Technological environments change social interactions within local communities, potentially leading to the erosion of the sense of local community. In this study, we examined the social, psychological, environmental, and technological factors that predict a sense of local community. Employing a longitudinal approach, we analysed predictors of a sense of local community among Finnish adults aged 18–80 years (N = 1,226) at three time points (spring 2021, spring 2022, and spring 2023). Our results, based on hybrid multilevel regression models, showed that greater neighbourhood engagement and perceived residential environment pleasantness positively predicted a sense of local community over time. Neighbourhood engagement, perceived residential environment pleasantness, use of neighbourhood technology, and positive attitude towards neighbourhood technologies showed positive effects and perceived loneliness and perceived level of urbanization negative between‐person effects, on a sense of local community. The results shed light on the determinants of a sense of local community and carry implications for broader community engagement efforts. Enhancing perceived residential environment pleasantness and promoting more active engagement within neighbourhoods could help increase a sense of local community. Future initiatives may also focus on utilizing neighbourhood technology as a tool to help strengthen a sense of local community. Please refer to the Supplementary Material section to find this article's Community and Social Impact Statement.