Introduction: Low Levels Of Iodine In Diets For People Who Do Not Get Enough Iodine From Their Food May Lead To Health Problems Collectively Referred To As Iodine Deficiency Disorders (IDD). It Is A Major Public Health Problem For Populations Throughout The World That Affects Humans From Early Fetal Life To Adulthood. IDD Among Sarawakian Schoolchildren Has Been Highlighted As A Substantial Public Health Problem. It Has Mandated Universal Salt Iodization (USI) Implementation In Sarawak Since 2008. The USI Has Been Shown To Reduce The Risk Of IDD In Sarawak. However, There Are Some Cases Of Unnecessarily High Iodine Intakes That May Occasionally Be Associated With Iodine-induced Hyperthyroidism. Thus, This Study Aims To Determine The Current Nutritional Iodine Status And The Impact Of Universal Salt Iodization (USI) Among Schoolchildren (SC) In Sarawak. METHODOLOGY: This Cross-sectional Iodine Deficiency Disorder Survey Was Conducted From April To May 2018 Among Schoolchildren Aged 8–10 Years In Sarawak. After Ten Years Of The Universal Salt Iodization Implemented In The State, We Assumed The Population In Sarawak Had Access To The Iodized Salt. Sarawak Is Divided Into 31 Districts, And The Multistage Proportionate To Population Size Sampling Technique Was Used To Randomly Select Schools. A List Of The Government Primary Schools In Sarawak And Their Enrolment Was Obtained From The Sarawak State Education Department. Subsequently, A Total Of 30 Schools Were Proportionally Selected In The State. In Each Of The 30 Selected Schools, 40 Children Aged 8 To 10 Were Randomly Selected By Systematic Sampling. A Total Of 1200 Schoolchildren Will Be Involved In The Study. All Required Data Will Be Obtained Through Interviews On Dietary Iodine Intake, Anthropometric Examination, Thyroid Size Examination, Hyper/hypothyroidism Assessment, And Analysis Of Urine From The Study Respondents. The Iodine Content In The Salt From SC's Home And School Kitchen Will Also Be Determined.