Background: Growth and developmental disorders, particularly autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD), are significant public health concerns that profoundly impact children's academic, social, and emotional development. This study aims to assess the level of public awareness and knowledge about ASD and ADHD among the general population in District Solan, identifying knowledge gaps to inform targeted public health interventions. Materials and Methods: A descriptive, cross-sectional survey was conducted from January to May 2024 in District Solan, Himachal Pradesh. The study included 400 participants aged 18 years and older, selected to provide a representative assessment of public awareness and knowledge of ASD and ADHD. Data were collected using a structured, self-administered online questionnaire consisting of 20 questions covering the definition, symptoms, risk factors, and management of ASD and ADHD. The responses were scored, and knowledge levels were categorized as excellent (16-20 points), good (12-15 points), fair (8-11 points), and poor (below 8 points). Descriptive statistics, including frequencies and percentages, were used to analyze the data. Results: The study found that 78.0% of participants were aware of ASD, while 71.0% had heard of ADHD. However, knowledge gaps were evident, with only 63.5% of respondents aware that ASD is more common in boys and 65.5% recognizing delayed speech as a symptom of ASD. Similarly, 74.5% of participants correctly identified hyperactivity and impulsivity as key characteristics of ADHD. The importance of early diagnosis was recognized by 69.5% of respondents, and 72.5% acknowledged the critical role of parental support in managing these disorders. Overall, 21.5% of participants demonstrated excellent knowledge, 35.5% had good knowledge, 27.0% had fair knowledge, and 16.0% had poor knowledge. Conclusion: While there is a reasonable level of general awareness about ASD and ADHD among the population in District Solan, significant gaps in specific knowledge persist. These gaps highlight the need for targeted public health interventions that promote a deeper understanding of these developmental disorders. Enhancing public education on the symptoms, risk factors, and management strategies for ASD and ADHD is essential for improving early recognition and ensuring timely intervention.