Herrick Lunn was born around 1832 in Pennsylvania to Jesse and Almira Lunn. His father was a farmer who owned $1,000 of real estate and $275 of personal property by 1860. He grew up in Windham, Pennsylvania. He married a woman named Emily in the 1850s. By 1860, he was working as a farmhand, and he owned $150 of personal property.
He enlisted in the Union army on October 24, 1862, and he mustered in as a private in Company D of the 17th Pennsylvania Cavalry four days later. He died of typhoid fever in Acquia Creek, Virginia, on March 14, 1863.