Argentina
- Municipality of Buenos Aires
- Municipality of La Plata
Armenia
- Municipality of Hrazdan
Australia
- Australian Capital Territory Government
- Ashfield Municipal Council
- Bega Valley Shire Council
- Burwood Council
- City of Lake Macquarie
- City of Sydney
- Coffs Harbour City Council
- Gosford City Council
- Holroyd City Council
- Hunters Hill Council
- Kogarah Council
- Leichhardt Municipal Council
- Liverpool City Council
- Mosman Municipal Council
- North Sydney Council
- Palerang Council
- Parramatta City Council
- Richmond Valley Council
- Shellharbour City Council
- Snowy River Shire Council
- Strathfield Municipal Council
- Alice Springs Town Council
- Brisbane City Council
- Cairns Regional Council
- Ipswich City Council
- Sunshine Coast Regional Council
- Townsville City Council
- Adelaide City Council
- Campbelltown City Council SA
- City of Burnside
- City of Marion
- City of Onkaparinga
- City of West Torrens
- District Council of Mount Barker
- Ballarat City Council
- Bass Coast Shire Council
- Benalla Rural City Council
- Brimbank City Council
- Cardinia Shire Council
- City of Greater Geelong
- City of Melbourne
- City of Port Phillip
- City of Whitehorse Council
- City of Whittlesea Council
- City of Wodonga
- City of Yarra
- Colac Otway Shire Council
- East Gippsland Shire Council
- Greater Shepparton Shire Council
- Hepburn Shire Council
- Manningham City Council
- Maroondah City Council
- Mildura Rural City Council
- Moira Shire Council
- Moorabool Shire Council
- Rural City of Wangaratta
- Warrnambool City Council
- Wyndham City Council
- City of Bunbury
- City of Busselton
- City of Greater Geraldton
- City of Joondalup
- City of Mandurah
- City of Melville
- City of Perth
- City of South Perth
- City of Stirling
- City of Subiaco
- City of Vincent
- Rockingham City Council
- Shire of Augusta-Margaret River
- Shire of Dardanup
- Shire of Peppermint Grove
- City of Kwinana
- Australian Local Government Association
Austria
- Magistrat der Stadt Linz
- Stadt Innsbruck
- Umweltverband Vorarlberg
Bangladesh
- Barisal City
- Rajshahi City Corporation
- City of Dhaka
Belgium
- Région de Bruxelles-Capitale
- Van Hoof, Veronique (Associate Member)
Bhutan
- Phuentsholing City Corporation
- Thimphu City Corporation
Bolivia
- Municipality of Santisima Trinidad
Botswana
- Botswana Association of Local Authorities
Brazil
- Alta Floresta
- Apuí
- Bauru
- Belo Horizonte
- Betim
- City Council of Lucas do Rio Verde
- Contagem
- Curitiba
- Goiânia
- Guarulhos
- Itu
- Manaus
- Mariana
- Porto Alegre
- Rio de Janeiro
- Santa Maria
- Santo André
- São Carlos
- São Paulo (Municipality)
- Sorocaba
- State of Minas Gerais (Associate Member)
- State of São Paulo (Associate Member)
- Tailândia
- Volta Redonda
Bulgaria
- Municipality of Burgas
Burkina Faso
Sabce Municipality
Cameroon
- Bafut Municipality
- City of Yokadouma
- Fongo-Tongo Municipality, Cameroon
- Menji Municipality
Canada
- Campbell River
- City of Calgary
- City of Edmonton
- City of Greater Sudbury
- City of Guelph
- City of Hamilton
- City of Kitchener
- City of Mississauga
- City of Regina
- City of Thunder Bay
- City of Toronto
- City of Vancouver
- Durham Region
- Essex
- Federation of Canadian Municipalities
- Fort St. John
- Halton Hills
- Iqaluit
- Leduc
- Marlaina Elliot (Associate Member)
- Metro Vancouver
- Red Deer
- Region of York
- Sustainable Cities International (Associate Member)
- The Blue Mountains
