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66th IMO 2025

Participating countries

This is the list of countries which have confirmed that they will participate at this IMO. The final list of participating countries will be published along with the official results of the IMO.

#CodeCountryNumber of participants
CLDLOAOBOC
Number of participants641113113554742
1ALBAlbania6111
2ALGAlgeria51111
3ARGArgentina6111
4ARMArmenia611
5AUSAustralia611211
6AUTAustria611
7AZEAzerbaijan6111
8BGDBangladesh6111
9BLRBelarus611
10BELBelgium6111
11BTNBhutan61111
12BOLBolivia41
13BIHBosnia and Herzegovina611
14BWABotswana6111
15BRABrazil61132
16BGRBulgaria611
17BFABurkina Faso11
18KHMCambodia611111
19CMRCameroon111
20CANCanada6111
21CHIChile311
22CHNPeople's Republic of China611119
23COLColombia611
24CRICosta Rica611
25HRVCroatia611
26CUBCuba61
27CYPCyprus611
28CZECzech Republic611
29DENDenmark611
30DOMDominican Republic611
31ECUEcuador611
32ESTEstonia6111
33FINFinland611
34FRAFrance611
35GEOGeorgia61111
36GERGermany6111
37GHAGhana211
38HELGreece6113
39HNDHonduras611
40HKGHong Kong61111
41HUNHungary61121
42ISLIceland611
43INDIndia61111
44IDNIndonesia6111
45IRQIraq611
46IRNIslamic Republic of Iran611111
47IRLIreland6111
48ISRIsrael611111
49ITAItaly6111
50CIVIvory Coast61111
51JPNJapan61131
52KAZKazakhstan611
53KENKenya6112
54KORRepublic of Korea61122
55KSVKosovo6112
56KGZKyrgyzstan611
57LVALatvia611
58LBYLibya1
59LIELiechtenstein111
60LTULithuania611
61LUXLuxembourg311
62MACMacau611
63MASMalaysia6111
64MRTMauritania611
65MEXMexico6111
66MDARepublic of Moldova611
67MNGMongolia61123
68MNEMontenegro611
69MARMorocco611111
70MMRMyanmar6111
71NAMNamibia411
72NPLNepal61112
73NLDNetherlands61111
74NZLNew Zealand611
75NICNicaragua311
76MKDNorth Macedonia611
77NORNorway611
78PAKPakistan611
79PSEPalestine611111
80PARParaguay411
81PERPeru611
82PHIPhilippines6111
83POLPoland611
84PORPortugal611
85PRIPuerto Rico3111
86QATQatar6112
87ROURomania61121
88RUSRussian Federation6112
89RWARwanda611
90SLVEl Salvador311
91SAUSaudi Arabia611222
92SRBSerbia611
93SGPSingapore61113
94SVKSlovakia6111
95SVNSlovenia611
96SAFSouth Africa611
97ESPSpain611
98LKASri Lanka611
99SWESweden611
100SUISwitzerland611
101SYRSyria611
102TWNTaiwan61122
103TJKTajikistan6111
104THAThailand61113
105TUNTunisia6111
106TURTürkiye6112
107TKMTurkmenistan61111
108UGAUganda6111
109UKRUkraine611311
110UAEUnited Arab Emirates611
111UNKUnited Kingdom61112
112USAUnited States of America6111
113URYUruguay511
114UZBUzbekistan6111
115VNMVietnam61117
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