International: European Choral Association – Europa Cantat (http://www.europeanchoralassociation.org/)

Austria: Chorverband Vorarlberg (https://www.chorverbandvlbg.at/)

Belgium:
– A Coeur Joie Belgique (http://www.acj.be/)
– Koor & Stem (https://www.koorenstem.be/)

Canada: Choral Canada (http://www.choralcanada.org/)
Also certain provincial websites:
– Alliance des Chorales du Québec (https://www.chorales.ca/)
– coming soon: Alberta, Newfoundland, Nova Scotia

Finland:
– Sulasol (https://sulasol.fi/)

France:
– A Coeur Joie France (https://www.choralies.org/)
– CNSM de Lyon (http://www.cnsmd-lyon.fr/)
– Fédération des Choeurs Franco-Allemands (http://www.dfc-cfa.org/)

Germany:
– Deutsches Centrum für Chormusik (https://www.dcfc.de/)
– Verband der Deutsch-Französischen Chöre (DFC) (http://www.dfc-cfa.org/)
– Choir Manager (https://www.choirmanager.com/)

Ireland: Association of Irish Choirs (https://www.aoic.ie)

New Zealand: New Zealand Choral Federation (https://www.nzcf.org.nz/)

Philippines: Philippine Choral Directors Association (https://www.mypcda.org)

Slovenia: Javni sklad republike Slovenije (http://www.jskd.si/)

Switzerland:
– Union Suisse des Chorales (https://www.usc-scv.ch)
– A Coeur Joie Suisse (https://www.acj-suisse.ch/)
– Fédération Fribourgeoise des Chorales (http://www.chant.ch/)

Turkey: Koro Kültürü Derneği (http://www.korokulturu.org/)

USA: American Choral Directors Association (https://acda.org/ -> “Membership resources” )