Daniel Sullivan (died 1764) was an Irish countertenor, best known for his association with composer Georg Frideric Handel.
He began his career in the early 1740s, gaining recognition for his performances with John Frederick and his wife Isabella Lampe.
His early notable work included a role in John Lampe's The Dragon of Wantley at Drury Lane in 1743.
In 1744, Sullivan joined Handel's circle, performing in one of his Covent Garden oratorios.
That same year, he took on the role of Athamas in Semele (Handel) Originally written for a tenor, but the part was adapted by Handel to suit Sullivan’s countertenor range.