With　the　prevalence　of　stroke　rising　due　to　both　aging　societies　and　more　people　getting　strokes　at　a　younger　age,　a　comprehensive　investigation　into　the　relationship　between　urban　characteristics　and　age-specific　stroke　mortality　for　the　development　of　a　healthy　built　environment　is　necessary.　Specifically,　assessment　of　various　dimensions　of　urban　characteristics　(e.g.　short-term　environmental　change,　long-term　environmental　conditions)　is　needed　for　healthy　built　environment　designs　and　protocols.　A　multifactorial　assessment　was　conducted　to　evaluate　associations　between　environmental　and　sociodemographic　characteristics　with　age-stroke　mortality　in　Hong　Kong.　We　found　that　short-term　(and　temporally　varying)　daily　PM10,　older　age　and　being　female　were　more　strongly　associated　with　all　types　of　stroke　deaths　compared　to　all-cause　deaths　in　general.　Colder　days,　being　employed　and　being　married　were　more　strongly　associated　with　hemorrhagic　stroke　deaths　in　general.　Long-term　(and　spatially　varying)　regional-level　air　pollution　were　more　strongly　associated　with　non-hemorrhagic　stroke　deaths　in　general.　These　associations　varied　by　age.　Employment　(manual　workers)　and　low　education　were　risk　factors　for　stroke　mortality　at　younger　ages　(age　©　2021　Elsevier　Ltd