AbstrakObesitas di Indonesia mulai menjadi masalah gizi masyarakat walaupun gizi kurang masih tinggi. Obesitas disebabkan oleh banyak faktor/multifaktorial yang dapat dibagi menjadi genetik dan lingkungan yang diantaranya adalah status sosial ekonomi dan gaya hidup. Penelitian ini menggunakan desain cross sectional study dengan populasi adalah seluruh siswa kelas I sampai V di SD N 08 Alang Lawas,Padang. Penelitian ini mendapatkan hasil 8,21% siswa mengalami obesitas, 11,79% overweight atau gemuk, 82,60% tingkat pendapatan orang tua siswa berada di atas garis kemiskinan, 71,30% ayah dan 71,80% ibu siswa memiliki tingkat pendidikan menengah, 58,50% siswa memiliki pola makan baik, dan 60% memiliki aktifitas fisik aktif. Tidak didapatkan hubungan yang bermakna antara kejadian obesitas dengan tingkat pendidikan orang tua (ayah: p=0,205 ; ibu: p=1,00), tingkat pendapatan orang tua (p=0,396), dan pola makan anak (p=0,245). Didapatkan hubungan yang bermakna antara aktifitas fisik anak dengan kejadian obesitas (p=0,048). AbstractIn Indonesia, obesity has became a public nutrition problem although frequence of undernutrition was still high. The obesity caused by many factor/multifactorial that asssigned to genetic factor and environment factor. Two of the environment factors are social-economy and life style. Cross sectional study was chosen as a method to conduct the study. The study population were all the students on 1st grade to 5th grade in SD Negeri 08 Alang Lawas, Padang. The result shows that 8.21% of the students suffered from obesity, 11.79% were overweight, 82.60% of the students have the parents that have income more then the poverty line, 71.30% of the fathers and 71.80% of the mothers were middle graduations, 58.50% have good consumptions pattern, and 60% have active physical activity. There are no association between the obesity among the children with parent's graduation (father: p=0.205; mother: p=1.00), parent's income (p=0.396), consumptions pattern (p=0.245), and there is association with physical activity (p=0.048).