The 23-year-old has signed a five-year contract with a buyout clause valued at 300 million euros, it added.
“With… a height of 186 cm (6 ft 1 in), Lenglet arrives at Barca after success in Seville, where he led the defence with elegance and determination,” the club said.
Lenglet has been one of Sevilla’s stand-out players this season, with then coach Vincenzo Montella admitting earlier this year his French defender had the talent to play for a club like Barcelona.
Sevilla initially signed the French player in January 2017 from Nancy on a four-year deal.
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