ABSTRACT: Aim: The objective of this study was to determine the prevalence of periodontal diseases and treatment needs in patients visiting, College of Dentistry, Prince Sattam Bin Abdulaziz University, Alkharj. Methodology: In our study, 400 patients were included within the age group of 15 to 60 years. Using the CPITN index, the status of periodontium as well as treatment needs was recorded. The data was subjected to statistical analysis using frequency calculation. Pearson Chi-square test was used to measure the significance. Results: mAs far as CPITN score was concerned, in the age group of 30-40 years of age group, maximum score was Code 2 (calculus deposition) whereas in comparison age group 40-50 years had Code 3 (shallow pockets) and 50-60 years had Code 4 (Deep pockets). There was an increasing shift of this percentage as the older age group was approached. In case of age group of 40-50 years, around 34.3% of participants were in need of complex periodontal treatment. This trend was increased for the age group of 50-60 years (54.1%). Conclusion: We observed that as the age advanced the CPTIN score increased as well as treatment needs in relation to complex treatment strategy also augmented. It is essential to know the importance of the treatment needs of patients so that proper age based therapy can be carried out.