | Italy | 42.22 | 13.03 | 3349 | 1678 |
| Marcigliana | city | Lazio | Italy | 42.02 | 12.52 | 160 | 153636 |
| Marianitto | city | Lazio | Italy | 42.58 | 13.17 | 3349 | 1443 |
| Marino | city | Lazio | Italy | 41.77 | 12.65 | 974 | 111413 |
| Marta | city | Lazio | Italy | 42.53 | 11.92 | 1240 | 5136 |
| Mazzano Romano | city | Lazio | Italy | 42.20 | 12.40 | 830 | 7571 |
| Melfa | city | Lazio | Italy | 41.53 | 13.65 | 380 | 12958 |
| Mentana | city | Lazio | Italy | 42.03 | 12.63 | 830 | 90064 |
| Mesa | city | Lazio | Italy | 41.38 | 13.12 | 9 | 7960 |
| Micciani | city | Lazio | Italy | 42.35 | 13.00 | 2066 | 3943 |
| Micigliano | city | Lazio | Italy | 42.45 | 13.05 | 2509 | 1949 |
| Minturno | city | Lazio | Italy | 41.25 | 13.75 | 26 | 26904 |
| Mji wa Roma | city | Lazio | Italy | 41.90 | 12.48 | 49 | 175936 |
| Moggio | city | Lazio | Italy | 42.50 | 12.73 | 1669 | 21177 |
| Moletano | city | Lazio | Italy | 42.62 | 13.32 | 3684 | 1491 |
| Mompeo | city | Lazio | Italy | 42.25 | 12.75 | 830 | 7532 |
| Mons Leonis Sabinus | city | Lazio | Italy | 42.23 | 12.85 | 1669 | 6096 |
| Montagliano | city | Lazio | Italy | 42.13 | 13.02 | 1847 | 2607 |
| Montalfina | city | Lazio | Italy | 42.68 | 11.95 | 1824 | 5974 |
| Montalto di Castro | city | Lazio | Italy | 42.35 | 11.62 | 82 | 3919 |
| Montasola | city | Lazio | Italy | 42.38 | 12.68 | 2509 | 3132 |
| Montattico | city | Lazio | Italy | 41.62 | 13.72 | 2509 | 6612 |
| Monte Compatri | city | Lazio | Italy | 41.80 | 12.73 | 2509 | 61660 |
| Monte Flavio | city | Lazio | Italy | 42.10 | 12.83 | 3349 | 8222 |
| Monte Libretti | city | Lazio | Italy | 42.13 | 12.78 | 1669 | 10002 |
| Monte Maggiore | city | Lazio | Italy | 42.15 | 12.68 | 328 | 13750 |
| Monte Porzio | city | Lazio | Italy | 41.73 | 12.72 | 2509 | 54965 |
| Monte Porzio | city | Lazio | Italy | 41.82 | 12.72 | 1669 | 72674 |
| Monte Porzio Catone | city | Lazio | Italy | 41.82 | 12.72 | 1669 | 72674 |
| Monte Romano | city | Lazio | Italy | 42.27 | 11.90 | 984 | 3559 |
| Monte Sacro | city | Lazio | Italy | 41.93 | 12.53 | 78 | 175869 |
| Monte San Biagio | city | Lazio | Italy | 41.35 | 13.35 | 16 | 13022 |
| Monte San Giovanni Campano | city | Lazio | Italy | 41.63 | 13.52 | 830 | 23623 |
| Monte San Giovanni in Sabina | city | Lazio | Italy | 42.33 | 12.78 | 2509 | 5360 |
| Monte Santa Maria | city | Lazio | Italy | 42.22 | 12.77 | 1099 | 9684 |
| Monte Santa Maria in Sabina | city | Lazio | Italy | 42.22 | 12.77 | 1099 | 9684 |
| Monte di Leva | city | Lazio | Italy | 41.70 | 12.47 | 321 | 135096 |
| Montebuono | city | Lazio | Italy | 42.37 | 12.60 | 830 | 4622 |
| Montecalvello | city | Lazio | Italy | 42.55 | 12.22 | 400 | 5299 |
| Montecelio | city | Lazio | Italy | 42.02 | 12.73 | 830 | 51584 |
| Montecompatri | city | Lazio | Italy | 41.80 | 12.73 | 2509 | 61660 |
| Montefiascone | city | Lazio | Italy | 42.53 | 12.03 | 1669 | 13162 |
| Montelanico | city | Lazio | Italy | 41.65 | 13.03 | 1030 | 7057 |
| Monteleone Sabino | city | Lazio | Italy | 42.23 | 12.85 | 1669 | 6096 |
| Montello | city | Lazio | Italy | 41.50 | 12.77 | 62 | 28082 |
| Montenero in Sabina | city | Lazio | Italy | 42.28 | 12.82 | 2509 | 4071 |
| Monterosi | city | Lazio | Italy | 42.20 | 12.30 | 925 | 11291 |
| Monterotondo | city | Lazio | Italy | 42.05 | 12.62 | 830 | 81700 |
| Montevirginio | city | Lazio | Italy | 42.15 | 12.12 | 1669 | 12807 |
| Monticchio | city | Lazio | Italy | 41.53 | 12.97 | 62 | 24374 |
| Monticelli | city | Lazio | Italy | 41.40 | 13.65 | 830 | 7335 |
| Montopoli in Sabina | city | Lazio | Italy | 42.25 | 12.68 | 830 | 11898 |
| Montorio Romano | city | Lazio | Italy | 42.13 | 12.80 | 2509 | 8892 |
| Montorio in Valle | city | Lazio | Italy | 42.15 | 12.98 | 2509 | 1834 |
| Moricone | city | Lazio | Italy | 42.12 | 12.77 | 1082 | 10754 |
| Morlupo | city | Lazio | Italy | 42.13 | 12.50 | 830 | 18860 |
| Morolo | city | Lazio | Italy | 41.63 | 13.20 | 882 | 12458 |
| Morro Reatino | city | Lazio | Italy | 42.53 | 12.83 | 2562 | 5957 |
| Mozza | city | Lazio | Italy | 42.40 | 13.02 | 1669 | 5013 |
| Mugnano | city | Lazio | Italy | 42.50 | 12.28 | 246 | 7534 |
| Munti San Biaggiu | city | Lazio | Italy | 41.35 | 13.35 | 16 | 13022 |
| Muntiliuni Sabinu | city | Lazio | Italy | 42.23 | 12.85 | 1669 | 6096 |
| Musignano | city | Lazio | Italy | 42.43 | 11.72 | 413 | 3895 |