| Obasamudram | |
| Settlement Type: | village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 13.4804°N 80.168°W |
| Subdivision Type: | Country |
| Subdivision Name: | India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Tiruvallur |
| Subdivision Type3: | Taluk |
| Subdivision Name3: | Gummidipoondi taluk |
| Seat Type: | Panchayat |
| Unit Pref: | Metric |
| Elevation M: | 4 |
| Population As Of: | 2011 |
| Population Total: | 3127 |
| Population Density Km2: | auto |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Blank Name Sec1: | 2011 census code |
| Blank Info Sec1: | 628558 |
Obasamudram is a village in the Tiruvallur district of Tamil Nadu, India. It is located in the Gummidipoondi taluk.[1]
According to the 2011 census of India, Obasamudram has 866 households. The effective literacy rate (i.e. the literacy rate of population excluding children aged 6 and below) is 56.63%.
| Population | 3127 | 1537 | 1590 | |
| Children aged below 6 years | 374 | 181 | 193 | |
| 297 | 147 | 150 | ||
| 193 | 91 | 102 | ||
| Literates | 1559 | 895 | 664 | |
| Workers (all) | 1604 | 955 | 649 | |
| Main workers (total) | 1468 | 924 | 544 | |
| Main workers: Cultivators | 63 | 39 | 24 | |
| Main workers: Agricultural labourers | 526 | 250 | 276 | |
| Main workers: Household industry workers | 27 | 22 | 5 | |
| Main workers: Other | 852 | 613 | 239 | |
| Marginal workers (total) | 136 | 31 | 105 | |
| Marginal workers: Cultivators | 5 | 2 | 3 | |
| Marginal workers: Agricultural labourers | 8 | 2 | 6 | |
| Marginal workers: Household industry workers | 3 | 1 | 2 | |
| Marginal workers: Others | 120 | 26 | 94 | |
| Non-workers | 1523 | 582 | 941 |