| Madanthyar | |
| Other Name: | Madanthyaru, Modanthyer |
| Settlement Type: | town |
| Pushpin Map: | India Karnataka#India3 |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Karnataka, India |
| Coordinates: | 12.9505°N 75.1871°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Karnataka |
| Subdivision Type2: | District |
| Subdivision Name2: | Dakshina Kannada |
| Subdivision Type3: | Taluka |
| Subdivision Name3: | Belthangady |
| Unit Pref: | Metric |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | English, Tulu, Malayalam, Kannada, Konkani |
| Blank Info Sec1: | Dakshina Kannada |
| Blank1 Name Sec1: | Vidhana Sabha constituency |
| Blank1 Info Sec1: | Belthangady |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 574 224 |
| Area Code Type: | Telephone code |
| Registration Plate: | KA-70 |
Madanthyar is a small town located in Belthangady taluk of the Dakshina Kannada district of Karnataka state in India. It is on the route to Mangalore from Belthangady.
Madanthyar is located at 12.9505°N 75.1871°W.[1] It has an average elevation of 685 metres (2247 feet).
People from around the district visit Madanthyar to shop, particularly to buy groceries and clothing.Madanthyar is growing day by day with new infrastructure and locally owned businesses. Well known banks, such as Corporation Bank and the State Bank of India can be found in Madanthyar.
List of educational institutions around Madanthyar