| Keelaiyur | |
| Settlement Type: | village |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Nagapattinam district |
| Unit Pref: | Metric |
| Population Total: | 3139 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 611103 |
| Registration Plate: | TN-51 |
| Blank1 Name Sec1: | Coastline |
| Blank1 Info Sec1: | 0km (00miles) |
| Blank2 Name Sec1: | Nearest city |
| Blank2 Info Sec1: | Nagapattinam |
| Blank3 Name Sec1: | Sex ratio |
| Blank3 Info Sec1: | 990 ♂/♀ |
| Blank4 Name Sec1: | Lok Sabha constituency |
| Blank4 Info Sec1: | Nagapattinam |
Keelaiyur is a village in the Kilvelur taluk of Nagapattinam district, Tamil Nadu, India, between Nagappattinam and Thiruthuraipoondi. Agriculture is the main occupation. It is 20 km from the district capital Nagapattinam and 350 km from the state capital, Chennai.
census, Keelaiyur had a total population of 3,139 with 1,577 males and 1,562 females.[1]
As of 2015, Keelaiyur had a Govt Higher Sec School and a Govt elementary school.