Mathew Jansen Batsiua (born 27 May 1971[1]) is a Nauruan politician.

He was Minister of Finance in the cabinet of Marcus Stephen from July 2011[4] to November 2011.

He was appointed as Minister Assisting the President of Nauru in the short-lived cabinet of Frederick Pitcher in November 2011.

[5] In 2014, Batsiua along with other opposition MPs were suspended from their parliament seats.

[7] Batsiua was arrested, and 18 other people in total were charged, dubbed the Nauru 19.