Neighborliness, a key component of neighborhood social capital, is associated with improved health and well‑being and may be influenced by the built environment. This cross‑sectional study examined associations between neighborhood design features and levels of neighborliness across eight neighborhoods in Portland, Oregon. Using linked data from systematic neighborhood observations, resident surveys, and demographic sources, multinomial logistic regression models were applied. Higher neighborliness was associated with better self‑reported health, longer neighborhood residence, older and higher‑valued homes, absence of litter or graffiti, and greater sidewalk connectivity, suggesting that modifiable built‑environment features may foster social capital.
