is a city located in Fukui Prefecture, Japan. , the city has an estimated population of 20,653 in 7,971 households, and a population density of 81 persons per km<sup>2</sup>. The total area of the city was . Katsuyama was the ninth-best ranking city in a ranking that compared health and sanitation in cities around the world published in April 2007.
Katsuyama is located in the Katsuyama Basin of far northern Fukui Prefecture, bordered by Ishikawa Prefecture to the north, and surrounded by mountains on all sides. The Kuzuryà « River flows through part of the city. Parts of the city are within the borders of Hakusan National Park.
Fukui Prefecture
Katsuyama has a Humid climate (Cfa per the Köppen climate classification system) characterized by warm, wet summers and cold winters with heavy snowfall. The average annual temperature in Katsuyama is . The average annual rainfall is with July as the wettest month. The temperatures are highest on average in August, at around , and lowest in January, at around .
Per Japanese census data, the population of Katsuyama has been declining over the past 50 years.
Katsuyama is part of ancient Echizen Province. During the Sengoku period, Katsuyama Castle was the stronghold of Shibata Katsuyasu, a relative of Shibata Katsuie. During the Edo period, the area was divided between the holdings of Echizen-Katsuyama Domain, Fukui Domain, à Âno Domain, and Gujà  Domain. Following the Meiji restoration, it was organised into part of à Âno District in Fukui Prefecture. With the establishment of the modern municipalities system on April 1, 1889, the town of Katsuyama was established. It annexed the village of Inose on April 15, 1931, On September 1, 1954, Katsuyama merged with the villages of Arado, Muraoka, Kitago, Kitadani, Shikadani, Osoha, Heisenji and Nomuki to form the city of Katsuyama.
Katsuyama has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 16 members. Katsuyama contributes one member to the Fukui Prefectural Assembly. In terms of national politics, the city is part of the Fukui 1st district of the lower house of the Diet of Japan.
From the Meiji period, the main industry of Katsuyama has been textiles, and the industry still plays a prominent role in the local economy. Agriculture and tourism are also thriving.
Katsuyama has nine public elementary schools and three middle schools operated by the city government, and one combined private elementary/middle school. The city has one public high school operated by the Fukui Prefectural Board of Education. The prefecture also operates one special education school for the handicapped.Fukui Prefectural University opened a branch campus in Katsuyama in 2026.
Echizen Railway Katsuyama Eiheiji Line