Sir Sylvanus Percival Vivian CB (October 1, 1880 in London – 1958) was the 7th Registrar General of England and Wales (1921–1945).
He was the longest serving Registrar General after George Graham.
[1] Vivian was responsible for organising the censuses in England and Wales in 1921 and 1931.
[2] He oversaw National Registration which was introduced in 1939 and ended up replacing the normally decennial census due in 1941.
Vivian was appointed a Companion of the Order of the Bath (CB) in June 1925,[3] and received a knighthood in May 1937.