Zygmunt Michał Vetulani (1894–1942) was a Polish diplomat and economist.

He was a general consul of Rzeczpospolita in Kaliningrad, Baghdad and Rio de Janeiro.

He was the oldest son of Roman Vetulani and Elżbieta Kunachowicz.

His brothers were Kazimierz, Tadeusz and Adam.

In 1912 he graduated Queen Sophia high school in Sanok.