The Tuscan regional election of 1990 took place on 6 and 7 May 1990.

Election was held under proportional representation with provincial constituencies where the largest remainder method with a Droop quota was used.

To ensure more proportionality, remained votes and seats were transferred at regional level and calculated at-large.

After the election Communist Marco Marcucci formed a government comprising the Italian Socialist Party and the Italian Democratic Socialist Party.

In 1992 Vannino Chiti took over from Marcucci and the centre-right Italian Liberal Party joined the government.