He was born on April 18, 1898, in Canastota, Madison County, New York, the son Patrick F. Milmoe (died 1918) and Margaret M. Milmoe.
On July 6, 1927, he married Frances Veronica Tobin,[2] and they had two children.
Milmoe was a member of the New York State Assembly (Madison Co.) in 1934, 1935, 1936, 1937, 1938, 1939–40, 1941–42, 1943–44, 1945–46, 1947–48, 1949–50 and 1951–52.
He was an alternate delegate to the 1956 Republican National Convention.
He died on April 8, 1972, in Oneida City Hospital in Oneida, New York;[3] and was buried at St. Agatha's Cemetery in Canastota.