When Adolph Knopp was born on 17 May 1909, in Lincoln, Lancaster, Nebraska, United States, his father, Henry Knopp, was 24 and his mother, Maria Catharina Hartung, was 23. He married Leopoldina Schnabel on 4 April 1929, in Minidoka, Idaho, United States. They were the parents of at least 1 son. He lived in Minidoka, Idaho, United States in 1935 and Rupert Election Precinct 3, Minidoka, Idaho, United States in 1940. He died on 22 January 1988, in Paul, Minidoka, Idaho, United States, at the age of 78, and was buried in Paul, Minidoka, Idaho, United States.