Olszewo-Cechny [ɔlˈʂɛvɔ ˈt͡sɛxnɨ] is a village in the administrative district of Gmina Andrzejewo, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 2 kilometres (1 mi) south of Andrzejewo, 20 km (12 mi) east of Ostrów Mazowiecka, and 105 km (65 mi) north-east of Warsaw.