- The Corporation of Delta
- Thunder Bay
- Town of Aurora
- Town of Oakville
- Ville de Montréal
Chile
- Municipality of Chillan
- Municipality of Ñuñoa
- Municipality of Tome
China
- Shenyang, China
Chinese Taipei
- Chia-Yi County
- Hsinchu City
- Kaohsiung
- Pingtung County
- Taichung City
- Tainan
- Taipei City
- New Taipei City Government
- Taiwan Environmental Action Network (Associate Member)
- Taoyuan County
- Yilan County Government
- Yunlin County Government
Colombia
- Municipality of Bogotá
- Municipality of Manizales
Croatia
- City of Koprivnica
- City of Zagreb
- Primorsko-goranska County
Cyprus
- Nicosia Turkish Cypriote Community
Czech Republic
- City of Krnov
Denmark
- Albertslund Kommune
- Ballerup Kommune
- City of Aalborg
- City of Copenhagen
- Kolding Kommune
- National Procurement Ltd.- Denmark (Associate Member)
Equador
- Municipality of Quito
Estonia
- City of Tartu
Ethiopia
- Addis Ababa City Government
Finland
- Association of Finnish Local and Regional Authorities
- City of Espoo
- City of Hämeenlinna
- City of Helsinki
- City of Jyväskylä
- City of Kouvola
- City of Kuopio
- City of Lahti
- City of Oulu
- City of Pori
- City of Riihimäki
- City of Tampere
- City of Turku
- City of Vantaa
- Mariehamns Stad
- Town of Jakobstad
France
- Communauté Urbaine de Dunkerque
- Communauté Urbaine du Grand Nancy
- Communauté Urbaine de Strasbourg
- Lille Métropole Communauté Urbaine
- Montpellier
- Nantes Métropole
- Région Nord-Pas de Calais
- Rhone-Alpes Regional Council
- Ville d'Angers
- Ville de Bordeaux
- Ville de Cluses
- Ville de Coudekerque-Branche
- Ville de Grande-Synthe
- Ville de Saint-Denis
- Ville de Sanary-sur-Mer
Georgia
- City of Tbilisi
Germany
- Berlin
- Freie Hansestadt Bremen
- Freie und Hansestadt Hamburg
- Landeshauptstadt Dresden
- Landeshauptstadt Hannover
- Landkreis Nordhausen
- Stadt Augsburg
- Stadt Beckum
- Stadt Bietigheim-Bissingen
- Stadt Bonn
- Stadt Freiburg
- Stadt Heidelberg
- Stadt Kaufbeuren
- Stadt Ludwigsburg
- Stadt Münster
- Stadt Nordhausen
- Stadt Oranienburg
- Stadt Regensburg
- Stadt Viernheim
- Stadt Wedel
Ghana
- National Association of Local Authorities of Ghana (NALAG)
Greece
- SBAP-Association for the Sustainable Development of Cities
- Municipality of Amaroussion
- Municipality of Trikala
Hungary
- Center for Environmental Studies Foundation (Associate Member)
- City of Miskolc
- Municipality of Tatabánya
Iceland
- City of Reykjavik
India
- Abhijit Sarkar (Associate Member)
- Ahmedabad Municipal Corporation
- All India Institute of Local Self Governance
- Bhavnagar Municipal Corporation
- Bhopal Municipal Corporation
- Bhubaneswar Municipal Corporation
- Chandrapur Municipal Council
- CMAG (Associate Member)
- Coimbatore Municipal Corporation
- Emaar MGF (Associate Member)
- Gandhi Nagar
- Greater Hyderabad Municipal Corporation
- Greater Mumbai Municipal Corporation
- Guntur Municipal Corporation
- Gurgaon Municipal Corporation
- Guwahati Municipal Corporation
- Gwalior Municipal Corporation
- Howrah Chamber of Commerce and Industry (Associate Member)
- Howrah Municipal Corporation
- Jabalpur Municipal Corporation
- Jamnagar Municipal Corporation
- Kalyan Dombivli Municipal Corporation
- Kota Municipal Corporation
- Kolkata Municipal Corporation
- Kolhapur Municipal Corporation
- Kumar Vedulla (Associate Member)
- Madurai Municipal Corporation
- Manish Vaidya (Associate Member)
- Mysore Municipal Corporation
- North Delhi Municipal Corporation
