The title of Earl of Devon was created several times in the Peerage of England, and was possessed first by the de Reviers family, and later for the Courtenay. It is not to be confused with the title of "Earl of Devonshire", held along with the title of Duke of Devonshire by the Cavendish family, although the patent for the creation of those peerages used the same Latin words, Comes Devon. The title was dormant for several centuries after the death of the last Earl in 1556, but a Courtenay successfully claimed the title in the mid-19th century.

Unlike the Dukes of Devonshire, the Earls of Devon are strongly connected with the county of Devon. Their seat is Powderham Castle, near Starcross on the River Exe.

Earls of Devon, First Creation (1141)

• Baldwin de Reviers, 1st Earl of Devon (d. 1155)
• Richard de Reviers, 2nd Earl of Devon (d. 1162)
• Baldwin de Reviers, 3rd Earl od Devon (d. 1188)
• Richard de Reviers, 4th Earl of Devon (d. 1193)
• William de Reviers, 5th Earl of Devon (d. 1217)
• Baldwin de Reviers, 6th Earl of Devon (1217-1245)
• Baldwin de Reviers, 7th Earl of Devon (1236-1262)

Earls of Devon, Second Creation (1335)

• Hugh de Courtenay, 1st Earl of Devon (1276-1340)
• Hugh de Courtenay, 2nd Earl of Devon (1303-1377)
• Edward de Courtenay, 3rd Earl of Devon (1357-1419)
• Hugh de Courtenay, 4th Earl of Devon (1389-1422)
• Thomas de Courtenay, 5th Earl of Devon (1414-1458)
• Thomas Courtenay, 6th Earl of Devon (1432-1461) (fofeit 1461)
• John Courtenay, 7th Earl of Devon (1435-1471) (restored 1470; forfeit 1471)
• Edward Courtenay, 8th Earl of Devon (d. 1509) (restored 1485; forfeit 1509)
• William Courtenay, 9th Earl of Devon (1475-1511) (restored 1511)
• Henry Courtenay, 1st Marquess of Exeter, 10th Earl of Devon (1498-1539) (forfeit 1538)
• Edward Courtenay, 11th Earl of Devon (1527-1556) (restored 1553; dormant 1556)
• William Courtenay, 9th Earl of Devon (1768-1835) (revived 1831)¹
• William Courtenay, 10th Earl of Devon (1777-1859)
• William Reginald Courtenay, 11th Earl of Devon (1807-1888)
• Edward Baldwin Courtenay, 12th Earl of Devon (1836-1891)
• Henry Hugh Courtenay, 13th Earl of Devon (1811-1904)
• Charles Pepys Courtenay, 14th Earl of Devon (1870-1927)
• Henry Hugh Courtenay, 15th Earl of Devon (1872-1935)
• Frederick Leslie Courtenay, 16th Earl of Devon (1875-1935)
• Charles Christopher Courtenay, 17th Earl of Devon (1916-1998)
• Hugh Rupert Courtenay, 18th Earl of Devon (b. 1942)

Earls of Devon, Third Creation (1469)

• Humphrey Stafford, 1st Earl of Devon (1439-1469)

Earls of Devon, Fourth Creation (1603)

• Charles Blount, 1st Earl of Devon (1563-1606)

¹The numbering is discontinuous between the dormancy and the revival, for reasons that are unclear. The reason might be that the family numbered the possible Earl of Devon domesticly anew, and the Sovereign allowed this numbering retrospectively in 1831.