Kacwin [ˈkat͡sfin] (Slovak: Kacvín) is a village in the administrative district of Gmina Łapsze Niżne, within Nowy Targ County, Lesser Poland Voivodeship, in southern Poland, close to the border with Slovakia. It lies approximately 5 kilometres (3 mi) south-east of Łapsze Niżne, 23 km (14 mi) south-east of Nowy Targ, and 81 km (50 mi) south of the regional capital Kraków.

It is one of the 14 villages in the Polish part of the historical region of Spiš (Polish: Spisz).