Tadeusz Bielecki (born January 30, 1901 in Slupia - February 5, 1982 in London) was a Polish politician and writer.
Personal secretary to Roman Dmowski, member of the National Party (Stronnictwo Narodowe) and Camp of Great Poland (Obóz Wielkiej Polski); he was however opposed to radicals from National Radical Camp (Obóz Narodowo-Radykalny).
He fought in the Polish September Campaign, then escaped occupied Poland to join the National Council of Poland.
He was a vocal opponent of Wladyslaw Sikorski's policies in the Polish government in exile.
After the war he remained in emigration, where he was a member of the Political Council and the Council of National Unity.