Lesia is a feminine given name and a Ukrainian diminutive form of the first names Larissa or Olesya. Notable people with the name include:
Lesia Dychko (born 1939), Ukrainian music educator and composer Lesia Liss (born 1966), American politician Lesia Tsurenko (born 1989), Ukrainian tennis player Lesia Valadzenkava (born 1991), Belarusian ice dancer Lesia Vasylenko (born 1987), Ukrainian lawyer and politician
Other uses: Lesia, a genus of plants in the family Gesneriaceae LESIA, a French space and astrophysics instrumentation research laboratory