Balys Gajauskas (24 February 1926 – 28 September 2017) was a Lithuanian politician.
In 1990 he was among those who signed the Act of the Re-Establishment of the State of Lithuania.
In 1978 he became a prisoner of conscience after being sentenced for "anti-Soviet agitation and propaganda" by the Supreme Court of the Lithuanian SSR.
Before that he had served a 25-year sentence for having participated in the Lithuanian anti-Soviet resistance, being released in 1973.