- Nagpur Municipal Corporation
- National Institute of Urban Affairs (Associate Member)
- Parsvnath Developers Ltd (Associate Member)
- Pune Municipal Corporation
- Rajahmundry Municipal Corporation
- Rajkot Municipal Corporation
- Salem Municipal Corporation
- Shimla Municipal Corporation
- Surat Municipal Corporation
- Tenali Municipality
- Thane Municipal Corporation
- Tiruchirappalli Municipal Corporation
- Tiruppur City Municipal Corporation
- Tirunelveli Municipality
- Tirupati Municipal Corporation
- Vadodara Municipal Corporation
- Vijayawada Municipal Corporation
- Vishakhapatnam Municipal Corporation
- Warangal Municipality
Indonesia
- Balikpapan, Indonesia
- Bogor, Indonesia
- Cilegon, Indonesia
- Medan, Indonesia
- Semarang, Indonesia
- Surabaya, Indonesia
- Wakatobi, Indonesia
- Yogyakarta, Indonesia
Iran
- Mashhad
Ireland
- Dublin City Council
Israel
- Jerusalem
- Municipality of Raanana
Italy
- Agenzia InnovA21 per lo Sviluppo Sostenibile (Associate Member)
- Cernusco sul Naviglio local government
- Comune di Ancona
- Comune di Bologna
- Comune di Cesena
- Comune di Livorno
- Comune di Roma
- Comune di Rosignano Marittimo
- Comune di Vignola
- Coordinamento Agende 21 Locali Italiane
- Provincia di Siena
Japan
- Aichi Prefecture
- Fujisawa City
- Hiroshima City
- Iida City
- Itabashi City
- Kanagawa Prefecture
- Kawasaki City
- Kitakyushu City
- Kobe City
- Kumamoto City
- Kyoto City
- Musashino City
- Nagoya City
- Okayama City
- Sapporo City
- Sendai City
- Sumida City
- Tokubetsukukyogikai (Council of Wards in Tokyo)
- Tokyo Metropolitan Government
- Ube City
- Yamanashi Prefecture
Kenya
- Municipal Council of Nakuru
- Municipal Council of Vihiga, Kenya
Latvia
- City of Jurmala
- Riga City Council
Malawi
- The City of Lilongwe
Maldives
- City of Male
Mauritius
- Moka Flacq District Council
- Municipal Council of Port Louis
- Municipal Council of Curepipe
- Pamplemousses and Riviere du Rempart District Council
- Vacoas-Phoenix
Mexico
- Aguascalientes
- Association of Municipalities of Mexico (AMMAC) (Associate Member)
- Centro (Villahermosa)
- Chihuahua
- Ciudad Valles
- Corregidora
- Cuautitlán Izcalli
- Distrito Federal (Mexico City)
- Ecatepec de Morelos
- Estado de Sonora
- Gobierno del Estado de Durango
- Gobierno del Estado de Oaxaca
- Gobierno del Estado de Quetaro de Arteaga
- Gobierno del Estado de Michoacan de Ocampo
- Ixtapa Zihuatanejo
- Léon de los Aldama
- Miguel Hidalgo
- Municipio de Alvarado
- Municipio de Benito Juarez - Cancun
- Municipio del Boca del Rio
- Municipio de Culiacón
- Municipio de Gomez Palacio
- Municipio de Heroica Nogales
- Municipio de Lerdo
- Municipio de Medellin
- Municipio de Monterrey
- Municipio de Oaxaca de Juarez
- Municipio de Saltillo
- Municipio de Tamuin
- Municipio de Toluca de Lerdo
- Municipio de Xalapa
- Puebla
- Querétaro
- San Miguel de Allende
- San Nicolás de los Garza
- Solidaridad (Playa del Carmen)
- Veracruz (Associate Member)
- Veracruz
- Zacatecas (Associate Member)
Mozambique
- The City of Xai Xai
- Lichinga City Municipality
Namibia
- Mariental Municipality
- Ondangwa Council
- Municipality of Swakopmund
- Municipality of Walvis Bay
- City of Windhoek
Nepal
- Hetauda Municipality
- Kathmandu Metropolitan City
- Lalitpur Sub Metropolitan City Office
- Municipal Association of Nepal
- Pokhara Sub Metropolitan city
- RADP (Associate Member)
Netherlands
- City of Amsterdam
- City of Rotterdam
- Gemeente Haarlem
- Gemeente Tilburg
