Edmund Dinis was born on October 4th, 1924 in St. Michaels, Azores to Jacinto Dinis and Maria Dinis. The family emigrated to the United States, settling in New Bedford. Jacinto Dinis served in the Massachusetts House of Representatives for more than 20 years.
A graduate of New Bedford High School, he went on to attend the University of Chicago to study law. He served for a short time in the military during World War II as a French interpreter in the 100th infantry division. Afterward, Dinis continued his studies at the Harvard University Graduate School and then at the Suffolk University Law School, where he obtained his law degree in 1950.
Dinis was politically active in the south coast region of Massachusetts, serving in the House of Representatives in 1948, the State Senate in 1953, and the New Bedford City Council in 1975. In 1959 he was was elected district attorney for the Southern District of Massachusetts.
Dinis left office in 1970, and went on to pursue other projects such as the establishment of the Dighton Rock memorial, Peter Francisco Day and the memorial for Portuguese navigator Estevan Gomez in Bangor, Maine.
Dinis passed away on March 14th, 2010 in Dartmouth, Massachusetts.