| Joseph G. Maddock, Esq. | |
| Term Start: | 1900 |
| Term End: | 1909 |
| Premier: | |
| Birth Name: | Joseph Guy Maddock |
| Birth Date: | 28 October 1862 |
| Birth Place: | Carbonear, Colony of Newfoundland |
| Death Place: | Carbonear, Dominion of Newfoundland |
| Spouse: | Emily Louisa Bemister |
| Occupation: | Politician, Businessman |
Joseph Guy Maddock, Esq. (1862 - 1942) was a Newfoundland politician and businessman from Carbonear, who represented Carbonear in the Newfoundland House of Assembly from 1900 to 1909.[1]
Maddock was born in Carbonear in 1862. He was the eldest son of Robert Maddock. His father was the owner of a merchant firm, J. & R. Maddock, located in Carbonear. Once Maddock finished schooling, he and his brother, John, took over the firm and renamed it J. & J. Maddock.[2]
In 1900, Maddock was selected as the Liberal Party candidate for Carbonear and was elected to the Newfoundland House of Assembly shortly after. He was re-elected again in 1904.
Maddock died at Carbonear in 1942.