Sir Josiah John Guest, 1st Baronet (2 February 1785 – 26 November 1852), known as John Josiah Guest, was a Welsh engineer, entrepreneur and politician.
- Occupation
- Q82955
- Position held
- Q41582556, Q41582555, Q41582553, Q41582550
- Citizenship
- Q174193, Q25, Q161885
- Born
- February 2, 1785
- Died
- November 26, 1852
