Charles Henry Mills, 1st Baron Hillingdon (26 April 1830 – 3 April 1898), known from 1872 to 1886 as Sir Charles Mills, 2nd Baronet, was a British banker and Conservative politician. Hillingdon was the only son of Sir Charles Mills, 1st Baronet, and his wife Emily, daughter of Richard Henry Cox. He was a partner in the banking firm of Glyn, Mills & Co. In 1865 he entered Parliament for Northallerton, a seat he held until 1866 when he was unseated due to bribery by his agents. Later, he represented Kent West from 1868 to 1885.