David Stanway was born on February 16, 1837, in England. He immigrated to America around 1857 and settled in Ypsilanti, Michigan.
He enlisted in the Union army on July 5, 1861, and he mustered in as a sergeant in Company A of the 1st Michigan Infantry on July 13. The regiment took part in the Peninsula campaign, the Second Battle of Manassas, the Battle of Antietam, the Battle of Fredericksburg, the Battle of Chancellorsville, the Battle of Gettysburg, and the Battle of the Wilderness. He was promoted to 2nd lieutenant in August 1862, to 1st lieutenant in March 1863, and to captain in January 1864. He was severely wounded in the left elbow at the Wilderness on May 5, 1864, and he mustered out on October 4, 1864.
He applied for a federal pension in October 1864 and eventually received one. He married Maria Peach around 1865, and they had at least four children: Gracie, born around 1867; Evaline, born around 1869; Minnie, born around 1869; and Perry, born around 1874. They moved to Pilot Grove, Missouri, in the 1860s, and he worked as a farmer. By 1870, he owned $3,500 of real estate and $560 of personal property. They moved to Glencoe, Kansas, in the 1870s before returning to Pilot Grove in the 1880s. By 1900, he was living in Warrensburg, Missouri. He died in Seattle, Washington, on September 18, 1908.