<![CDATA[Stunting and underweight remain serious nutritional problems among children under five in Indonesia, with national prevalence rates of 17.1% for underweight and 21.6% for stunting, where maternal knowledge and education are presumed to play significant roles yet have rarely been examined simultaneously within a single research design. This study aimed to analyze the relationship between maternal education and nutritional knowledge, both before and after a health education intervention, with the weight status of children under five. A quasi-experimental one group pretest-posttest design was employed involving 40 mothers with children under five, selected through total sampling, and analyzed using Chi-Square test, Wilcoxon Signed Rank Test, and Spearman's rho correlation. Results revealed significant relationships between maternal education (p=0.000; r=0.869) and pre-intervention knowledge (p=0.000; r=0.951) with children's weight status, where all mothers with primary education had underweight children. The Wilcoxon test showed significant knowledge improvement post-intervention (Z=-6.000; p=0.000) with r=0.915 correlation to weight status, confirming the intervention's effectiveness. It is concluded that maternal formal education and nutritional knowledge are strong determinants of children's weight status. Health workers should prioritize intensive nutrition education for low-educated, low-knowledge mothers through sustained programs, while future research should employ control groups and larger samples.]]>
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