A pysanka (Ukrainian: писанка, plural: pysanky) is a Ukrainian Easter egg, decorated using a wax-resist (batik) method. The word comes from the verb pysaty, "to write", as the designs are not painted on, but written with beeswax. The word pysanka refers specifically to an egg decorated with traditional Ukrainian folk designs, and is not a generic term for any egg decorated using wax resist.

Many other eastern European ethnic groups decorate eggs using wax resist for Easter. These include the Belarusians (пісанка, pisanka), Bulgarians (писано яйце, pisano yaytse), Croats (pisanica), Czechs (kraslice), Hungarians (hímestojás), Lithuanians (margutis), Poles (pisanka), Romanians (ouă vopsite, incondeiate or impistrite), Serbs (pisanica), Slovaks (kraslica), Slovenes (pisanica, pirhi or remenke) and Sorbs (jejka pisać).

Pysanka is often taken to mean any type of decorated egg, but it specifically refers to an egg created by the written-wax batik method and utilizing traditional folk motifs and designs. Several other types of decorated eggs are seen in Ukrainian tradition, and these vary throughout the regions of Ukraine.