When Calvin Peck Pettengill was born on 21 June 1853, in Ellsworth, Hancock, Maine, United States, his father, Byron Greenleaf Pettengill, was 29 and his mother, Elizabeth Peck, was 25. He married Ella Kendall on 1 June 1876, in Oakham, Oakham, Worcester, Massachusetts, United States. They were the parents of at least 2 sons and 2 daughters. He lived in Maine, United States in 1870. He died on 18 January 1918, in Boulder, Boulder, Colorado, United States, at the age of 64, and was buried in Boulder, Boulder, Colorado, United States.