Caleb Heath was born around 1815 in Northfield, New Hampshire, to Asa Heath and Polly Ingalls. His father was a farmer. The family moved to Warren, New Hampshire, sometime before 1850, and Heath eventually began work as a farmer. By 1850, he owned $600 of real estate. A decade later, he owned $6,325 of real estate and $2,950 of personal property. He married Sallie Merrill in Warren on May 12, 1867, and their son Joshua was born around 1868. By 1870, Heath owned $6,500 of real estate and $4,500 of personal property. He died of cancer in Piermont, New Hampshire, on April 2, 1889.