One of the most important indicators for measuring public health is nutritional status, especially children aged 1-5 years who need adequate nutrition to support good growth and development. The results of the Basic Health Research in 2018 showed that the prevalence of malnutrition among children under five was 3.9% and under-five children under five were 13.8%. The aim of the study was to analyze relationship of age, parity, education, occupation and mother's knowledge on the nutritional status of children in the posyandu sekardangan sidoarjo.

The type of analytic research was observational design and cross sectional approach. The population in this study was 476 mothers who had children aged 0 - 48 months with a sample size of 83 people taken by simple random sampling method. The independent variables in this study were age, parity, education, occupation and mother's knowledge and the dependent variable was nutritional status. The data analysis used to see the relationship is the chi square test with ρ = <0.05

The results show that age ρ = 0.006 (OR: 0.204 95% CI: 0.064 - 0.646), parity ρ = 0.007 (OR: 0.193 95% CI: 0.052 - 0.719), education (OR : 36,667 95% CI: 10,109 - 132,989) and knowledge ρ = 0,000 (OR: 157,143 95% CI: 18,179 - 1358,370). Of all the variables that have the strongest relationship is knowledge and those who have the weakest relationship are parity and for variables that don’t have nutritional status under five years are the work of mothers.