Robert Rienaecker (d. 1916) was a British civil servant.
He was employed in Hong Kong by the Colonial Treasury and Revenue Office as a book keeper between 1846 and 1850.
He was a Freemason and was the Secretary of the Zetland Lodge in 1850.
He was a member of the Committee of the Victoria Library and Reading Room in 1850.
[1] He was appointed Colonial Treasurer of Hong Kong in 1854.