| Belmannu | |
| Other Name: | Belman |
| Settlement Type: | town |
| Pushpin Map: | India Karnataka |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Karnataka, India |
| Coordinates: | 13.1667°N 126°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Karnataka |
| Subdivision Type2: | District |
| Subdivision Name2: | Udupi |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Kannada |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 576111 |
| Area Code Type: | Telephone code |
| Area Code: | +918258 |
| Blank1 Name Sec1: | Nearest city |
| Blank1 Info Sec1: | Udupi |
| Blank2 Name Sec1: | Literacy |
| Blank2 Info Sec1: | 100% |
| Blank3 Name Sec1: | Lok Sabha constituency |
| Blank3 Info Sec1: | Udupi Chikmagalur |
| Blank4 Name Sec1: | Vidhan Sabha constituency |
| Blank4 Info Sec1: | Karkala |
Belmannu, also called Belman, is a small town in Karkala taluk of Udupi district.
The place derived its name from the Kannada word Bellimannu which means silver (belli) soil (mannu).
Belmannu is famous for Shree Durga Parameshwari Temple, which is said to be built before 7th century AD. The oldest Kannada copper plate inscription was found under the foundation of this temple in 1952. The plate states that certain rights were given to the Belmannu Village Council which functioned from the Temple and probably looked after the functioning of the temple. As the inscription dates back to 8th century AD, the temple is believed to be older than the inscription.
Belmannu's St. Joseph Church was founded in 1896. It was formerly a part of the Roman Catholic Diocese of Mangalore but was shifted to the Roman Catholic Diocese of Udupi.
Belmannu is situated along the state highway connecting Padubidri and Kudremukh about 15 km from Padubidri.
Belmannu is the junction for the road that leads to Udupi via Shirva.
The population of Belmannu is predominantly Hindu. However, there is a sizable Christian population.
The village has two junior colleges and three St. Joseph Church administered schools. St. Joseph Higher Primary School and St. Joseph High School are Kannada medium schools based on the Karnataka State syllabus and St. Joseph English Medium School is an English medium school.
Nitte Engineering college is just 9 km away from Belmannu. Belmannu is well connected to its nearby cities; Mangalore, Udupi and Belmannu form a virtual triangle, with these three cities being the vertices. Udupi and Belman are 31.7 km apart and Mangalore and Belman are 36.1 km apart..