(Thea) de Roos-van Rooden (born 27 May 1949 in Hillegom) is a Dutch historian and politician[1] for the Labour Party (Partij van de Arbeid).

In 1978 she was elected as councillor for the city council of Heemskerk.

After resigning in 1997 she was the dijkgraaf of the water board "Het Lange Rond" in North Holland.

In 2009 she was elected as a member of the water board "Hoogheemraadschap Rijnland".

Besides her educational and political activities she published several books, most of them on local history.