Sabina Catharina of East Frisia (11 August 1582 – 31 May 1618) was a Countess of Rietberg in what is now Germany.
Sabina Catharina was the eldest child of Count Enno III of East Frisia and his first wife, Countess Walburgis of Rietberg.
[1] In the Treaty of Berum of 28 January, the lands her father had inherited from her mother were divided between Sabina Catherine and her sister Agnes, because their father wanted to marry again.
On 3 March 1601, Sabina married her uncle, John III, in a ceremony officiated by Abbot Leonard Ruben of Abdinghof Abbey.
Sabina Catharina died on 31 May 1618 during the birth of her eleventh child.