John Lancaster
John Lancaster may refer to:
- John de Lancaster (MP), Member of Parliament for Lancashire in 1316
- John Lancaster (died 1424), MP for Suffolk and Norfolk
- John Lancaster (died 1434), MP for Cumberland and Westmorland
- John Lancaster (bishop), 17th-century Anglican Bishop of Waterford and Lismore in Ireland
- John Lancaster (MP), MP for Wigan
- John Lancaster (writer), British poet and writer
- John L. Lancaster, President of the Texas and Pacific Railroad during the first half of the 20th century
- John Lancaster (Royal Navy officer)