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◄ 66^th 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.

#	Code	Country	Number of participants
			C	L	DL	OA	OB	OC
Number of participants			641	113	113	55	47	42
1	ALB	Albania	6	1	1			1
2	ALG	Algeria	5	1	1	1	1
3	ARG	Argentina	6	1	1	1
4	ARM	Armenia	6	1	1
5	AUS	Australia	6	1	1	2	1	1
6	AUT	Austria	6	1	1
7	AZE	Azerbaijan	6	1	1	1
8	BGD	Bangladesh	6	1	1			1
9	BLR	Belarus	6	1	1
10	BEL	Belgium	6	1	1	1
11	BTN	Bhutan	6	1	1	1	1
12	BOL	Bolivia	4		1
13	BIH	Bosnia and Herzegovina	6	1	1
14	BWA	Botswana	6	1	1			1
15	BRA	Brazil	6	1	1	3	2
16	BGR	Bulgaria	6	1	1
17	BFA	Burkina Faso		1	1
18	KHM	Cambodia	6	1	1	1	1	1
19	CMR	Cameroon	1	1	1
20	CAN	Canada	6	1	1		1
21	CHI	Chile	3	1	1
22	CHN	People's Republic of China	6	1	1	1	1	9
23	COL	Colombia	6	1	1
24	CRI	Costa Rica	6	1	1
25	HRV	Croatia	6	1	1
26	CUB	Cuba	6	1
27	CYP	Cyprus	6	1	1
28	CZE	Czech Republic	6	1	1
29	DEN	Denmark	6	1	1
30	DOM	Dominican Republic	6	1	1
31	ECU	Ecuador	6	1	1
32	EST	Estonia	6	1	1	1
33	FIN	Finland	6	1	1
34	FRA	France	6	1	1
35	GEO	Georgia	6	1	1		1	1
36	GER	Germany	6	1	1	1
37	GHA	Ghana	2	1	1
38	HEL	Greece	6	1	1			3
39	HND	Honduras	6	1	1
40	HKG	Hong Kong	6	1	1		1	1
41	HUN	Hungary	6	1	1	2		1
42	ISL	Iceland	6	1	1
43	IND	India	6	1	1	1	1
44	IDN	Indonesia	6	1	1		1
45	IRQ	Iraq	6	1	1
46	IRN	Islamic Republic of Iran	6	1	1	1	1	1
47	IRL	Ireland	6	1	1	1
48	ISR	Israel	6	1	1	1	1	1
49	ITA	Italy	6	1	1	1
50	CIV	Ivory Coast	6	1	1	1	1
51	JPN	Japan	6	1	1	3	1
52	KAZ	Kazakhstan	6	1	1
53	KEN	Kenya	6	1	1			2
54	KOR	Republic of Korea	6	1	1	2	2
55	KSV	Kosovo	6	1	1			2
56	KGZ	Kyrgyzstan	6	1	1
57	LVA	Latvia	6	1	1
58	LBY	Libya				1
59	LIE	Liechtenstein	1	1	1
60	LTU	Lithuania	6	1	1
61	LUX	Luxembourg	3	1	1
62	MAC	Macau	6	1	1
63	MAS	Malaysia	6	1	1	1
64	MRT	Mauritania	6	1	1
65	MEX	Mexico	6	1	1	1
66	MDA	Republic of Moldova	6	1	1
67	MNG	Mongolia	6	1	1	2		3
68	MNE	Montenegro	6	1	1
69	MAR	Morocco	6	1	1	1	1	1
70	MMR	Myanmar	6	1	1	1
71	NAM	Namibia	4	1	1
72	NPL	Nepal	6	1	1		1	2
73	NLD	Netherlands	6	1	1		1	1
74	NZL	New Zealand	6	1	1
75	NIC	Nicaragua	3	1	1
76	MKD	North Macedonia	6	1	1
77	NOR	Norway	6	1	1
78	PAK	Pakistan	6	1	1
79	PSE	Palestine	6	1	1	1	1	1
80	PAR	Paraguay	4	1	1
81	PER	Peru	6	1	1
82	PHI	Philippines	6	1	1		1
83	POL	Poland	6	1	1
84	POR	Portugal	6	1	1
85	PRI	Puerto Rico	3	1	1		1
86	QAT	Qatar	6	1	1			2
87	ROU	Romania	6	1	1	2	1
88	RUS	Russian Federation	6	1	1	2
89	RWA	Rwanda	6	1	1
90	SLV	El Salvador	3	1	1
91	SAU	Saudi Arabia	6	1	1	2	2	2
92	SRB	Serbia	6	1	1
93	SGP	Singapore	6	1	1	1	3
94	SVK	Slovakia	6	1	1	1
95	SVN	Slovenia	6	1	1
96	SAF	South Africa	6	1	1
97	ESP	Spain	6	1	1
98	LKA	Sri Lanka	6	1	1
99	SWE	Sweden	6	1	1
100	SUI	Switzerland	6	1	1
101	SYR	Syria	6	1	1
102	TWN	Taiwan	6	1	1	2	2
103	TJK	Tajikistan	6	1	1		1
104	THA	Thailand	6	1	1	1	3
105	TUN	Tunisia	6	1	1		1
106	TUR	Türkiye	6	1	1	2
107	TKM	Turkmenistan	6	1	1	1	1
108	UGA	Uganda	6	1	1			1
109	UKR	Ukraine	6	1	1	3	1	1
110	UAE	United Arab Emirates	6	1	1
111	UNK	United Kingdom	6	1	1	1		2
112	USA	United States of America	6	1	1	1
113	URY	Uruguay	5	1	1
114	UZB	Uzbekistan	6	1	1		1
115	VNM	Vietnam	6	1	1	1	7

General enquiries can be made to Ava Yeo, IMO Board Office: Ava Yeo   •   Webmaster: webmaster@imo-official.org   •   Copyright © 2006 International Mathematical Olympiad. All rights reserved.