The countries with the most nuclear reactors in operation in 2026

32 countries operate nuclear reactors today, out of 442 reactors worldwide.

The country with the most nuclear reactors in operation is the United States, with 94 units and 96,952 MWe net, 21% of the world total. Among the top five, United States (94), China (63), France (57), Russia (34) and Japan (33) account for 281 reactors, 64% of the world total.

#	Country	Reactors in operation	MWe
1	United States	94	96,952
2	China	63	62,329
3	France	57	63,000
4	Russia	34	27,969
5	Japan	33	31,679
6	South Korea	26	25,609
7	India	24	8,055
8	Canada	17	12,714
9	Ukraine	15	13,107
10	United Kingdom	9	5,883
11	Spain	7	7,123
12	Sweden	6	7,008
13	Czech Republic	6	3,963
14	Pakistan	6	3,262
15	Finland	5	4,369
16	Slovakia	5	2,302
17	United Arab Emirates	4	5,348
18	Switzerland	4	2,973
19	Hungary	4	1,916
20	Argentina	3	1,641
21	Belarus	2	2,220
22	Belgium	2	2,056
23	Bulgaria	2	2,006
24	Brazil	2	1,884
25	South Africa	2	1,854
26	Mexico	2	1,552
27	Romania	2	1,300
28	North Korea	2	35
29	Iran	1	915
30	Slovenia	1	696
31	Netherlands	1	482
32	Armenia	1	416

Data: Global Energy Monitor (CC BY 4.0), IAEA PRIS 2025, Wikipedia (CC BY-SA), Wikidata and Wikimedia Commons. Capacities in net MWe unless stated.

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