Philip J. Higgins (born 1926, died March 25, 2015) was a British mathematician, who worked in areas of algebra and algebraic topology. He is well known for his book
P. J. Higgins, Categories and groupoids, Repr. Theory Appl. Categ., 1 – 178 (electronic), ISSN 1201-561X, reprint of the 1971 original Notes on categories and groupoids, (Van Nostrand Reinhold, London; MR0327946) with a new preface by the author.