The backbone of Indian economy is the unorganized sector. Predominance of unorganized sector and informal employment has been the central feature of Indian economy, for past several decades. The significance of the unorganized sector in the employment front since early 1980s and even before that more than 90 percent of total workforce has been engaged in the informal economy. Employment of girls in unorganized sector belongs to a greatly disadvantaged working area in the country. They usually come from lower caste, with very little education. The present study was focused on girls working in unorganized sector in different areas of Lucknow district. Objective of the study: Prevalence of girls working in unorganized sector of Lucknow district. Methodology: The cross sectional study was administered in the areas located in Lucknow district. The personal and family socio - economic status of the girls working in unorganized sector were recorded. Questionnaire schedule was used to collect the information. Socio- economic status was assessed in terms of income per month of the respondent, family income, family size, father and mother occupation, etc.; those areas were selected using multistage random sampling techniques. The results revealed that from the selected areas a total number of 1200 working children, were surveyed and found 600 girls were working various unorganized sector namely brick worker, construction worker and chikankari worker. The present study focused on the Girls belonging to the age group of 8 to 14 years who were not attending school and school dropout. On analyzing their socio- economic profile, it was found they were from very low economic strata. Inspite of the Government amending the child labour prohibition bill 2016, the girl child labourers are still existing in Lucknow (U. P).