Henry was born in Dubuque, Iowa on September 10, 1878. He died on July 26, 1932 at the age of 53. Burial was in Mt. Calvary Cemetary in Dubuque, Iowa. Henry married Mary F. Gutenkauf (born September 13, 1876 - died September 30, 1950) about 1905.
They had three children. Eleanor Koester born on February 29, 1906 (She did not marry), Henry F. Koester born on September 18, 1909, married to Virginia Klauer (born May 8, 1914) and Carl V. Koester born on August 24, 1913, died February 6, 1981 - he did not marry.
