| Yellanahalli | |
| Settlement Type: | village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 11.4045°N 76.7128°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | The Nilgiris |
| Governing Body: | Udagamandalam Municipality Corporation |
| Unit Pref: | Metric |
| Elevation Footnotes: | [1] |
| Elevation M: | 2400 |
| 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: | 643 243 |
| Area Code Type: | Telephone code |
| Area Code: | 91423 |
| Registration Plate: | TN 43 |
| Blank1 Name Sec1: | Civic agency |
| Blank1 Info Sec1: | Udagamandalam Municipality Corporation |
| Blank1 Name Sec2: | Climate |
| Blank1 Info Sec2: | Tropical wet (Köppen) |
| Blank2 Name Sec2: | Precipitation |
| Blank2 Info Sec2: | 1237mm |
| Blank3 Name Sec2: | Avg. annual temperature |
| Blank3 Info Sec2: | 20°C |
| Footnotes: | Temperature from Batchmates.com[2] |
Yellanahalli is a small town located in the Nilgiris District of Tamil Nadu State, Southern India and is a Revenue Village of Coonoor taluk. It is 10 km beyond Coonoor and 8 km before Ooty on the Coonoor-Ooty NH 67. It houses the Needle Industries India the manufacturers of the internationally branded ‘Pony Needles’.[3] Near Yellanahalli are another two villages called Ketti and Aruvankadu. The Ketti Valley is located to the south-west of Yellanahalli and is also sometimes referred to as the Switzerland of Southern India due to the year-round climatic conditions which do not fall into any extremes, during summer and winter.[4]