List of peers 1240–1249

Peerage of England

 * rowspan="2"|Earl of Surrey (1088)||William de Warenne, 5th Earl of Surrey||1199||1240||Died
 * John de Warenne, 6th Earl of Surrey||1240||1304||
 * rowspan="2"|Earl of Warwick (1088)||Thomas de Beaumont, 6th Earl of Warwick||1229||1242||Died
 * Margaret de Newburg, 7th Countess of Warwick||1242||1253||
 * Earl of Leicester (1107)||Simon de Montfort, 6th Earl of Leicester||1218||1265||
 * Earl of Gloucester (1122)||Richard de Clare, 6th Earl of Gloucester||1230||1262||5th Earl of Hertford
 * rowspan="2"|Earl of Arundel (1138)||Hugh d'Aubigny, 5th Earl of Arundel||1224||1243||Died
 * John FitzAlan, 6th Earl of Arundel||1243||1267||
 * rowspan="2"|Earl of Derby (1138)||William de Ferrers, 4th Earl of Derby||1190||1247||Died
 * William de Ferrers, 5th Earl of Derby||1247||1254||
 * Earl of Norfolk (1140)||Roger Bigod, 4th Earl of Norfolk||1225||1270||
 * rowspan="2"|Earl of Devon (1141)||Baldwin de Redvers, 6th Earl of Devon||1217||1245||Died
 * Baldwin de Redvers, 7th Earl of Devon||1245||1262||
 * Earl of Oxford (1142)||Hugh de Vere, 4th Earl of Oxford||1221||1263||
 * Earl of Salisbury (1145)||Ela of Salisbury, 3rd Countess of Salisbury||1196||1261||
 * rowspan="3"|Earl of Pembroke (1189)||Gilbert Marshal, 4th Earl of Pembroke||1234||1241||Died
 * Walter Marshal, 5th Earl of Pembroke||1241||1245||Died
 * Anselm Marshal, 6th Earl of Pembroke||1245||1245||Died, title became extinct
 * Earl of Hereford (1199)||Humphrey de Bohun, 2nd Earl of Hereford||1220||1275||1st Earl of Essex (1239)
 * Earl of Winchester (1207)||Roger de Quincy, 2nd Earl of Winchester||1219||1264||
 * Earl of Lincoln (1217)||Margaret de Quincy, Countess of Lincoln||1232||1266||
 * Earl of Cornwall (1225)||Richard, 1st Earl of Cornwall||1225||1272||
 * Earl of Kent (1227)||Hubert de Burgh, 1st Earl of Kent||1227||1243||Died, title became extinct
 * Earl of Richmond (1241)||Peter of Savoy, 1st Earl of Richmond||1241||1268||New creation
 * Earl of Pembroke (1247)||William de Valence, 1st Earl of Pembroke||1247||1296||New creation
 * Earl of Oxford (1142)||Hugh de Vere, 4th Earl of Oxford||1221||1263||
 * Earl of Salisbury (1145)||Ela of Salisbury, 3rd Countess of Salisbury||1196||1261||
 * rowspan="3"|Earl of Pembroke (1189)||Gilbert Marshal, 4th Earl of Pembroke||1234||1241||Died
 * Walter Marshal, 5th Earl of Pembroke||1241||1245||Died
 * Anselm Marshal, 6th Earl of Pembroke||1245||1245||Died, title became extinct
 * Earl of Hereford (1199)||Humphrey de Bohun, 2nd Earl of Hereford||1220||1275||1st Earl of Essex (1239)
 * Earl of Winchester (1207)||Roger de Quincy, 2nd Earl of Winchester||1219||1264||
 * Earl of Lincoln (1217)||Margaret de Quincy, Countess of Lincoln||1232||1266||
 * Earl of Cornwall (1225)||Richard, 1st Earl of Cornwall||1225||1272||
 * Earl of Kent (1227)||Hubert de Burgh, 1st Earl of Kent||1227||1243||Died, title became extinct
 * Earl of Richmond (1241)||Peter of Savoy, 1st Earl of Richmond||1241||1268||New creation
 * Earl of Pembroke (1247)||William de Valence, 1st Earl of Pembroke||1247||1296||New creation
 * Earl of Winchester (1207)||Roger de Quincy, 2nd Earl of Winchester||1219||1264||
 * Earl of Lincoln (1217)||Margaret de Quincy, Countess of Lincoln||1232||1266||
 * Earl of Cornwall (1225)||Richard, 1st Earl of Cornwall||1225||1272||
 * Earl of Kent (1227)||Hubert de Burgh, 1st Earl of Kent||1227||1243||Died, title became extinct
 * Earl of Richmond (1241)||Peter of Savoy, 1st Earl of Richmond||1241||1268||New creation
 * Earl of Pembroke (1247)||William de Valence, 1st Earl of Pembroke||1247||1296||New creation
 * Earl of Kent (1227)||Hubert de Burgh, 1st Earl of Kent||1227||1243||Died, title became extinct
 * Earl of Richmond (1241)||Peter of Savoy, 1st Earl of Richmond||1241||1268||New creation
 * Earl of Pembroke (1247)||William de Valence, 1st Earl of Pembroke||1247||1296||New creation
 * Earl of Richmond (1241)||Peter of Savoy, 1st Earl of Richmond||1241||1268||New creation
 * Earl of Pembroke (1247)||William de Valence, 1st Earl of Pembroke||1247||1296||New creation
 * Earl of Pembroke (1247)||William de Valence, 1st Earl of Pembroke||1247||1296||New creation

