Subrantas Siswanto (11 April 1923 – 14 May 1980) was an Indonesian military officer who served as the governor of Riau between 1978 and 1980, and previously as the regent of Kampar Regency between 1967 and 1978.

Siswanto was born in Purworejo, today in Central Java, on 11 April 1923.

[2] During the Indonesian National Revolution, he fought the Dutch in Sumatra, and spent some time in Bengkalis.

After the revolution, he was appointed chief of staff of several military units stationed in Riau.

[4] After his time in Kampar, Siswanto was appointed as Riau's governor, and he was sworn in on 14 June 1978.