List of peers 1140–1149

Peerage of England

 * Earl of Northampton (1080)||Simon Saint-Lis, 2nd Earl of Northampton||1109||1153||
 * rowspan=2|Earl of Surrey (1088)||William de Warenne, 3rd Earl of Surrey||1138||1148||Died
 * Isabel de Warenne, 4th Countess of Surrey||1148||1199||
 * Earl of Warwick (1088)||Roger de Beaumont, 2nd Earl of Warwick||1119||1153||
 * Earl of Buckingham (1097)||Walter Giffard, 2nd Earl of Buckingham||1102||1164||
 * Earl of Leicester (1107)||Robert de Beaumont, 2nd Earl of Leicester||1118||1168||
 * Earl of Chester (1121)||Ranulph de Gernon, 2nd Earl of Chester||1129||1153||
 * Earl of York (1138)||William le Gros, 1st Earl of York||1138||1179||
 * rowspan=2|Earl of Gloucester (1121)||Robert, 1st Earl of Gloucester||1121||1147||Died
 * William Fitzrobert, 2nd Earl of Gloucester||1147||1183||
 * Earl of Hertford (1135)||Gilbert de Clare, 2nd Earl of Hertford||1136||1151||
 * rowspan=2|Earl of Richmond (1136)||Alan de Bretagne, 1st Earl of Richmond||1136||1146||Died
 * Conan IV, Duke of Brittany||1146||1171||
 * Earl of Arundel (1138)||William d'Aubigny, 1st Earl of Arundel||1138||1176||
 * Earl of Bedford (1138)||Hugh de Beaumont, 1st Earl of Bedford||1138||1142||Forfeit
 * Earl of Derby (1138)||Robert de Ferrers, 2nd Earl of Derby||1139||1162||
 * rowspan=2|Earl of Pembroke (1138)||Gilbert de Clare, 1st Earl of Pembroke||1138||1147||Died
 * Richard de Clare, 2nd Earl of Pembroke||1147||1176||
 * Earl of Worcester (1138)||Waleran de Beaumont, 1st Earl of Worcester||1138||1145||Forfeit
 * rowspan=2|Earl of Essex (1139)||Geoffrey de Mandeville, 1st Earl of Essex||1139||1144||Died
 * Geoffrey de Mandeville, 2nd Earl of Essex||1144||1160||
 * Earl of Cornwall (1140)||Alain de Bretagne, 1st Earl of Cornwall||1140||1141||New creation; Deprived
 * Earl of Norfolk (1140)||Hugh Bigod, 1st Earl of Norfolk||1140||1177||New creation
 * Earl of Cornwall (1141)||Reginald de Dunstanville, 1st Earl of Cornwall||1141||1175||New creation
 * Earl of Devon (1141)||Baldwin de Redvers, 1st Earl of Devon||1141||1155||New creation
 * rowspan=2|Earl of Hereford (1141)||Miles de Gloucester, 1st Earl of Hereford||1141||1143||New creation; Died
 * Roger Fitzmiles, 2nd Earl of Hereford||1143||1155||
 * Earl of Kent (1141)||William de Ypres, 1st Earl of Kent||1141||1155||New creation
 * Earl of Lincoln (1141)||William de Roumare, 1st Earl of Lincoln||1141||1155||New creation
 * Earl of Oxford (1142)||Aubrey de Vere, 1st Earl of Oxford||1142||1194||New creation
 * Earl of Salisbury (1145)||Patrick of Salisbury, 1st Earl of Salisbury||1145||1168||New creation
 * Earl of Lincoln (1147)||Gilbert de Gant, Earl of Lincoln||1147||1156||New creation
 * rowspan=2|Earl of Pembroke (1138)||Gilbert de Clare, 1st Earl of Pembroke||1138||1147||Died
 * Richard de Clare, 2nd Earl of Pembroke||1147||1176||
 * Earl of Worcester (1138)||Waleran de Beaumont, 1st Earl of Worcester||1138||1145||Forfeit
 * rowspan=2|Earl of Essex (1139)||Geoffrey de Mandeville, 1st Earl of Essex||1139||1144||Died
 * Geoffrey de Mandeville, 2nd Earl of Essex||1144||1160||
 * Earl of Cornwall (1140)||Alain de Bretagne, 1st Earl of Cornwall||1140||1141||New creation; Deprived
 * Earl of Norfolk (1140)||Hugh Bigod, 1st Earl of Norfolk||1140||1177||New creation
 * Earl of Cornwall (1141)||Reginald de Dunstanville, 1st Earl of Cornwall||1141||1175||New creation
 * Earl of Devon (1141)||Baldwin de Redvers, 1st Earl of Devon||1141||1155||New creation
 * rowspan=2|Earl of Hereford (1141)||Miles de Gloucester, 1st Earl of Hereford||1141||1143||New creation; Died
 * Roger Fitzmiles, 2nd Earl of Hereford||1143||1155||
 * Earl of Kent (1141)||William de Ypres, 1st Earl of Kent||1141||1155||New creation
 * Earl of Lincoln (1141)||William de Roumare, 1st Earl of Lincoln||1141||1155||New creation
 * Earl of Oxford (1142)||Aubrey de Vere, 1st Earl of Oxford||1142||1194||New creation
 * Earl of Salisbury (1145)||Patrick of Salisbury, 1st Earl of Salisbury||1145||1168||New creation
 * Earl of Lincoln (1147)||Gilbert de Gant, Earl of Lincoln||1147||1156||New creation
 * Earl of Devon (1141)||Baldwin de Redvers, 1st Earl of Devon||1141||1155||New creation
 * rowspan=2|Earl of Hereford (1141)||Miles de Gloucester, 1st Earl of Hereford||1141||1143||New creation; Died
 * Roger Fitzmiles, 2nd Earl of Hereford||1143||1155||
 * Earl of Kent (1141)||William de Ypres, 1st Earl of Kent||1141||1155||New creation
 * Earl of Lincoln (1141)||William de Roumare, 1st Earl of Lincoln||1141||1155||New creation
 * Earl of Oxford (1142)||Aubrey de Vere, 1st Earl of Oxford||1142||1194||New creation
 * Earl of Salisbury (1145)||Patrick of Salisbury, 1st Earl of Salisbury||1145||1168||New creation
 * Earl of Lincoln (1147)||Gilbert de Gant, Earl of Lincoln||1147||1156||New creation
 * Earl of Lincoln (1141)||William de Roumare, 1st Earl of Lincoln||1141||1155||New creation
 * Earl of Oxford (1142)||Aubrey de Vere, 1st Earl of Oxford||1142||1194||New creation
 * Earl of Salisbury (1145)||Patrick of Salisbury, 1st Earl of Salisbury||1145||1168||New creation
 * Earl of Lincoln (1147)||Gilbert de Gant, Earl of Lincoln||1147||1156||New creation
 * Earl of Salisbury (1145)||Patrick of Salisbury, 1st Earl of Salisbury||1145||1168||New creation
 * Earl of Lincoln (1147)||Gilbert de Gant, Earl of Lincoln||1147||1156||New creation
 * Earl of Lincoln (1147)||Gilbert de Gant, Earl of Lincoln||1147||1156||New creation

