Kosi Kalan has got a rich history behind it. Experts believe that primitive name 'Kush-van' which means grass forest in English has been shortened to become Kosi Kalan. To facilitate accessibility Kosi Kalan is well connected by rails, roads and airports. Railway Station, lying on the Delhi-Mathura main line, and also airport at New Delhi lie in vicinity. This airport is almost 100 kilometers away from Kosi Kalan. It is also the opinion of experts that Kosi Kalan is quite famous for cultural and business and commercial activities.
Numerous towns and cities have developed in every nook and corner of Indian states. The sate of Uttar Pradesh too is not an exception. Amongst several states that have flourished here one can easily distinguish the importance of Kosi Kalan. In fact Kosi Kalan is an example of a residential locale. It has its location in the district of Mathura of the same state of Indian Territory. For supervising its administration, a municipal board has been established.
No discussion on any town becomes complete without gathering the first hand information about its demographical situation. Thus a handful of demographers have been employed so that they could carry on numerous surveys and research works in Kosi Kalan. As a result they have achieved success in preparing reports on the basis of their findings. One of the significant reports is the Census report of a specific year. Being issued forth in the year 2001 it enlightens people on certain facts that are related to Kosi Kalan like population status, literacy rate etc. As per this report, the total population of Kosi Kalan has been enumerated to be 45,684. Like all other places in Kosi Kalan also number of males is more than that of females. This is quite evident from its population status. Thus in Kosi Kalan, male populace constitutes 54 %. However total population of females is only 46 %. In Kosi Kalan, 18 % of the population constitutes of children who are below six years of age
From this Census report, one can also decipher information about its literacy rate. Thus the average literacy rate constitutes 51 %, which is even lower than that of India, which has shown a measurement of 59.5 %. Out of it, male literacy is 59 %, while the rate of female literacy is 41 %.