Malnutrition (underweight, stunting, and wasting) in infants is still common nutritional problems in
Indonesia. Many factors affect infant malnutrition, including inappropriate infant feeding. Maternal
sociodemographic factors are also thought to affect infant malnutrition. The objective of this study
was to analyze factors associated with the nutritional status of infants aged 6-12 months according
maternal sociodemoghraphic and infant feeding practice in Bogor. This study used cross-sectional
design with sample of 92 mothers of infants and 92 infants aged 6-12 months. Variables in this
study were maternal characteristics (age, education, occupation, and family economic status), infant
feeding practices (exclusive breastfeeding and formula feeding before 6 months old), and infant
anthropometric (weight and height). Nutritional status was analized using WHO Anthro software.
Data analysis using Chi-square test. Results showed the prevalence of underweight, stunting, and
wasting was 4.3%, 13%, 9.8%, respectively. There was a significant association between maternal
education and family economic status with infant nutritional status (HAZ and WAZ) (p <0.05). It
is necessary to improve maternal knowledge on appropriate infant feeding practice to reduce infant
malnutrition.