 He was awarded honorary degrees from Pennsylvania Military College (Doctor of Science) in 1940 and Grove City College in 1943.In 1967, the Catalysis Society of North America created the Houdry Award in Applied Catalysis, which is given in odd numbered years, "recognize and encourage individual contributions in the field of catalysis".On April 13, 1996, Houdry's work was recognized by the designation of a National Historic Chemical Landmark by the American Chemical Society at the site of the Sun Company (now Sunoco Logistics Partners L.P.) in Marcus Hook, Pennsylvania.