Peerage of Scotland

 * rowspan=2|Earl of Mar (1114)||Donnchadh, Earl of Mar||Abt. 1220||Abt. 1240||Died
 * Uilleam, Earl of Mar||Abt. 1240||1281||
 * rowspan=2|Earl of Dunbar (1115)||Patrick II, Earl of Dunbar||1232||1248||Died
 * Patrick III, Earl of Dunbar||1248||1289||
 * rowspan=3|Earl of Angus (1115)||Máel Coluim, Earl of Angus||1214||1240||Died
 * Matilda, Countess of Angus||1240||1246||Died
 * Gilbert de Umfraville, Earl of Angus||1246||1307||
 * rowspan=2|Earl of Atholl (1115)||Padraig, Earl of Atholl||Abt. 1231||1241||Died
 * Forbhlaith, Countess of Atholl||1241||Abt. 1250||
 * rowspan=2|Earl of Buchan (1115)||Margaret, Countess of Buchan||Abt. 1195||Abt. 1243||Died
 * Alexander Comyn, Earl of Buchan||Abt. 1243||1289||
 * rowspan=2|Earl of Strathearn (1115)||Robert, Earl of Strathearn||1223||1245||Died
 * Maol Íosa II, Earl of Strathearn||1245||1271||
 * Earl of Fife (1129)||Máel Coluim II, Earl of Fife||1228||1266||
 * Earl of Menteith (1160)||Isabella, Countess of Menteith||Abt. 1230||1258||
 * Earl of Lennox (1184)||Maol Domhnaich, Earl of Lennox||1220||1260||
 * Earl of Carrick (1184)||Donnchadh, Earl of Carrick||1186||1250||
 * Earl of Ross (1215)||Fearchar, Earl of Ross||1215||1251||
 * rowspan=2|Earl of Sutherland (1235)||William de Moravia, 1st Earl of Sutherland||1235||1248||Died
 * William de Moravia, 2nd Earl of Sutherland||1248||1307||
 * }
 * rowspan=2|Earl of Strathearn (1115)||Robert, Earl of Strathearn||1223||1245||Died
 * Maol Íosa II, Earl of Strathearn||1245||1271||
 * Earl of Fife (1129)||Máel Coluim II, Earl of Fife||1228||1266||
 * Earl of Menteith (1160)||Isabella, Countess of Menteith||Abt. 1230||1258||
 * Earl of Lennox (1184)||Maol Domhnaich, Earl of Lennox||1220||1260||
 * Earl of Carrick (1184)||Donnchadh, Earl of Carrick||1186||1250||
 * Earl of Ross (1215)||Fearchar, Earl of Ross||1215||1251||
 * rowspan=2|Earl of Sutherland (1235)||William de Moravia, 1st Earl of Sutherland||1235||1248||Died
 * William de Moravia, 2nd Earl of Sutherland||1248||1307||
 * }
 * Earl of Carrick (1184)||Donnchadh, Earl of Carrick||1186||1250||
 * Earl of Ross (1215)||Fearchar, Earl of Ross||1215||1251||
 * rowspan=2|Earl of Sutherland (1235)||William de Moravia, 1st Earl of Sutherland||1235||1248||Died
 * William de Moravia, 2nd Earl of Sutherland||1248||1307||
 * }
 * rowspan=2|Earl of Sutherland (1235)||William de Moravia, 1st Earl of Sutherland||1235||1248||Died
 * William de Moravia, 2nd Earl of Sutherland||1248||1307||
 * }
 * }
 * }

Peerage of Ireland

 * Earl of Ulster (1205)||Hugh de Lacy, 1st Earl of Ulster||1205||1242||Died, title extinct
 * rowspan=2|Baron Athenry (1172)||Peter de Bermingham||1218||1244||Died
 * Meyler de Bermingham||1244||1262||
 * Baron Kingsale (1223)||Patrick de Courcy, 2nd Baron Kingsale||1230||1260||
 * Baron Kerry (1223)||Thomas Fitzmaurice, 1st Baron Kerry||1223||1260||
 * }
 * Baron Kingsale (1223)||Patrick de Courcy, 2nd Baron Kingsale||1230||1260||
 * Baron Kerry (1223)||Thomas Fitzmaurice, 1st Baron Kerry||1223||1260||
 * }
 * }
 * }