Catherine of Hanau also known as Katharina (25 January 1408 – 25 September 1460) was a German regent.
She was the eldest daughter of Reinhard II, who would become the first Count of Hanau in 1429, and Catherine of Nassau-Beilstein (d. 6 September 1459).
When she remarried in 1434, the guardianship and regency of Rieneck were taken up by her brother Reinhard III.
In 1434, Catherine married Count William II of Henneberg-Schleusingen (14 March 1415 – 8 January 1444[1] in a hunting accident).
On 15 June 1432, Catherine renounced her claim on the County of Rieneck, in exchange for 8000 guilders.