Jyväskylä is a city in Finland and the regional capital of Central Finland. It is located in the Finnish Lakeland. The population of Jyväskylä is app…Jyväskylä is a city in Finland and the regional capital of Central Finland. It is located in the Finnish Lakeland. The population of Jyväskylä is approximately 149,000, while the sub-region has a population of approximately 193,000. It is Finland's 7th most populous municipality, and fifth most populous urban area.