Most densely populated municipalities

The 20 municipalities in Lazio with the highest people per km², and the 20 with the lowest, out of 114 with a published figure.

	Municipality	Region	Postal code	People per km²
1	Roma	Lazio	00144	2,134.7 /km²
2	Marino	Lazio	00047	1,916.0 /km²
3	Anzio	Lazio	00042	1,350.5 /km²
4	Grottaferrata	Lazio	00046	1,113.8 /km²
5	Frascati	Lazio	00044	1,014.0 /km²
6	Monterotondo	Lazio	00015	1,001.0 /km²
7	Ariccia	Lazio	00072	967.6 /km²
8	Frosinone	Lazio	03029	926.7 /km²
9	San Cesareo	Lazio	00030	676.3 /km²
10	Isola del Liri	Lazio	03036	670.5 /km²
11	Nettuno	Lazio	00048	670.5 /km²
12	Gaeta	Lazio	04024	665.2 /km²
13	Castel Gandolfo	Lazio	00073	603.5 /km²
14	Cave	Lazio	00033	602.7 /km²
15	Lariano	Lazio	00076	586.4 /km²
16	Formia	Lazio	04023	500.7 /km²
17	Latina	Lazio	04020	459.5 /km²
18	Velletri	Lazio	00049	444.3 /km²
19	Valmontone	Lazio	00038	382.8 /km²
20	Ceccano	Lazio	03023	365.5 /km²

Most sparsely populated municipalities

	Municipality	Region	Postal code	People per km²
1	Acquafondata	Lazio	03040	10.3 /km²
2	Amatrice	Lazio	02012	12.9 /km²
3	Orvinio	Lazio	02035	16.0 /km²
4	Rocca Sinibalda	Lazio	02026	16.0 /km²
5	Castel di Tora	Lazio	02020	17.2 /km²
6	Collalto Sabino	Lazio	02022	17.5 /km²
7	Tolfa	Lazio	00059	28.3 /km²
8	Civita	Lazio	01022	28.5 /km²
9	Pastena	Lazio	03020	30.0 /km²
10	Montasola	Lazio	02040	30.7 /km²
11	Blera	Lazio	01010	31.9 /km²
12	Antrodoco	Lazio	02013	36.5 /km²
13	Tuscania	Lazio	01017	39.4 /km²
14	Acquapendente	Lazio	01021	40.0 /km²
15	Canino	Lazio	01011	40.5 /km²
16	Allumiere	Lazio	00051	40.7 /km²
17	Roccasecca dei Volsci	Lazio	04010	44.4 /km²
18	Montalto di Castro	Lazio	01014	46.0 /km²
19	Torri in Sabina	Lazio	02049	46.0 /km²
20	Casperia	Lazio	02041	46.5 /km²

Most densely populated municipalities — All of Italy

One row per municipalities. The figures are published by municipality, so every postal code inside one shares them; the postal code shown is one of that municipality's.