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　＜65).　Greenness　and　open　space　did　not　have　a　significant　association　with　stroke　mortality.　Since　a　significant　connection　was　expected,　this　leads　to　questions　about　the　health-inducing　efficacy　of　Hong　Kong＇s　compact　open　spaces　(natural　greenery　being　limited　to　steep　slopes,　and　extensive　impervious　surfaces　on　public　open　spaces).　In　conclusion,　urban　plans　and　designs　for　stroke　mortality　prevention　should　implement　age　specific　health　care　to　neighborhoods　with　particular　population　segments.