John Edward Campbell (27 May 1862, Lisburn, Ireland – 1 October 1924, Oxford, Oxfordshire, England) was a mathematician, best known for his contribution to the Baker-Campbell-Hausdorff formula.

He then won a scholarship to study at the Oxford University, at Hertford College.

[2] Campbell was noted as a charming and highly devoted teacher and a proponent of women's education.

[3] Campbell made his most notable contribution to mathematics in 1897 by introducing a formula for multiplication of exponentials in Lie algebras.

[3] Campbell married Sarah Hardman (born in Oldham ca.