Thiruvallur is Taluka (Tehsil) in Tiruvallur district of Tamil Nadu state. Thiruvallur has 8 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 602021 | Ikkadu PIN Code | Tiruvallur | Thiruvallur | Sub Office |
| 602002 | Illupur PIN Code | Tiruvallur | Thiruvallur | Branch Office |
| 631203 | Kaivandur PIN Code | Tiruvallur | Thiruvallur | Branch Office |
| 602025 | Kalambakkam PIN Code | Tiruvallur | Thiruvallur | Branch Office |
| 602001 | Nggo Colony Tiruvallur PIN Code | Tiruvallur | Thiruvallur | Sub Office |
| 602105 | Thodukadu PIN Code | Tiruvallur | Thiruvallur | Branch Office |
| 602001 | Tiruvallur Nethaji Road PIN Code | Tiruvallur | Thiruvallur | Sub Office |
| 602105 | Ulundai PIN Code | Tiruvallur | Thiruvallur | Branch Office |