- VNG-Vereniging van Nederlandse Gemeenten
New Zealand
- Kapiti Coast District Council
- Palmerston North City Council
- Auckland Council
- Dunedin Council
Nigeria
- Amuwo Odofin
- Ido Local Government
- Isoko South Local Government
- Lagos State Government
Norway
- Arendal Kommune
- City of Bergen
- City of Oslo
- Drammen Kommune
- Kristiansand Kommune
- KS-Norwegian Association of Local and Regional Authorities
- Lillehammer Kommune
- Lørenskog kommune
- Porsgrunn kommune
- Stavanger kommune
- Stiftelsen Idébanken (Associate Member)
- Tingvoll Kommune
Palestianian Autonomous Territories
- Municipality of Jabalia
Peru
- Municipality of Ate
- Municipality of Cajamarca
Philippines
- Baguio City, Philippines
- Batangas City, Philippines
- Bohol Province, Philippines
- Municipality of Calbiga, Philippines
- Dagupan City, Philippines
- General Santos City, Philippines
- Iloilo City, Philippines
- League of Cities of the Philippines
- Linamon, Lanao del Norte, Philippines
- Lubang Municipality
- Makati City, Philippines
- Municipality of Dumangas, Iloilo
- Municipality of Tublay, Benguet
- Muntinlupa City, Philippines
- Naga City, Philippines
- Puerto Princesa City, Philippines
- Quezon City, Philippines
- Samar Province, Philippines
- San Fernando City, Pampanga, Philippines
- San Fernando City, La Union, Philippines
- Municipality of San Francisco Cebu, Philippines
- Science City of Munoz, Phillipines
- Tubigon, Philippines
- Tuguegarao City, Philippines
Poland
- City of Katowice
Portugal
- Câmara Municipal de Agueda
- Câmara Municipal de Cascais
- Câmara Municipal de Oeiras
- Câmara Municipal de Torres Vedras
- Câmara Municipal de Almada
- Junta de Freguesia de Agualva
Republic of Korea
- Ansan City
- Boryeong City
- Buchen City
- Busan Metropolitan City
- Buyeo County
- Changwon City
- ChejuMBC (Associate member)
- Cheongyang county Government
- Cho, Jung Woong (Associate member)
- Chungcheongnam Province
- Daegu Metropolitan City
- DaeKyung Engineering Co. (Associate member)
- Damyang County
- Dongseo Turism Inc. (Associate member)
- Gangwon Province
- Gapyeong County
- Geumsan County
- Gimpo City
- Gumi City
- Gwacheon City
- Gwangju Metropolitan City
- Gyeonggi Province
- Gyeongsangnam Province
- Gyeryong City
- Hadong County
- Hallailbo (Associate member)
- HanmiParsons Co (Associate member)
- Hoengseong Gun
- Hwaseong City
- Hyun, Hak Soon (Associate member)
- Incheon Metropolitan City
- Issac Holdings (Associate member)
- Jeju Academic Society of Tourisom (Associate member)
- Jeju Biodiversity Research Institute, Jeju Technopark (Associate member)
- Jeju City
- Jeju Development Institution (Associate member)
- Jeju Gymnyeong Mazepark (Associate member)
- Jeju Logistic Transport Company (Associate member)
- Jeju Special Self-Governing Province
- Jeongseon Gun
- Jeonju City
- Kim, Wang Sik (Associate member)
- Korea Environment Corporation (Associate member)
- LSAK(Local Sustainability Alliance of Korea) (Associate member)
- Namyangju City
- National Environment Technology Coperation (Associate member)
- Oh, Seong-Cheol (Associate member)
- Osan Municipality
- Oreum Partners Co. (Associate member)
- Prof. OH Youn-keun (Associate member)
- Pyeongchang Gun
- Seo Min Hye (Associate member)
- Seocheon-gun
- Seogwipo City
- Seongbuk-gu Municipality
- Seongnam City
- Seoul Metropolitan City
- Songpa-gu
- Suncheon City
- Suwon City
- Ulsan Metropolitan City
- Wonju City
- Yangpyeong Gun
- Yeongju City Government
