Christopher Grigg was born in April 1821, in North Carolina to Burrell and Melinda Grigg. His father was a farmer who owned $250 of real estate in 1850. He may have grown up in Cleveland County, North Carolina. He married Elizabeth Beam, and they had at least three children: Agnes, born around 1847; Caleb, born around 1851; and Marietta Hester, born around 1861.
They lived in Cleveland County, and Grigg worked as a farmer. By 1850, they owned $150 of real estate. They moved to De Kalb County, Alabama, sometime in the 1850s, and by 1860, he was working as a teacher. They probably moved to Marshall County, Alabama, in the early 1860s.
He enlisted in the Confederate army on July 1, 1863, and he mustered in as a private in Company H of the 7th Alabama Cavalry later that day. According to his service records, he was 5 feet, 6 inches tall, with black hair and blue eyes. He was captured at some point during the war, and he swore an oath of allegiance to the Union in Rock Island Barracks in Illinois on May 19, 1865.
He returned to Marshall County after the war and earned a living as a farmer. By 1870, he owned $800 of real estate and $563 of personal property, and he employed at least one Black farm laborer. He died in Alabama in April 1881.