What was Dio’s first solo studio album after leaving Black Sabbath?

Dio’s first solo studio album after leaving Black Sabbath was Holy Diver.

Holy Diver was released in 1983 by the band Dio, formed by vocalist Ronnie James Dio after his departures from Black Sabbath and Rainbow. The album was recorded with guitarist Vivian Campbell, bassist Jimmy Bain, and drummer Vinny Appice, who had also played with Dio in Black Sabbath.

The record introduced a new stage identity built around dramatic fantasy imagery and powerful traditional heavy-metal songwriting. Its title track and “Rainbow in the Dark” became enduring metal classics. Holy Diver was produced by Ronnie James Dio and released through Warner Bros. Records in the United States.

The album is sometimes confused with The Last in Line, Dio’s second studio album, which followed in 1984. Holy Diver is significant because it established Dio as the leader of a successful band bearing his own name, rather than simply as the former singer of another group.