Objectives: The aim of this study was to determine the “community indicator” for dental caries among secondary school children in Federal Territory Kuala Lumpur (FTKL). Methods: An ecological study using aggregated data from Oral Health Information System (HMIS) for caries data and school database for school factors was conducted. School factors included were types of school, school performances at PMR in Mathematics, Bahasa Melayu, Science and English, school socioeconomic circumstances and school material deprivation. All secondary schools (day school) in FTKL were included in this study. Results: Bivariate Analysis identified that school mean DMFT was significantly associated with school performance in English (p= 0.02) and school socioeconomic code (p= 0.005). School performance in English was able to explain about 10 percent of the variation in school mean DMFT and School socioeconomic code was able to explain about 14 percent of the variation in school mean DMFT. The final model that includes school performance in English and school socioeconomic code was able to explain 17 percent of the variations in school mean DMFT. Conclusions: School performance in English at PMR and school socioeconomic code could be used as a community indicator to identify secondary school with high caries level in FTKL.