AHOoptimist
North America & Central
Antilles, Netherlands (AHO)
Fédération Algérienne de Voile
Africa
Algeria (ALG)
Federacio Andorrana de Vela
Europe
Andorra (AND)
Antigua Yacht Club
North America & Central
Antigua (ANT)
Asociación Optimist Argentina
South America
Argentina (ARG)
Azerbaijan Sailing Federation (SFA)
Europe
Azerbaijan (AZE)
Bahamas Optimist Dinghy Association
North America & Central
Bahamas (BAH)
Bermuda Optimist Dinghy Association
North America & Central
Bermuda (BER)
Belize Sailing Association
North America & Central
Belize (BIZ)
Belarus Sailing Federation
Europe
Belarus (BLR)
Bulgarian Sailing Federation
Europe
Bulgaria (BUL)
Canadian Optimist Dinghy Association (CODA)
North America & Central
Canada (CAN)
Cayman Islands Sailing Club
North America & Central
Cayman Islands (CAY)
Club Optimist Chile
South America
Chile (CHI)
Chinese Yachting Association
Asia
China, PR (CHN)
Federacion Colombiana de Vela
South America
Columbia (COL)
La Fragata Sailing Club
North America & Central
COSTA RICA (CRC)
HRVATSKO UDRUŽENJE KLASE OPTIMIST
Europe
Croatia (CRO)
Cyprus Sailing Federation
Europe
Cyprus (CYP)
Czech Optimist Dinghy Association
Europe
Czech Republic (CZE)
Optimist Class Denmark
Europe
Denmark (DEN)
Asociacion de Optimist del Ecuador (AOE)
South America
Ecuador (ECU)
Salvador Sailing Association
North America & Central
El Salvador (ESA)
Classe Optimist France
Europe
France (FRA)
International Optimist Class Association UK
Europe
Great Britain (GBR)
Hellenic Sailing Federation
Europe
Greece (GRE)
Grenada Sailing Association
North America & Central
Grenada (GRN)
Hong Kong Optimist Dinghy Association
Asia
Hong Kong, China (HKG)
Hungarian Sailing Federation
Europe
Hungary (HUN)
Indonesian Sailing Federation
Asia
Indonesia (INA)
Israel Optimist Class Association
Europe
Israel (ISR)
Virgin Island Optimist Dinghy Association (VIODA)
North America & Central
US Virgin Islands (ISV)
Royal British Virgin Islands Yacht Club
North America & Central
British Virgin Islands (IVB)
Kazakhstan Sailing Federation
Asia
Kazakhstan (KAZ)
Kuwait Sea Sport Club
Asia
Kuwait (KUW)
Libyan Sailing Federation
Africa
Libya (LBA)
Saint Lucia Sailing Association
North America & Central
St Lucia (LCA)
Lithuanian Optimist Association
Europe
Lithuania (LTU)
Associacao de Vela de Macau (AVM)
Asia
Macau, China (MAC)
Malaysia Sailing Association
Asia
Malaysia (MAS)
Asociación Mexicana de Veleros Clase Optimist (AMVCO)
North America & Central
Mexico (MEX)
Montenegro Sailing Federation
Europe
Montenegro (MNE)
Yacht Club de Monaco
Europe
Monaco (MON)
Mauritius Yachting Association
Africa
Mauritius (MRI)
Myanmar Yachting Federation
Asia
Myanmar (MYA)
Optimist Club Nederland
Europe
Netherlands (NED)
Norsk Optimistjolleklubb (NOK)
Europe
Norway (NOR)
Oman Sailing Committee
Asia
Oman (OMA)
Optimist Sailing Panama (OSP)
South America
Panama (PAN)
Asociacion Clase Optimist del Paraguay (ACOP)
South America
Paraguay (PAR)
Asociación Peruana de Optimist
South America
Peru (PER)
Puerto Rico Optimist Association (PROA)
North America & Central
Puerto Rico (PUR)
Optimist Sailing South Africa
Africa
South Africa (RSA)
Seychelles Yachting Association
Africa
Seychelles (SEY)
Singapore Sailing Federation
Asia
Singapore (SGP)
Slovenian Sailing Federation
Europe
Slovenia (SLO)
Serbian Sailing Association
Europe
Serbia (SRB)
Yachting Association of Sri Lanka
Asia
Sri Lanka (SRI)
Sudan Sailing Federation
Africa
Sudan (SUD)
Swiss Optimist
Europe
Switzerland (SUI)
Slovak Optimist Association
Europe
Slovakia (SVK)
Svenska Optimistjolleforbundet
Europe
Sweden (SWE)
Tanzania Optimist Dinghy Association
Africa
Tanzania (TAN)
Turks and Caicos, Provo Sailing Academy
North America & Central
Turks and Caicos (TCA)
TJK Sailing
Asia
Tajikistan (TJK)
Chinese Taipei Sailing Association
Asia
Chinese Taipei (TPE)
Trinidad & Tobago Sailing Association (TTSA)
North America & Central
Trinidad and Tobago (TTO)
Fédération Tunisienne de Voile
Africa
Tunisia (TUN)
Turkish Sailing Federation
Europe
Turkey (TUR)
UAE Sailing & Rowing Federation
Asia
United Arab Emirates (UAE)
Asociación Uruguaya de Optimist (AUDO)
South America
Uruguay (URU)
US Optimist Dinghy Association (USODA)
North America & Central
USA (USA)
Federación Venezolana de Vela
South America
Venezuela (VEN)
St Vincent and the Grenadines Sailing Association
North America & Central
ST VINCENT AND THE GRENADINES (VIN)