Ingbert Mathiassen (full name: Ingbert Timotheus Sara Mathiassen) is a Kazulian politician and the leader of the Folkepartiet in the Kazulian Storting, following his high-profile defection to that party in 3894. Noted as being young and ambitious, Mathiassen started his political career as a member of Selucdemokraterne, but alongside two colleagues, known as the "Gang of Three", joined Hans-Peder Juel's new centrist party after its founding, citing concern over the lack of a centrist Hosian Democratic voice in politics.