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 (1100)

• Richard de Redvers, 1st Earl of Devon (d. 1107)
• Baldwin de Redvers, 2nd Earl of Devon (d. 1155)
• Richard de Reviers, 3rd Earl of Devon (d. 1162)
• Baldwin de Reviers, 4th Earl of Devon (d. 1188)
• Richard de Reviers, 5th Earl of Devon (d. 1193)
• William de Reviers, 6th Earl of Devon (d. 1217)
• Baldwin de Reviers, 7th Earl of Devon (1217-1245)
• Baldwin de Reviers, 8th Earl of Devon (1236-1262)
• Isabella de Reviers, 9th Countess of Devon (d. 1293)
• Hugh de Courtenay, 10th Earl of Devon (1276-1340)
• Hugh de Courtenay, 11th Earl of Devon (1303-1377)
• Edward de Courtenay, 12th Earl of Devon (1357-1419)
• Hugh de Courtenay, 13th Earl of Devon (1389-1422)
• Thomas de Courtenay, 14th Earl of Devon (1414-1458)
• Thomas Courtenay, 15th Earl of Devon (1432-1461) (attainted 1461)
• John Courtenay, 16th Earl of Devon (1435-1471) (restored 1470; forfeited 1471)

Earl of Devon, Second Creation (1469)

• Humphrey Stafford, 1st Earl of Devon (1439-1469) (restored May 1469; forfeited August 1469)

Earl of Devon, Third Creation (1485)

• Edward Courtenay, 1st Earl of Devon (d. 1509) (attainted 1484; created 1485; restored 1485; forfeited 1509 by son’s attainder)

Earls of Devon, Fourth Creation (1511)

• William Courtenay, 1st Earl of Devon (1475-1511) (attainted 1504; restored 1511; died before investiture)
• Henry Courtenay, 1st Marquess of Exeter, 2nd Earl of Devon (1498-1539) (attainted 1538)

Earls of Devon, Fifth Creation (1553)

• Edward Courtenay, 1st Earl of Devon (1527-1556) (restored 1553; dormant 1556†)
• William Courtenay, 2nd Earl of Devon (d. 1557)
• William Courtenay, 3rd Earl of Devon (d. 1630)
• Francis Courtenay, 4th Earl of Devon (d. 1638)

Courtenay Baronets (1644)

• Sir William Courtenay, 5th Earl of Devon, 1st Baronet (d. 1702) (created 1644)
• Sir William Courtenay, 6th Earl of Devon, 2nd Baronet

Viscounts Courtenay (1762)

• William Courtenay, 7th Earl of Devon, 1st Viscount Courtenay (d. May 16 1762) (created 1762)
• William Courtenay, 8th Earl of Devon, 2nd Viscount Courtenay (d. 1788)

Earls of Devon, Fifth Creation, revived

• William Courtenay, 9th Earl of Devon, 3rd Viscount Courtenay (1768-1835) (retrospectively revived 1831†)
• 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, Seventh Creation (1603)

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

†: 1553 creation was with remainder to his heirs male whatsoever, so theoretically succeeded by his sixth cousin once removed; thus the 1831 revival was to the 9th member of the family with respect to said creation.