Radziszewo Stare [rad͡ʑiˈʂɛvɔ ˈstarɛ] is a village in the administrative district of Gmina Ciechanowiec, within Wysokie Mazowieckie County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 9 kilometres (6 mi) east of Ciechanowiec, 29 km (18 mi) south of Wysokie Mazowieckie, and 63 km (39 mi) south-west of the regional capital Białystok.