Sir Philip Henry (or Heinrich) Manson-Bahr, MA Cantab, MB BChir, MD, MRCP, FRCP (born Philip Henry Bahr, 26 November 1881 – 19 November 1966) was an English zoologist and physician known for his contributions to tropical medicine.
He changed his birth name to Manson-Bahr after marrying Edith Margaret Manson, daughter of the doyen of tropical medicine Sir Patrick Manson.
Following his father-in-law, he devoted much of his career to tropical medicine.
He was a Consulting Physician, and held high offices at the London School of Hygiene & Tropical Medicine and at the London Hospital.