David Chadwick (23 December 1821 – 19 September 1895) was an English accountant and Liberal Party politician. He sat in the House of Commons from 1868 to 1880.
David Chadwick was the son of John Chadwick, who was originally from Macclesfield but later moved to Manchester.
Chadwick was educated in Manchester, and began training as an accountant in 1843. By 1870 he was a senior partner in Chadwicks, Adamson, Collier, and Co., based in London and Manchester. He was a President of the Manchester Statistical Society, the first president of the Manchester Institute of Accountants, and an associate of the Institution of Civil Engineers.
At the 1865 general election, Chadwick unsuccessfully contested the borough of Macclesfield, but he won the seat at the 1868 general election. Macclesfield then had two Members of Parliament (MPs), and Chadwick and his fellow Liberal MP William Coare Brocklehurst were re-elected in 1874 and in 1880. However, an election petition was lodged against the result of the 1880 general election in Macclesfield, and the result was declared void on 22 June 1880. The Election Court found that an organised system of bribery and treating by the Liberal election agent had prevailed at the election; Chadwick and Brocklehurst were both unseated and a Royal Commission was appointed to investigate. The inquiry opened on 1 October 1880, which found that there had been extensive bribery in the borough. The writ was suspended, and the borough lost its right to representation in Parliament. William Mair, Liberal agent at the election, told the court that he had promised Chadwick that no money would be spent illegally. He was convicted in July 1881 of bribery and of making a false return of election expenses. Chadwick did not stand again.