Matiaszówka [matjaˈʂufka] is a village in the administrative district of Gmina Tuczna, within Biała Podlaska County, Lublin Voivodeship, in eastern Poland. It lies approximately 8 kilometres (5 mi) south of Tuczna, 34 km (21 mi) south-east of Biała Podlaska, and 89 km (55 mi) north-east of the regional capital Lublin.