James Warren Doyle, OESA (1786–1834) was a Roman Catholic Bishop of Kildare and Leighlin in Ireland, who used the signature "JKL", an acronym from "James Kildare and Leighlin." Doyle was active in the Anti-Tithe movement. A campaigner for Catholic Emancipation until it was attained in 1829, he was also an educator, church organiser and the builder of Carlow cathedral.