In West Bengal the Howrah district is very much popular mainly for its developed economy as well as heritage of British India. Here this article is mainly dealing with the changes, occurring in different economic sectors of Howrah district in recent years and the effects of such changes on its economy. Various cartographic techniques and calculation have been employed to analyze the trend in economic sectors and its impact on district economy. From the study it is observed that the district has no strong base in primary sector. Mainly the industrial sector dominated the economy up to 1993 but after that the dominancy shifted towards service sector and huge number of employment generated from 1993 to till now through it. Here it is found that such alteration provides a positive outcome to the district economy as well as state economy. Due to colossal contribution of secondary and tertiary sector, Howrah achieves 2nd and 3rd position in case of GDDP and NDDP respectively among the districts of West Bengal during 2004-05 to 2012-13 and also helps to increase the growth rate of Per Capita Income (19.27% per year) of the district in last few years. Though it has good economic background, has been facing some challenges like – low work participation rate, shortage of cultivable land, less improvement of agricultural allied activities, low female work participation in rural areas etc.