As of 2001 India census, Kalamassery had a population of 63,176. Sex ratio is 956 females per 1000 males. Kalamassery has an average literacy rate of 84%, which is well higher than the national average of 59.5%. Male literacy is 87%, and female literacy is 82%. In Kalamassery, 10% of the population is under 6 years of age.
The soils consists mainly of recent sediments (Alluvium, Teri’s, Brown sand etc.). Red colored sticky soil is also found in these areas. The climate is generally tropical, heavy rains from the southwest and northeast monsoon are common from June through September. The average annual rainfall is about 350 cm.
FACT, India’s 1st large scale unit was set up in 1943 for production of fertiliser. In 1947, FACT Udyogamandal started production of ammonium sulphate with an installed capacity of 10,000 MT nitrogen. FACT became a Kerala State Public Sector Enterprise on 15 August 1960 and on 21 November 1962; the Government of India became a major Shareholder. FACT engineering works was established on 13 April 1966. Aluminium oxide is also produced in Kalamassery.Apollo Tyres tyres acquired the Premier Tyres plant in Kalamassery. The Hindustan Machine Tools also known as HMT is also located at the hearts of Kalamassery . Carborundum Universal Electro-minerals division has its production unit at South Kalamassery. Many Vehicle service centres like Toyota , Renault , Nissan , Volkswagen, Fiat India Automobiles etc., are located at Kalamassery.The Kerala State Electricity Board or KSEB sub-division is at Kalamassery . The Kochi Metro Casting Yard and Metro Village is located at HMT Colony in Kalamassery . The Science City , Startup Village , KINFRA are at Kalamassery. The Water from Periyar is supplied to Kochi City by Various pipes placed which are managed by the PWD and the Kerala Water Authority.
There are also many small scale industries in Kalamassery like St Antony Industries, Micro Tools, Ambadan Industries, Vellappally Manufacturing Industry, Pottekattu Rubbers Pvt.Ltd, Logiwiz , Bajaj etc. A part of South Kalamassery is as an Industrial area, with small scale industries such as perfume making industries and plastic recycling industries. Many people are engaged in employment through these industries. There are also Kudumbasree associations, employing many women. The Main Headquarters of Vodafone India is at South Kalamassery.
Museum of Kerala History has representations of 87 figures who shaped the history and culture of Kerala in the last two thousand years. The museum has a collection of 150 dolls, all hand-made and detailed, representing the cultural and ethnic diversity of India. The dolls represent young men and women from Gujarat to Nagaland and from Kashmir to Kanyakumari. The gallery depicts mainly specimens of Indian contemporary art (painting and sculpture) over a period of the last two hundred years. The gallery also displays a mural painting based on the classical Sanskrit drama Shakuntalam executed in the traditional Kerala. The mural, at 25 feet long and 5 feet wide, is one of the largest in Kerala.