 Allumiere (RM): Puçol (Valencia - Spain), since 2006; Eglfing (Bavaria - Germany), since 2001; Deutschkreutz (Austria), since 1999 |
| Amatrice (RI): Montorio al Vomano (Teramo-Abruzzo-Italy); Potenza (Basilicata-Italia) |
| Anagni (FR): Isle sur la Sorgue (France); Gniezno (Poland); Migdal Haemek (Israel) |
| Anguillara Sabazia (RM): Blanca (Murcia, Spain) |
| Arcinazzo Romano (RM): Santiponce (Spain) |
| Ardea (RM): Rielasingen-Worblingen (Germany) |
| Artena (RM): Alcalà del Rio (Spain) |
| Atina (FR): Basilea (Switzerland); Veroli (Frosinone – Lazio - Italy); Newton Mass. (United States); Augusta Raurica (Switzerland) |
| Ausonia (FR): Berzé-La-Ville (France) |
| Bracciano (RM): La Marsa (Tunisia); Viroflay (France) |
| Carpineto Romano (RM): Wadowice (Poland); Cascia (Perugia-Umbria-Italy); Hamrun (Malta) |
| Cassino (FR): Cavarzere (Venice-Veneto - Italy), since 26th April 1998; Uzice (Federal Republic of Yugoslavia), since 1981; Tychy (Poland), since 1977; Zamosc (Poland), since 1969; Falaise (France), since 1974; Ortona (Chieti-Abruzzo-Italy), since 1991; North York (Canada), since 1987; Karlovy Vary (Czech Republic), since 1991; Casino (Australia), since 1997; Berlino Zehlendorf (Germany), since 1969 |
| Castel Gandolfo (RM): Chateauneuf du Pape (France) |
| Cave (RM): Cateau-Cambrésis (France, since 2005) |
| Ceccano (FR): Plouzané (Finistère department in Bretagne, France); Cancun (Mexico) |
| Celleno (VT): Serock (Poland) |
| Ciampino (RM): Pendik (Turkey) |
| Cisterna di Latina (LT): Grombalia (Tunisia); Punta Umbrìa (Spain); Fort Smith (Arkansas, United States) |
| Civitavecchia (RM): Ishinomaki (Japan); Betlemme (Gaza Strip); Amelia (Terni - Umbria - Italy); Nantong (People’s Republic of China) |
| Contigliano (RI): Talarrubias (Spain), since 2007 |
| Coreno Ausonio (FR): Blonie (Masovian, Poland) |
| Fondi (LT): Dachau (Germany), since 1998 |
| Formia (LT): Gracanica (Bosnia); Santeramo in Colle (Bari - Apulia - Italy); Fleury-les Aubrais (France); Ferrara (Emilia-Romagna - Italy); Haninge (Sweden) |
| Frascati (RM): Kortrijk (Belgium); Windsor-Maidenhead (United Kingdom); Saint Cloud (France); Bonn-Bad Godesberg (Germany) |
| Genzano di Roma (RM): Merseburg (Germany); Mokotov-Varsavia (Poland); Chatillon (France) |
| Gerano (RM): Gharb (Gozo - Malta) |
| Greccio (RI): Guardea (Terni-Umbria-Italy); Betlemme, since 1992; San Donato Val di Comino (Frosinone-Lazio-Italy) |
| Lanuvio (RM): Centuripe (Enna-Sicily-Italy) |
| Lenola (LT): Mondragon (France); Grotte (Agrigento-Sicily-Italy); Marmolejo (Spain) |
| Minturno (LT): Jyvaskyla (Finland); Pilas (Spain); Stamford (United States) |
| Monte Compatri (RM): Calahorra (La Rioja, Spain) |
| Nettuno (RM): Corinaldo (Ancona - Marche - Italy), since October 2004; Traunreut (Germany), since October 1973 |
| Palestrina (RM): Fussen (Germany); Bièvres (France), since 2007 |
| Percile (RM): Alrance (France) |
| Pisoniano (RM): Sannat (Malta) |
| Poggio Mirteto (RI): Canejan (France) |
| Poggio Moiano (RI): Montferrand le Chateau (France) |
| Pontinia (LT): Goro (Ferrara, Emilia Romagna, Italy); Utena (Lithuania) |
| Prossedi (LT): Opountion (Greece), since September 2005 |
| Rieti (RI): Ito (Shizuoka, Japan) |
| Rivodutri (RI): Candelario (Spain); Seregelyes (Hungary) |
| Rocca Priora (RM): Sohland a.d. Spree (Germany) |
| Roccasecca (FR): Croissy-Beaubourg (Île-de-France, France) |
| San Donato Val di Comino (FR): Greccio (Rieti-Lazio-Italy) |
| Sermoneta (LT): Arborea (Oristano - Sardinia - Italy); San Fulgencio (Spain); Mortegliano (Udine - Friuli Venezia Giulia - Italy); Atalanti (Greece) |
| Sora (FR): Athis Mons (France); Vaughan (Canada) |
| Subiaco (RM): Ochsenhausen (Germany), since 1989; Subiaco (Australia) |
| Supino (FR): Cirò Marina (Calabria), since May 2007; Sasd (Hungary), since July 2007 |
| Tarquinia (VT): Jaruco (La Havana - Cuba); Rabat (Malta) |
| Terracina (LT): Spa (Belgium), since October 1956; Exeter (United Kingdom), since 1988; Pecs (Hungary), since 1996; Jurmala (Latvia), since 1986; Chur (Switzerland), since October 1956; Bougie (Algeria), since October 1956; Bad Mondorf (Luxembourg), since October 1956; Mayrhofen (Austria), since October 1956; Bad Homburg (Germany), since October 1956; Cabourg (France), since October 1956 |
| Vasanello (VT): Dschang (Camerun); Asnes (Norway) |
| Veroli (FR): Spinea (Venice-Veneto-Italy); Bruck an der Mur (Austria) |
| Zagarolo (RM): Nelahozeves (Czech Republic); Six Four les Plages (France) |
The sister cities for the towns in Lazio, the cooperative agreements with european and other towns all over the world
