Mitchell's first wife Fanny Rice died in 1885. He remarried to Eliza Weldon. He had a son,
Colonel Hugh Mitchell of the Royal Marines. Mitchell died on 7 December 1899, while in office as Governor of the Straits Settlements. He was buried in
St Andrew's Cathedral, Singapore, his tombstone was erected "To the glory of God and in memory of His Excellency Lieutenant Colonel Sir Charles Bullen Hugh Mitchell Royal Marine Light Infantry, G.C.M.G. Governor of the Colony who died in Singapore on 7 December 1899. This tablet is erected by the members of the Civil Service of the Straits Settlements." Marines from served as an honour guard and pallbearers for the Mitchell's funeral. ==Awards and honours==