Nils Gustaf Weidel, né Johnsson (7 March 1890 – 11 December 1959) was a Swedish diplomat and gymnast who competed in the 1908 Summer Olympics.

[4] After this, he studied political economy in Germany and engaged in commercial activities, including working as the CEO of Continental Trading Company.

During this time, he conducted an in-depth study of Sweden's trade relations with the United States, Brazil, Argentina, and Chile, as well as certain European countries such as France, England, and Spain, which he traveled through.

[3] In 1921, Weidel became employed by the Swedish Ministry for Foreign Affairs as an acting vice consul.

He was then consul general in New York City from 1933 to 1935 and Sweden's envoy in Rio de Janeiro from 1936 to 1943 and in Lisbon from 1943 to 1951.