Introduction: - The major problem that currently faced urban areas is the increased population, which resulted in lack of sufficient food for the community. Therefore, understanding the determinants of HFI is important to design interventions for ensuring food security in cities like Addis Ababa. Poor nutritional status of children and women is also problem in Ethiopia. Thus, it is also crucial to generate evidence about the nutritional status of women to reduce maternal mortality and morbidity. Objective: -To assess household food insecurity and nutritional status of women of the reproductive age group, in Kirkos Sub-city, Addis Ababa. Methods: - Community based cross sectional study was conducted among Women of Reproductive Age Group in October 2020.A multiple stage sampling procedure was used and at first, five of sub-city’s woredas were selected through random sampling technique. Secondly, the calculated sample (532) was proportionally allocated to all the selected woredas. Finally, eligible women were selected from the sampling frame using systematic random sampling. Data were collected through questionnaire and by measuring the height and weight to calculate BMI. Multiple binary regressions was used to quantify the association between household food security and nutritional outcomes of women, while considering other covariates potentially associated with the outcome variables of interest. Results: Four hundred eighty seven women were involved with a response rate of 91.54 % and it was found that 80.9% households were food insecure while 12.9% women were underweight. Households headed by female were less likely to be food secured compared with male headed households (AOR= 0.09, 95% CI= 0.03-0.29). Women aged 20-29 years were more likely to be food secured compared with women belong to the age group 15-19 years,(AOR= 7.42, 95% CI= 1.59-14.50). Households with > 2 children of under 5 years were more food insecured than households with no children <5 years (AOR= 0.04, 95% CI; 0.02-0.13). Besides, the likely of underweight for a woman is higher for food insecured households than the secured ones