Sister cities (also called twin towns) are formal partnerships between cities in different countries.

• Partnerships are established by municipal governments and vary widely in practice - some are active cultural exchanges, many are symbolic.
• The count here reflects Wikidata P190 relationships, which may lag behind formal declarations or cancellations.
• In each round, pick the city with more sister city partnerships, or SAME when the counts match.

Sister city counts measure diplomatic activity, not friendship.