Mental health disparities persist among underserved populations, including racial/ethnic minorities, LGBTQ+ individuals, and those residing in rural communities. Culturally competent nursing care, community partnerships, and advocacy efforts are essential for addressing these disparities. This review examines strategies for delivering culturally competent mental health care, fostering community partnerships, and advocating for policy changes to reduce mental health inequities in underserved populations. Key topics include cultural competence training for nurses, collaboration with community organizations, and advocacy for equitable access to mental health services. By implementing these strategies, nurses can play a vital role in advancing mental health equity and improving outcomes for underserved populations.