Świnie Oko [ˈɕfiɲɛ ˈɔkɔ] is a village in the administrative district of Gmina Piecki, within Mrągowo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 10 kilometres (6 mi) north-east of Piecki, 13 km (8 mi) south-east of Mrągowo, and 63 km (39 mi) east of the regional capital Olsztyn.