Sir William John Thompson (May 1861 – 9 June 1929) was a physician who became Registrar General for Ireland from 1909 to 1926.
He was born in Tattyreagh, County Tyrone to farmer William Thompson, in May 1861.
[2] Thompson was appointed house physician in St Vincent's Hospital, Dublin in 1895.
[2] He was elected demonstrator of anatomy at the RCSI, and later was appointed visiting and then senior physician to Jervis Street Hospital.
[3] Thompson was in this office during the Spanish flu epidemic, and noted that the Irish deaths attributed to it were conservative.