| Konthagai | |
| Settlement Type: | village |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 9.8441°N 78.1842°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Thanjavur |
| Subdivision Type3: | Taluk |
| Subdivision Name3: | Papanasam |
| Leader Title: | Panchayat President |
| Unit Pref: | Metric |
| Population Total: | 507 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 630611 |
Konthagai is a village in the Papanasam taluk of Thanjavur district, Tamil Nadu, India.
As per the 2001 census, Konthagai had a total population of 507 with 245 males and 262 females. The sex ratio was 1069. The literacy rate was 64.8.