Nicomedes I was a king of Bithynia, a region in northwestern Anatolia, during the 2nd century BCE. He is known for his efforts to expand his kingdom and strengthen its political influence. Nicomedes I established alliances with neighboring states and played a significant role in the conflicts between the Roman Republic and other regional powers. He is also recognized for founding the city of Nicomedia, which became an important cultural and economic center. His reign marked a period of relative stability and growth for Bithynia, setting the stage for future developments in the region.