Alexander Robert Johnston, FRS[a] (formerly Campbell-Johnston, 14 June 1812 – 21 January 1888) was a British colonial official who served twice as Acting Administrator of Hong Kong from 1841 to 1842.

[5] He remained in the Mauritius civil service until 1833,[5] when he returned to England after economic conditions in the colony forced him to leave his post.

[7] On 22 June, when Elliot prepared to join the British expeditionary force in the north during the war, he appointed Johnston as acting Administrator of Hong Kong.

[8][9] Acting on Elliot's policy of encouraging a growing settlement, Johnston disposed land lots for development, which he classified into marine, town, and suburban.

[11] Historian Frank Welsh wrote, "He got few thanks for it, then or later, but it is largely due to Johnston's initiative that Hong Kong was allowed to develop".

Such conditions helped the Colonial Office be aware of the importance of establishing full control of law and order, and the danger of allowing the Chinese to share this responsibility.

[10][14] After Pottinger became the first Governor of Hong Kong on 26 June 1843, he appointed Johnston as a member of the Executive and Legislative Councils on 21 August.

[16] In June 1846, Johnston was made a member of the Executive Council in place of Colonial Secretary Frederick Wright-Bruce who went on leave before being appointed Lieutenant-Governor of Newfoundland.

Street's design was based on Holmbury St Mary's Church in Surrey and later modified by architect Ernest Coxhead in Los Angeles.