The strategic location of Nirmali also is quite significant. It lies approximately at 26.32° N 86.58° E. It rises to a height of 59 meters or 193 feet above the mean sea level.
There are several demographers who have conducted surveys and research works, which actually enabled them to throw light on its demographical updates. In this regard it would be unwise if one does not mention about the Census report that has been published in the year 2001. Data like population status, literacy rates etc can be easily from this report. According to this report, the total population of Nirmali has been enumerated to be 16,144. Just like many other places in India, male residents are more in number than their female counterparts. To be specific, male populace constitutes 53 %, while the male populace constitutes 47 % only. In Nirmali, 18 % of the population constitutes of children who are below six years of age.
Literacy rates too can act as vital information about Nirmali. It is to be noted that the average literacy rate constitutes 45 %, which is even lower than that of the entire nation, which constitutes 59.5 %. Out of it, male literacy rate constitutes 57 %. Just like population status, female literacy rate also constitutes 31 % only. Kosi River, popularly known as the sorrow of Bihar, flows in the vicinity.
To facilitate accessibility, Nirmali is well connected by airports and railways. Patna Airport is built in the closest proximity. Nirmali Railway Station is a terminus station which lies in Sakri-Nirmali meter gauge section. It suffices the requirements of the local people of Nirmali.