William H. Trump was born around 1841 in Pennsylvania. By 1860, he was working as a miller in Scott, Pennsylvania.
He enlisted in the Union army on July 8, 1861, and he mustered in as a sergeant in Battery F of the 1st Pennsylvania Light Artillery. The regiment took part in the Second Battle of Bull Run, the Battle of Antietam, the Battle of Fredericksburg, the Battle of Chancellorsville, the Battle of Gettysburg, the Overland Campaign, and the siege of Petersburg. He expressed devotion to the Union, fearing in October 1862 that “we are trifling to[o] much time away, until it will be to[to] late, and the Union not preserved.” He mustered out on June 9, 1865.
He settled in Illinois after the war, and he married Hannah Johnson on December 24, 1867. They had at least six children: Ulysses, born around 1869; Charles, born around 1870; George, born around 1872; Mary, born around 1875; Emma, born around 1879; and Clara, born around 1882. They moved to Sugarloaf, Pennsylvania, around 1869, and Trump worked as a miller there. They moved to Fishing Creek, Pennsylvania, in the 1870s, and then to Muncy Creek, Pennsylvania, in the 1880s. He died on September 12, 1902.