List of social democratic and democratic socialist parties that have governed

This is a list of social democratic and democratic socialist parties which have governed countries, whether as the ruling party or as a member of a governing coalition. Most of these parties were members of the Socialist International.

Currently represented
The following is a list of democratic socialist or partially democratic socialist parties which are currently being represented in the legislature of their country. It does not include democratic socialist parties that are mainly social democratic and are considered to their right within the centre-left.
 * Parties which are also social democratic.
 * Parties which are also social democratic.