Peerage of Scotland

 * rowspan=2|Earl of Mar (1114)||Ruadrí, Earl of Mar||1115||Abt. 1140||Died
 * Morggán, Earl of Mar||Abt. 1140||Abt. 1178||
 * Earl of Dunbar (1115)||Gospatric III, Earl of Dunbar||1138||1166||
 * Earl of Angus (1115)||Gille Brigte, Earl of Angus||1135||1187||
 * Earl of Atholl (1115)||Máel Muire, Earl of Atholl||1115||Abt 1150||
 * Earl of Buchan (1115)||Colbán, Earl of Buchan||Abt. 1135||Abt. 1180||
 * rowspan=2|Earl of Strathearn (1115)||Máel Ísu I, Earl of Strathearn||1115||Abt. 1140||Died
 * Ferchar, Earl of Strathearn||Abt. 1140||1171||
 * Earl of Fife (1129)||Donnchad I, Earl of Fife||1139||1154||
 * }
 * Earl of Buchan (1115)||Colbán, Earl of Buchan||Abt. 1135||Abt. 1180||
 * rowspan=2|Earl of Strathearn (1115)||Máel Ísu I, Earl of Strathearn||1115||Abt. 1140||Died
 * Ferchar, Earl of Strathearn||Abt. 1140||1171||
 * Earl of Fife (1129)||Donnchad I, Earl of Fife||1139||1154||
 * }
 * Earl of Fife (1129)||Donnchad I, Earl of Fife||1139||1154||
 * }
 * }
 * }