Viseu Dão-Lafões is a Portuguese subregion located in the north of the Central Region. In 2021, the subregion recorded 252,984 inhabitants and a population density of 78 inhabitants per km. The subregion has an area of 3,238 km2, which can be divided into 14 municipalities and 156 parishes. The capital of the subregion is the city of Viseu, which is the largest city in the subregion and the third largest city in the Central Region, with 99,561 inhabitants in the entire municipality and 59,469 inhabitants in the urban area. It borders the Porto metropolitan area to the northwest, the Tâmega e Sousa subregion to the north, the Douro subregion to the northeast, the Beiras e Serra da Estrela subregion to the east, the Região de Coimbra subregion to the south and the Região de Aveiro subregion to the west.

The subregion consists of the following 14 municipalities:

• Aguiar da Beira
• Carregal do Sal
• Castro Daire
• Mangualde
• Nelas
• Oliveira de Frades
• Penalva do Castelo
• Santa Comba Dão
• São Pedro do Sul
• Sátão
• Tondela
• Vila Nova de Paiva
• Viseu
• Vouzela

The 2021 census shows that in the subregion the population has decreased to 252,796, compared to the year 2011, where the population was 267,728 and in 2001, where the population was 275,934. Castro Daire and Viseu are the only ones of the 14 municipalities that registered an increase, while the other 12 municipalities registered a decrease.

Municipality	Inhabitants			Area in km	Population density per km
	2001	2011	2021
Aguiar da Beira	6,247	5,473	5,231	206.7 km	25
Carregal do Sal	10,411	9,835	9,038	116.8 km	77
Castro Daire	16,990	15,339	13,736	379.0 km	36
Mangualde	20,990	19,880	18,303	219.2 km	83
Nelas	14,283	14,037	13,124	125.7 km	104
Oliveira de Frades	10,584	10,261	9,510	147.4 km	64
Penalva do Castelo	9,019	7,956	7,333	134.3 km	54
Santa Comba Dão	12,473	11,597	10,641	111.9 km	95
São Pedro do Sul	19,083	16,851	15,137	348.9 km	43
Sátão	13,144	12,444	11,026	201.9 km	54
Tondela	31,152	28,946	25,914	371.2 km	69
Vila Nova de Paia	6,141	5,176	4,662	175.5 km	26
Viseu	93,501	99,369	99,561	507.1 km	196
Vouzela	11,916	10,564	9,580	193.6 km	49
Viseu-Dão Lafões	275,934	267,728	252,796	3,238 km	78

40°39′19″N 7°54′51″W / 40.65528°N 7.91417°W / 40.65528; -7.91417