Aim: The aim is to examine the impact of cultural diversity on psychological well-being, and subjective happiness and to explore the differences in these constructs among different zones of India. Method: Data were gathered using the Cultural Diversity Questionnaire (CDS), Psychological Wellbeing Scale (PWB), and Subjective Happiness Questionnaire (SHQ) on 200 working men and women. Result: The SPSS-27 has done all the data calculation work from where a significant relationship was found between cultural diversity, psychological well-being, and subjective happiness at P = 0.001 level of confidence. Along with this, a positive impact of cultural diversity was found on psychological well-being and subjective happiness. However, no statistical difference was found among these variables in the context of different zones of India. Conclusion: Celebrating the country’s diversity while working to mitigate its challenges can create a more harmonious and fulfilling society for all its citizens. India is a country of unity in diversity where cultural diversity plays a significant role in shaping the overall happiness and well-being. India can focus on promoting inclusive education and psychological therapies, ensuring equal opportunities, addressing social inequalities, and fostering open dialogues that encourage understanding and respect among different cultural groups.