Volckmann moved to Harlingen, Texas in 1977. He was diagnosed with cancer in 1981 and died on 30 June 1982 in Iowa City, Iowa. Attending his funeral were several officials representing the Philippine government: Brigadier General Angel G. Kanapi, defense attache of the Philippine Embassy in Washington, D.C.; Mr. Nick Nor Paynor Jr., aide to General Kanapi; and Mr. Esperanto Curaming, representing the Philippine Consul General of Chicago. Also in attendance was his old comrade, Brigadier General Donald Blackburn, who was then living in McLean, Virginia. Volckmann is buried in his family's plot at Springdale Cemetery in Clinton, Iowa.
