Geography of Tiruvallur district in Tamil Nadu is suitable for the raising of Casuarina tree. The district of Tiruvallur is surrounded by the Kanchipuram district to the south, the district of Vellore in the west, the state of Andhra Pradesh to the north and the Bay of Bengal to the east. It is spread over a vast area of about three thousand four hundred and twenty two square kilometers. In it locate between twelve degree fifteen minutes and thirteen degree fifteen minutes to the north latitude and between seventy nine degree fifteen minutes and eighty degree twenty minutes to the east longitude. The district of Tiruvallur in the state of Tamil Nadu in India is a newly formed district by the bifurcation of the erstwhile Chengalpattu district on the 1st of January 1997. This is situated in the north-eastern region of the Tamil Nadu state.

The coastal region of this district is mainly flat while some areas in Pallipattu and Tiruttani taluks are undulated and even hilly. The types of soil predominantly found in this district are red non-calcareous and coastal alluvial. Sandy soil mixed with soda or other alkali is also found here. The soil found in the coastal region is of the erinaceous type which is suitable for Casuarina tree. Out of the total geographical area of the district, the not sown area constitute thirty five percent whereas forest covers 5.8 percent. The average rainfall of the district is 1104.4 millimeter, of which the north-east monsoon contributes to the tune of six hundred and ninety millimeter. The average maximum temperature experienced in this district is 37.9 degree Celsius and the average minimum temperature experienced here is 18.5 degree Celsius.

Similar to other parts of the state of Tamil Nadu, hot climate prevails in this district during the month of April-May and humid climate during the rest of the year except December-February when it is slightly cold. The primary occupation of this district is agriculture and allied activities and about forty seven percent of the total work forces are engaged in the agricultural sector. The major crops grown here include rice, black gram, sugarcane, groundnut, etc. Apart from seasonal rivers like Aravar, Kesathaliar, Nandi, Coovam, Kallar and Buckhingham Canal there is no perennial river in the district. Since these seasonal rivers are not sufficient, irrigation through tube wells, tanks and open wells are very common.

There are not much hills of sizeable height present in the district of Tiruvallur. There are quite a few conical hills or ridges of small elevation in this district and some of the hillocks are there in Tiruttani. Most of the hillocks and hills are rocky and no verdant vegetation is seen in their slopes. The area covered by forest in this district is also very small.