| Treklyano Municipality | |
| Native Name: | Община Трекляно |
| Settlement Type: | Municipality |
| Pushpin Map: | Bulgaria |
| Pushpin Label: | Treklyano |
| Subdivision Type: | Country |
| Subdivision Name: | Bulgaria |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kyustendil |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Treklyano |
| Leader Title: | Mayor |
| Area Total Km2: | 257.83 |
| Population Total: | 629 |
| Population As Of: | 1-Feb-2011 |
| Population Density Km2: | auto |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 42.55°N 58°W |
Treklyano Municipality (Bulgarian: Община Трекляно, trl Obština Trekljano) is a municipality in Kyustendil Province, Bulgaria. The administrative centre is Treklyano.
According to the 2021 Census, the municipality of Treklyano has only 434 inhabitants living in 19 small villages. This makes Treklyano the smallest municipality in entire Bulgaria.
According to the latest Bulgarian census of 2011, the religious composition, among those who answered the optional question on religious identification, was the following: