Darwin C. Pavey was born on December 10, 1845, in Rome, New York, to A. A. Pavey. His father was a fancy goods merchant who owned $1,700 of real estate and $4,000 of personal property by 1860. He grew up and attended school in Rome, and by the early 1860s, he was working as a reporter.
He enlisted in the Union army on December 28, 1864, and he mustered in as a private in Company L of the 15th New York Engineers later that day. According to his service records, he was 6 feet tall, with brown hair and blue eyes. The regiment helped capture Fort Fisher and Wilmington, North Carolina, and it took part in the Appomattox campaign. He mustered out on June 13, 1865.
Pavey moved to Wisconsin after the war, and he married Mary Kellogg around 1868. They had ten children, including Anna, who was born around 1869. They returned to Rome around 1870. Pavey worked as an editor, and by 1870, he owned $200 of personal property. He got divorced by the early 1890s, and he married Annie Estelle Smart in Portsmouth, New Hampshire, on April 2, 1893.
He applied for a federal pension in March 1895 and eventually secured one. By 1900, they were living in Somerville, Massachusetts, and Pavey was working as a publisher. He was a leader of his local Grand Army of the Republic post, and he was reportedly a “well-known Civil War veteran and lecturer on patriotic subjects.” His health deteriorated in the late 1910s, and he died of heart failure in Somerville on December 20, 1919.