When Dan McInroe was born on 23 September 1917, in Huckabay, Erath, Texas, United States, his father, Nathan Franklin McInroe, was 26 and his mother, Helen Thornton, was 29. He married Mary Leota Hunt on 12 December 1936, in Stephenville, Erath, Texas, United States. He lived in Justice Precinct 1, Erath, Texas, United States in 1940. He died on 20 January 2009, in Snyder, Scurry, Texas, United States, at the age of 91, and was buried in Huckabay Cemetery, Huckabay, Erath, Texas, United States.