This is a list of sister states, regions, and cities in the U.S. state of Maryland. Sister cities, known in Europe as town twins, are cities which partner with each other to promote human contact and cultural links, although this partnering is not limited to cities and often includes counties, regions, states and other sub-national entities.

Many Maryland jurisdictions partner with foreign cities through Sister Cities International, an organization whose goal is to, "Promote peace through mutual respect, understanding, and cooperation." The first sister city relationship in Maryland, however, was between Salisbury, Maryland and Salisbury, England, and predated Sister Cities International. Sister cities interact with each other across a broad range of activities, from health care and education to business and the arts. The partnerships in this list vary in how formalized their relationships are. Recently, a number of Maryland cities have partnered with cities in Estonia through a program developed by the Maryland National Guard after Estonia gained its independence from the Soviet Union. <onlyinclude>

Sister states, regions and cities of Maryland

Maryland JurisdictionSister State, Region, or CityCountrySinceState of MarylandAnhui Province China1980Tartu Estonia2003Gyeongsangnam-do Province South Korea1991|} </onlyinclude>Jalisco State Mexico1993Kanagawa Prefecture Japan1981Bong County Liberia2007Maryland County Liberia2007Łódź Voivodeship Poland1993Nord-Pas de Calais France1981State of Rio de Janeiro Brazil1999Saint PetersburgLeningrad Oblast Russia1993Wallonia Region Belgium1989County Cork Ireland <onlyinclude>

Sister cities of Maryland cities and counties Maryland JurisdictionSister State, Region, or CityCountrySinceAnnapolisAnnapolis Royal, Nova Scotia Canada1980Changsha, China ChinaUnknownDumfries, Dumfries and Galloway Scotland, UK1987Newport Wales, UK1982Niterói, Rio de Janeiro Brazil1982Tallinn, Harju County Estonia1999Wexford, County Wexford Ireland1993BaltimoreAlexandria, Alexandria Governorate Egypt1995Ashkelon, Southern District Israel2005Changwon South Korea2018Gbarnga, Bong County Liberia1973Genoa, Liguria Italy1985Kawasaki, Kanagawa Prefecture Japan1978Luxor, Luxor Governorate Egypt1981Odesa, Odesa Oblast Ukraine1974Piraeus, Attica Greece1982Rotterdam, South Holland Netherlands1985Xiamen, Fujian China1985Charles CountyJõgeva, Jõgeva County Estonia2012Walldorf, Baden-Württemberg Germany2002ColumbiaCergy-Pontoise, Île-de-France France1977Tres Cantos, Community of Madrid Spain1990CumberlandTapa, Lääne-Viru County Estonia2000District HeightsMbuji-Mayi, Kasai-Oriental Province DR Congo2008Thomonde, Centre HaitiFrederickAquiraz, Ceará Brazil2006Mörzheim, Landau, Rhineland-Palatinate Germany1982Schifferstadt, Rhineland-Palatinate Germany1982FrostburgViljandi, Viljandi County Estonia2000GrantsvilleTõrva, Valga County Estonia2000HagerstownWesel, North Rhine-Westphalia Germany1952Havre de GraceSillamäe, Ida-Viru County Estonia2000McHenryOtepää, Valga County Estonia2000Montgomery CountyGondar, Amhara EthiopiaMorazán Department El Salvador2011OaklandTőrca, Valga County EstoniaValga, Valga County Estonia2000Ocean CityFinale Ligure, Liguria Italy1996Pärnu, Pärnu County Estonia2003Prince George's CountyRishon Le Zion, Central District Israel1990Royal Bafokeng Nation, North West Province South Africa1998Ziguinchor, Casamance Senegal1987Riverdale ParkIpala, Chiquimula Guatemala2008RockvilleJiaxing, Zhejiang ("friendly" relations) China2008Pinneberg, Schleswig-Holstein Germany1957Yilan City, Yilan County Taiwan2019SalisburySalisbury, Wiltshire England, UK1932Tartu, Tartu County Estonia1999Salinas, Santa Elena Ecuador2017WestminsterPaide, Järva County Estonia2002

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