1938 International Lawn Tennis Challenge

The 1938 International Lawn Tennis Challenge was the 33rd edition of what is now known as the Davis Cup. 21 teams would enter the Europe Zone, while four would enter the Americas Zone.

Australia defeated Japan in the Americas Zone and Germany in the Inter-Zonal play-off. The United States would defeat the Aussies in the Challenge Round. The final was played at the Germantown Cricket Club in Philadelphia, PA, United States on 3–5 September.