Demand compared to the Continental Championship four years ago in France is almost twice as large, and the gaps available are 2.5 million.
Of greatest interest is the Wembley final in London on July 12, for which 714,000 applications have been received.
“The group stage match between France and Germany in Munich on June 16 is also very attractive to fans, with 710,000 ticket requests for it,” UEFA explained.
Euro 2020 will take place from 12 June to 12 July in 12 European cities.
“64 percent of requests come from countries that host matches from the tournament,” UEFA explained.