In August, 1931, while coordinating a Frank Lloyd Wright travelling exhibit, Klumb married Else Schmidt, returning to the United States in November of that year.

He also designed a major exhibition of Native American Art for the Golden Gate International Exposition of 1939 in San Francisco, where he lived before relocating to Los Angeles in 1941.

[citation needed] Also in 1941, Klumb designed residential properties in the planned community of Greenbelt, Maryland, although the war prevented construction.

He left Los Angeles on February 24, 1944, and settled in San Juan, Puerto Rico, where devoted most of the rest of his life designing many buildings there.

The list of recipients for the Henry Klumb Award includes architects[5] Jesús Eduardo Amaral, Segundo Cardona, Jorge Rigau, and Andrés Mignucci.

Approximately 365 cubic feet (10,300 L) in size, the collection contains architectural drawings, photographs, models, artifacts, audiovisual material, and various textual documents.

The Architectural Drawing Series holds 578 projects intellectually organized in two sub-groups: work in the United States and in Puerto Rico before 1945 and documents from The Office of Henry Klumb.