In nearly all countries where iodine deficiency occurs, it is now well recognized that the most effective way to achieve the virtual elimination of IDD is through USI. Iodized salt is a safe, cost-effective, and sustainable strategy to ensure sufficient intake of iodine by all individuals. The aim of the study is measure the relationships of maternal knowledge and attitudes with the use of iodized salt and influence on urine iodine status. This was a cross sectional. The sample of this study were women of childbearing age 18-45 years old and pregnant women with gestational age from 2-9 months. The selection of districts and villages determined purposively by the by the place were emergence cases of IDD. Variables taken the level of knowledge, attitudes, content of iodized salt and urinary iodine status. The result showed that there was no relationship between level of knowledge and attitudes with the content of iodized salt. There was no relationship between level of knowledge and attitudes with urine iodine status. There is a relationship between levels of iodine in salt with urine iodine status. Salt quality monitoring needs to be done more intensively and for the low quality of salt grown withdrawn from the market, the extension shall be made by taking into account the background of the respondents, such as level of education.