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. See History of Slovakia.

Counties that are completely incorporated in Slovakia
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.