John Langhoff attended public school at Hochheim Prairie for five years, West Side school in Yoakum through the eighth grade, and graduated from Yoakum Higb School in May of 1949. He then attended Texas Lutheran College in September of 1949 through May 1951. John transferred to Texas College of Arts and Industries in Kingsville in September of1951 to pursue a Bachelors degree in Agriculture, which was conferred on 21 August 1953.
He enlisted in the 36th Division Band of the Texas National Guard on 21 September 1949 in New Braunfels. He played the bass horn in high school, and in Texas Lutheran and Texas A & I bands in addition the Guard band. He transferred to Company B, 386th Engineer Battalion of the 49th Armored Division in 1954 where he was recommended to attend and he completed Officer Candidate School in 1957 at the U.S. Army infantry School at Fort Benning, Georgia. During the winter of 1957-58 he attended the U.S. Army Engineer Officer Basic course at Fort Belvoir in Virginia. He was commissioned a second lieutenant in 1957, and promoted to first lieutenant in 1959. On 15 October 15 1961 the entire 49th Division was federalizcd into the U.S. Army for the Berlin Crisis. John served as Executive Officer, training officer, and at Fort Polk, Louisiana until 9 August 1962, he worked to get Company B, combat ready. He was later promoted to Captain and assigned as Battalion Motor officer.
John was employed by the Soil Conservation Service of the U.S. department of Agriculture in Brenham, Texas for four years, and he was employed as a sales representative with Parke, Davis & Company to call on physicians, hospitals, and pharmacies in southeast central Texas with headquarters in Brenham. He was promoted to District Sales Manager with headquarters in San Antonio and managed eleven salesmen in South Texas. In 1973, he transferred to Yoakum and assumed a sales position in thst territory until his retirement on 31 March 1992. In 1974, he started raising Brangus cattle on the family land on the Hochheim Prairie.
John and his wife Kathryn, had 2 sons and a daughter, and four grandsons.