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.

The Bishop of Kildare and Leighlin is the ordinary of the Roman Catholic Diocese of Kildare and Leighlin, one of the suffragan dioceses of the Archdiocese of Dublin. The episcopal title takes its name from the towns of Kildare and Old Leighlin in the province of Leinster, Ireland.