| Isona i Conca Dellà | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Catalonia |
| Pushpin Map Caption: | Location in Catalonia |
| Coordinates: | 42.12°N 1.0481°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Lleida |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Pallars Jussà |
| Leader Title: | Mayor |
| Leader Name: | Constantí Aranda Farrero (2015)[1] |
| Area Footnotes: | [2] |
| Area Total Km2: | 139.4 |
| Elevation M: | 659 |
| Population Density Km2: | auto |
| Population Demonym: | Isonenc, isonenca |
Isona i Conca Dellà (pronounced as /ca/) is a municipality in the comarca of the Pallars Jussà in Catalonia, Spain. It is situated in the valley of the Conques river in the south-east of the comarca. It was formed in 1970 by the fusion of the following municipalities: Isona, Basturs, Benavent de la Conca, Biscarri, Conques, Covet, Gramenet, Llordà, Masos de Sant Martí, Montodó, Orcau i Figuerola d'Orcau, Sant Romà d'Abella and Siall. The town hall is in Isona. The municipality is served by the C-1412 road between Artesa de Segre and Tremp, and is linked to Coll de Nargó by the L-511. It includes a small exclave to the south.
The church of Santa Maria in Covet and Llordà castle are protected historico-artistic monuments.
The municipality of Isona and Conca Dellà is formed of fourteen villages. Populations are given as of 2005:
Populations from before 1970 are the totals of the populations of the former municipalities.
| Pop 1900: | 3522 |
| Pop 1930: | 2695 |
| Pop 1950: | 2257 |
| Pop 1970: | 1615 |
| Pop 1986: | 1502 |
| Pop Latest: | 1153 |
| Latest Year: | 2007 |