Sir Spenser Buckingham St. John (22 December 1825 – 3 January 1910) was British Consul in Brunei in the mid 19th century.
- Occupation
- explorer, diplomat, writer
- Position held
- ambassador of the United Kingdom to Mexico, ambassador of the United Kingdom to Sweden, ambassador of the United Kingdom to Peru, ambassador of the United Kingdom to Haiti
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- December 22, 1825
- Died
- January 2, 1910, January 3, 1910