Boyle, Roger (c.1617–1687), Church of Ireland bishop of Clogher, was perhaps the son of Thomas Boyle, vicar of Timoleague and a relative of Richard Boyle (qv), earl of Cork, or of Robert Boyle, vicar of Carrickmacross and prebend of Tullycorbet, in the diocese of Clogher. He was certainly a younger brother of Richard Boyle (d. c.January 1683), bishop of Ferns and Leighlin. He was admitted a scholar of TCD on 22 May 1638. His career over the next two decades is uncertain, though at one time (possibly from 1 September 1646) he was a fellow of TCD, and is sometimes reckoned to have spent the 1640s and 1650s in England as tutor to Lord Paulet. In 1667 the duke of Ormond (qv) spoke of Boyle as having acted as his chaplain in earlier times. He was named rector of Carrigaline and Ringrone, in Cork diocese, in 1660, apparently on the recommendation of Ormond, and became prebend of Liscleary on 24 July 1662 and dean of Cork on 9 October 1662. He was appointed precentor of Ross on 6 February 1663 and exchanged that position for the treasurership of Cloyne on 26 September 1663. He was awarded a DD by TCD in 1664, the same year in which he first published his Inquisitio in fidem christianorum hujus saeculi (Cork, 1664; Dublin, 1665).
In August 1667 Ormond recommended Boyle, ‘a stout and prudent as a learned and pious person’ (CSPI, 1660–62, 431) for a bishopric, and he received a patent as bishop of Down and Connor on 12 or 19 September 1667, surrendering his other offices, and was consecrated in October 1667. His ‘disorderly and disaffected’ dioceses (Greaves, 408) contained a large presbyterian population, but Boyle was not regarded as an energetic enforcer of conformity. Pressed by Bishop Robert Leslie (qv) of Raphoe to emulate Leslie's actions against presbyterian ministers, his efforts to prosecute ministers in the church courts, in 1670, were unwelcome in the light of then current royal policy, and countered by presbyterian appeals to leading figures in church and state. The primate, Archbishop James Margetson (qv), asserted his authority and the prosecutions were dropped. On 19 September 1672 Boyle was translated to the see of Clogher. His Summa theologiae christianae (Dublin, 1681), a substantial work, was intended as a response to the lack of ‘a corpus of Theology . . . agreeable to the Anglican church in every part’ (Bolton, 40). His commonplace book is held by the library of TCD. He died 26 November 1687 and was buried in Clones, Co. Monaghan.