| Tehsil Name | Total Households | Number of SC Households | % of SC Households | Number of ST Households | % of ST Households | Number of Others Households | % of Others Households | Number of No Caste & Tribe Households | % No Caste & Tribe Households |
|---|---|---|---|---|---|---|---|---|---|
| All India Total | 179787454 | 33164085 | 18.45% | 19737399 | 10.98% | 123161662 | 68.5% | 3679958 | 2.05% |
| State Total | 10088119 | 2577454 | 25.55% | 182999 | 1.81% | 7315714 | 72.52% | 10196 | 0.1% |
| District Total | 368152 | 129069 | 35.06% | 9885 | 2.69% | 228419 | 62.04% | 716 | 0.19% |
| Gummidipoondi (001) | 40031 | 12418 | 31.02% | 1312 | 3.28% | 25950 | 64.82% | 345 | 0.86% |
| Ponneri (002) | 72884 | 27666 | 37.96% | 1824 | 2.5% | 43293 | 59.4% | 51 | 0.07% |
| Uthukkottai (003) | 35118 | 13040 | 37.13% | 1563 | 4.45% | 20481 | 58.32% | 34 | 0.1% |
| Tiruttani (004) | 39411 | 12827 | 32.55% | 1622 | 4.12% | 24942 | 63.29% | 20 | 0.05% |
| Pallipattu (005) | 41969 | 10755 | 25.63% | 1153 | 2.75% | 30054 | 71.61% | 7 | 0.02% |
| Thiruvallur (006) | 81097 | 33016 | 40.71% | 1859 | 2.29% | 46150 | 56.91% | 65 | 0.08% |
| Poonamallee (007) | 27785 | 11143 | 40.1% | 299 | 1.08% | 16223 | 58.39% | 120 | 0.43% |
| Ambattur (008) | 24162 | 5255 | 21.75% | 234 | 0.97% | 18604 | 77% | 69 | 0.29% |
| Mathavaram (009) | 5695 | 2949 | 51.78% | 19 | 0.33% | 2722 | 47.8% | 5 | 0.09% |