Minjur is located at 13°16′N80°16′E / 13.27°N 80.27°E / 13.27; 80.27. It has an average elevation of 11 metres (36 feet).
With Ponneri as its north, Cholavaram as its west, Manali New Town, Manali and Thiruvottiyur as its south, it is situated about 25 km from north of chennai and a well connected to city with roadways and railways. Minjur is a well-developed town which comprises more than 20 villages around it with most villages underdeveloped in terms of roads, schools. Minjur belongs to Ponneri taluk. Minjur name derived from great man Mr. Muganja Munivar lived in this place.
As of 2001[update] India census, Minjur had a population of 23,947. Males constitute 50% of the population and females 50%. Minjur has an average literacy rate of 77%, higher than the national average of 59.5%: male literacy is 84%, and female literacy is 71%. In Minjur, 10% of the population is under 6 years of age. Almost half the population dwells near and around ponneri as almost all state government offices, magistrate,registrar office, major banks is located at Ponneri. Minjur is a major vegetables consumables market for below poverty line people in the nearby villages. Minjur is also a key residential area for many years for Union Employees of Hinduja Group Companies located in Ennore and Tamil Nadu Electricity board Employees.
Minjur is one of the suburban places of Chennai which is highly growing in terms of Education, Industrialization, Agriculture which is expanding leaps and bounds. Minjur in its area wise twice than that of Thiruvottiyur and thrice of Ponneri which is very much near to minjur.
Minjur desalination plant which supplies 100 million litres a day water to Chennai city was inaugurated on July 31, 2010.
Outer Ring Road (ORR) which connects the southern chennai (Vandalur on NH 45) to Minjur is a main part of the CMDA's Second Master Plan for the greater Chennai.