Michael P. Gibbs, (March 25, 1870 – November 7, 1944) was a Newfoundland lawyer and politician who served as the second mayor of St. John's.
Born on March 25, 1870 in St. John's, Newfoundland, the son of John Gibbs and Marguerite Murray, he was educated at the Christian Brothers School in St. John's, and articled in law with the Hon. Michael H. Carty. Gibbs was called to the bar in 1896, and created King's Counsel in 1911. In 1898, he married Barbara Mary Eadie. Gibbs established a Tenant's League in 1892 in an attempt to have land courts established, and became in 1893 editor of the Terra Nova Advocate. He was elected as a Conservative in St. George's district in 1897, in his second attempt at a seat in the House of Assembly. He was defeated in four subsequent general elections, however, contesting a variety of districts.
While a member for St. George's (1897–1900) Gibbs established a reputation as an advocate of trade unionism and as a skilled negotiator on behalf of labour. He was instrumental in launching the Longshoremen's Protective Union (LSPU) in 1903 and remained LSPU counsel until his death. Gibbs also helped St. John's bakers and carpenters to organize, and he became Mayor of St. John's in 1906 as a Labour candidate.