- Yeosu City
- Yong-in City
Romania
- City of Baia Mare
- City of Giurgiu
- Municipality of Odorheiu Secuiesc
- Municipality of Orastie
- Municipality of Pitesti
Russia
- Selenyi Kirov (Associate Member)
Rwanda
- RALGA
Saudi Arabia
- Organization of Islamic Capitals and Cities
Senegal
- Municipality of Nioro du Rip
Serbia
- Standing Conference of Towns and Municipalities of Serbia
Slovak Republic
- Kosice Municipality
South Africa
- Beaufort West City
- Buffalo City Municipality
- Cape Winelands District Municipality
- Capricorn District Municipality
- City of Cape Town
- City of Johannesburg
- City of Tshwane
- Ekurhuleni Metropolitan Municipality
- eThekwini Municipality
- Mangaung Municipality
- Motheo District Municipality
- Nelson, Mandela Metro
- North- West University, Centre for Environmental Management (Potchefstroon campus)
- Pauline Froschauer (Associate Member)
- SALGA
- Sedibeng Municipality
- Sol Plaatje Municipality
- Steve Tshwete Local Municipality
- uMgungundlovu District Municipality
- Tlokwe City Council
- Water Research Commission (Associate Member)
Spain
- Ajuntament de Barcelona
- Ajuntament de Calvià
- Ajuntament de Lloret de Mar
- Ajuntament de Reus
- Ayuntamiento del Real Sitio de San Ildefonso
- Ayuntamiento de San Sebastián de La Gomera
- Ayuntamiento de Santa Úrsula
- Ayuntamiento de Tarragona
- Ayuntamiento de Teulada
- Ayuntamiento de Zaragoza
- Concello de Culleredo
- Diputació de Barcelona
- Las Rozas de Madrid
- Mancomunidad Intermunicipal del Sureste de Gran Canaria
- Red de Municipios Valencianos hacia la Sostenibilidad
- Red Navarra de Entidades Locales hacia la Sostenibilidad
- UDALSAREA 21 - Red Vasca de Municipios hacia la Sostenibilidad
- Vitoria Gasteiz
Sri Lanka
- Galle Municipal Council
- Kandy Municipal Council
- Kurunegala Municipal Corporation
- Matale Municipal Council
Sweden
- City of Göteborg
- City of Malmö
- City of Stockholm
- City of Sundsvall
- Haninge
- Helsingborgs Stad
- Laholms kommun
- Linköpings kommun
- Miljöstyrningsrådet (Associate Member)
- Municipality of Växjö
- Örebro kommun
- TCO Development (Associate Member)
- Ystad
Switzerland
- IGÖB-Interessengemeinschaft ökologische Beschaffung (Associate Member)
- Kanton Basel-Stadt
- Stadt Zürich
- Ville de Genève
Tanzania
- Arusha Municipal Council
- Dar es Salaam
- Geita District Council
- Moshi Municipal Council
- Temeke
Thailand
- Bangkok Metropolitan Administration, Thailand
- Muangklang, Thailand
- Phuket, Thailand
Turkey
- Bursa
- Gaziantep
- Kartal
- Metropolitan Municipality of Konya
- Seferihisar Belediyesi
- Sisli Belediyesi
Uganda
- Kampala Capital City Authority
- Entebbe
- Jinja Municipal Council
- Kasese District Local Government,Uganda
Ukraine
- City of Odessa
- Municipality of Nikolaev
- Uganda Local Government Association
United Kingdom
- Aberdeen
- Birmingham City Council
- Bristol City Council
- City of Glasgow
- Cynnal Cymru (Associate)
- Craigavon Borough Council
- Greater London Authority
- Knowsley Metropolitan Borough Council
- Newcastle City Council
- Royal Haskoning (Associate Member)
- Woking Borough Council
United States of America
Uruguay
- Municipality of Montevideo
Zambia
- The City of Kitwe
- Chongwe District Council
Zimbabwe
- Chinhoyi Municipality
- City of Bulawayo
- City of Gweru
- MDPESA – Munipal Development Partner for Eastern and Southern Africa (Associate Member)
- Municipality of Chegutu
- Mutare City Council
- Rusape Town Council
- Ruwa Local Board