The city of Xi'an has 30 official sister cities:
Nara (Japan), February 1, 1974
Kyoto (Japan), May 10, 1974
Edinburgh (UK), April 16, 1985
Pau (France) September 15, 1986
Kansas City (USA), April 29, 1989
Esfahan (Iran), May 6, 1989
Lahore (Pakistan), June 20, 1992
Dortmund (Germany), July 22, 1992
Funabashi (Japan), November 2, 1994
Gyeongju (South Korea), November 18, 1994
Iasi (Romania), December 6, 1994
Dnipropetrovsk (Ukraine), October 27, 1995
Konya (Turkey), September 8, 1996
Kathmandu (Nepal), September 12, 1996
Brasilia (Brazil), October 26, 1997
Quebec (Canada), May 11, 2001
Cordoba (Argentina), December 19, 2006
Pompeii (Italy), October 13, 2007
Kalamata (Greece), September 17, 2009
Cuenca (Ecuador), September 8, 2010
Groningen (the Netherlands), November 7, 2011
Kotor (Montenegro), May 6, 2013
Samarqand (Uzbekistan), November 29, 2013
Oldenburg (Germany), September 11, 2017
Mary (Turkmenistan), May 12, 2014
Montgomery County (USA), June 11, 2014
Hobart (Australia), March 29, 2015
Gyumri (Armenia), June 8 , 2015
Jinju (South Korea), May 15, 2016
Kragujevac (Serbia), June 18 , 2016