| Aandiyur | |
| Native Name Lang: | ta |
| Settlement Type: | Village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 12.3531°N 78.5835°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Krishnagiri |
| Subdivision Type3: | Taluka |
| Subdivision Name3: | Uthangarai |
| Unit Pref: | Metric |
| Population Total: | 1403 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 635307 |
Aandiyur Uthangarai is a village in Uthangarai taluk, Krishnagiri district, Tamil Nadu, India.
In 1300 CE, Aandiyur was a forest inhabited only by Siddhars. Hence the place was called Siddha Madam, a name which over time evolved to become Aandi madam and eventually Aandiyur.
In the 2001 Indian census, Aandiyur had 1,979 inhabitants, 1,007 male and 972 female.[1] For the 2001 census Uthangarai taluk, and Aandiyur, were in Dharmapuri district, as Krishnagiri district was not formed until 2004.[2]
In the 2011 census, Aandiyur reported a decreased population of 1,403.[3]