| Nanjikottai | |
| Native Name Lang: | tamil |
| Settlement Type: | town panchayat |
| Pushpin Map: | India Tamil Nadu |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 10.7453°N 79.1289°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Thanjavur |
| Unit Pref: | Metric |
| Population Total: | 32,689 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 613006[2] |
Nanjikottai is a panchayat town in Thanjavur district in the Indian state of Tamil Nadu. It is a part of the Thanjavur urban agglomeration.[3]
India census,[4] Nanjikottai had a population of 21,898. Males constitute 50% of the population and females 50%. Nanjikottai has an average literacy rate of 81%, higher than the national average of 59.5%: male literacy is 86%, and female literacy is 76%. In Nanjikottai, 9% of the population is under 6 years of age.