Šemša (Hungarian: Semse) is a village and municipality in Košice-okolie District in the Kosice Region of eastern Slovakia.

In historical records the village was first mentioned in 1280 when it belonged to Ruszkay lords of Abaúj County in the Kingdom of Hungary.

In 1322 it was bought by the castle lord Thomas from Szepes County, who originated the noble family Semsey (“of Šemša”).

in 1324 a sector of the village (known as Ižipova Šemša) newly belonged to Ruszkay family.

The municipality lies at an altitude of 330 metres and covers an area of 17.168 km2.