Following his death, Johnston was commemorated in several ways, including a memorial fund established in his name at the University of Washington to fund graduate-level research.
بعد وفاته، احتفل بجونستون بعدة طرق، بما في ذلك إنشاء صندوق تذكاري باسمه في جامعة واشنطن لتمويل البحوث على مستوى الدراسات العليا.