A survey was conducted in major rice tracts of Kerala i.e. Kole, Kuttanad and Palakkad during 2018 and 2019 to assess the distribution and occurrence of Sacciolepis interrupta. In Palakkad and Kole tract the highest density, frequency, abundance, relative density, relative frequency, and summed dominance ratio of Sacciolepis was recorded whereas, in Kuttanad tract it was Echinochloa crusgalli followed by Sacciolepis. Weed vegetation analysis indices were lowest in Palakkad compared to Kole and Kuttanad tract showing a high degree of domination of one species in Palakkad and larger diversity of weed species in other two tracts. The cluster analysis classified Sacciolepis types into 6 groups at 66.67% similarity level, and using principal component analysis these morphotypes were clustered into 3 groups A, B and C based on morphological characters. Association between Sacciolepis types and soil nutrient parameters indicated that Group A was abundant in less fertile saturated soils whereas group B and C were dominant in nutrient rich submerged soils of Kole and Kuttanad. The study concludes that Sacciolepis interrupta is a serious weed problem in direct seeded rice of Palakkad tract and is fast attaining the status of a dominant weed in other rice tracts also, thereby becoming a major menace in rice fields of Kerala.