Oliver Ward Dimmock/Dimmick was a resident of Mansfield on October 13, 1862 when he enlisted as a Private in Co. A of the 12th Regiment Rhode Island Volunteer Infantry; he was mustered out on July 29, 1863.

He was born about 1842 in Mansfield to Alpheus and Marrilla (Spofford) Dimmock. In the 1860 U.S. census in Mansfield, he is enumerated as Ward Dimmock, an 18 year old farmer in the household of Alpheus Dimmock. Oliver Dimmock married Madie _____ about 1868 and had one son, Oliver W. Dimmock, born about 1869. The family was enumerated in Hartford in the 1870 U.S. census and his occupation was listed as “Traveling Agent”. He appears to have worked as a traveling salesman for the remainder of his life. He married second, Delia L. (Worthur) Howe on February 2, 1883 in Northampton, Massachusetts. It was the second marriage for both and his place of residence at the time of the marriage was New York City. Children include: Charles S. Dimmock, born about November 1887 and Marrilla L. Dimmock, born about July 1889. By 1900, the family was living in West Springfield, Massachusetts.

On August 27, 1896, he applied for an invalid pension, No. 1,150,456 that was granted under certificate No. 922,313.  His widow filed for a pension on December 19, 1912.

Oliver W. Dimmock died on October 7, 1912 at his home in West Springfield, Massachusetts and he is buried at the Oak Grove cemetery in Springfield, Massachusetts.