There are several programs, projects, and policies focused on supporting Mexican street children; however, there are some needs that are not yet covered, such as oral health. Objective: to assess dental caries (deft and DMFT) and treatment needs in Toluca city's street children. Methods: With informed consent previously obtained from a parent, guardian, or legal representative, we randomly selected 318 street children, aged 0 to 18 years, from Toluca city, State of Mexico. Dentition Status and Treatment Needs were recorded according to WHO criteria (1997). The oral examination was carried out on site in daylight. Results: Caries prevalence was 94.96%. The mean DMFT was 5.78 (5.57 decayed), while deft was 4.63 (4.54 decayed). Evaluation of treatment needs in the primary dentition revealed that 43.98% teeth required no treatment, 20% needed fissure sealants, 19% required one surface restoration, and 13.19% needed restoration in two or more surfaces. In the permanent dentition, the treatment needs were as follows: 51.27% teeth did not require treatment, 22.96% needed fissure sealants, 18.43% required one surface restoration, and 5.32% needed restoration in two or more surfaces. Conclusions: These findings reflect the high caries prevalence in Toluca city's street children. There is a significant need for dental treatment, with surface fillings the treatment most required. These data can serve as a platform to implement preventive and restorative dental health programs that meet the needs of Mexican street children.