Marie Therese Tehan (née O'Brien; 19 June 1940 – 31 October 2004) was an Australian politician and lawyer.

Educated at Sacré Cœur School, Glen Iris, Melbourne and at the University of Melbourne, Marie O'Brien qualified as a lawyer.

She married James "Jim" Tehan in 1963 and settled in regional Victoria.

Representing the Liberal Party, Tehan served in both houses of the Victorian Parliament.

[2] Tehan died on 31 October 2004, at Nagambie, Victoria, aged 64, due to Creutzfeldt-Jakob disease (CJD).