Ukna is a village in Västervik Municipality, in Kalmar County, Sweden. Ukna lies at 64 m above sea level. It has 91 inhabitants. The nearest city is Västervik, 40 km to the southeast. Among the landmarks around are Ukna Church (0.4 km), Gärdserums kyrka (13.6 km) and Västra Eds kyrka (10.8 km).