Juozas Jakštas (9 September 1900 – 31 July 1989) was a Lithuanian medieval historian, author, and docent of Vytautas Magnus University.

Jakštas was the first Lithuanian historian to propose that the Gediminids originated in Aukštaitija.

[1] Juozas Jakštas was born on 9 September 1900 in the village of Slabada in the modern-day Ukmergė district, then the Kovno Governorate of the Russian Empire.

In 1944 Jakštas fled Lithuania, and in 1949 he settled in the United States.

He worked in a factory up until his death on 31 July 1989 in Cleveland, Ohio.