Wesołowo [vɛsɔˈwɔvɔ] is a village in the administrative district of Gmina Szypliszki, within Suwałki County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Lithuania. It lies approximately 7 kilometres (4 mi) south-east of Szypliszki, 21 km (13 mi) north-east of Suwałki, and 123 km (76 mi) north of the regional capital Białystok.