List of counties of the Kingdom of Hungary located in Slovakia

This is a list of counties of the Kingdom of Hungary, which are fully or partially located in present-day Slovakia.

The territory of present-day Slovakia was part of the Kingdom of Hungary until 1920.

There were 20 (earlier 21) counties of the Kingdom of Hungary situated completely or partly in present-day Slovakia.

After the creation of Czechoslovakia, they continued to exist until 1922.

Most are still referred to informally.