| Bláskógabyggð | |
| Settlement Type: | Municipality |
| Mapsize: | 250px |
| Pushpin Map: | Iceland |
| Coordinates: | 64.2764°N -20.4009°W |
| Subdivision Type: | Country |
| Subdivision Name: | Iceland |
| Subdivision Type1: | Region |
| Subdivision Name1: | Southern Region |
| Subdivision Type2: | Constituency |
| Subdivision Name2: | South Constituency |
| Established Title: | Established |
| Established Date: | 9 June 2002 |
| Leader Title1: | Manager |
| Leader Name1: | Valtýr Valtýsson |
| Unit Pref: | Metric |
| Area Total Km2: | 3,300 |
| Population Total: | 931 |
| Population Density Km2: | 0.28 |
| Postal Code Type: | Postal code(s) |
| Postal Code: | 840 |
| Code1 Name: | Municipal number |
| Code1 Info: | 8721 |
Bláskógabyggð (in Icelandic pronounced as /ˈplauːˌskouː(ɣ)aˌpɪɣθ/) is a municipality located in Iceland's Southern Region. Its major settlements are Laugarás in Icelandic pronounced as /ˈlœyːɣarˌauːs/ and Laugarvatn. The municipality was formed in 2002 after the merger of Laugardalshreppur, Biskupstungnahreppur and Þingvallahreppur. Within the area of the municipality lies an enclave of another municipality, Grímsnes- og Grafningshreppur.