Juuka is a municipality of Finland.
It is located in the province of Eastern Finland and is part of the North Karelia region. The municipality has a population of and covers an area of of which is water. The population density is .
The municipality is unilingually Finnish.
River Vaikkojoki (more than 60 km) goes from Lake Vaikkojärvi to Lake Rikkavesi, which is in Kaavi.