**Background:** Involving communities in research priority setting can improve research relevance and health outcomes, but such exercises often lack clarity on community involvement and seldom include ethnic minorities. This study, set in the multicultural, deprived city of Bradford, UK, aimed to identify community priorities for keeping children happy and healthy, using a co-produced approach within the Born in Bradford (BiB) research programme. Bradford has a young, multi-ethnic population; a quarter of children live in poverty, and over one third of electoral wards are among the 10% most deprived in England.
**Methods:** A 12-member multi-disciplinary, multi-ethnic community steering group led a modified James Lind Alliance (JLA) approach between December 2018 and March 2020. A paper and online survey asked respondents to list three important things to keep children (i) happy, (ii) healthy, and what needs to change to improve either. Free-text data were coded iteratively by community researchers. Shared priorities were co-produced in workshops with the steering group and community members. The survey was open to anyone living, studying, or working in Bradford District.
**Key Results:** 588 respondents identified 5,748 priorities, coded into 22 themes. For health (Q1: what researchers should find out), diet/nutrition (26%) and exercise (12%) were most common, followed by home life/family relationships (8%), health education (5%), and mental/emotional health (5%). For what needs to change to make children healthier (Q3), diet/nutrition (25%) and exercise (10%) remained top, but community assets rose to third (8%), followed by education/activities (6%) and parent support/input (6%). For happiness (Q2: research focus), home life/family relationships (17%) ranked first, then listening to children (13%), education/activities (10%), mental/emotional health (9%), and social world (9%). For what needs to change for happier children (Q4), community assets and home life/family relationships tied (12% each), followed by education/activities (10%), mental/emotional health (8%), and social world (7%). Respondents were 84% female, 60% White, 30% Asian British/Asian, and 91% lived in Bradford District. From the survey data, the steering group developed 27 research questions covering diet, physical activity, mental health, family relationships, community assets, pollution, education, and social inclusion.
**Clinical Implications:** Communities identified distinct priorities for health (physical factors like diet/exercise) versus happiness (relational and emotional factors like family relationships and being heard). Structural factors (community assets, education) were seen as key levers for change. The co-produced research questions provide a community-informed agenda for BiB, ActEarly, and the NIHR Applied Research Collaboration, ensuring future research addresses locally relevant determinants of child health and wellbeing. The study demonstrates a feasible model for inclusive, power-sharing priority setting with multi-ethnic populations, though the authors note priorities may have shifted due to the COVID-19 pandemic.