Global　net-zero　targets　are　reshaping　port　clusters　toward　greener　and　more　coordinated　development.　However,　the　performance　and　hinterland　influence　of　hub　ports　from　a　sustainability　perspective　remain　underexplored.　The　Bohai　Rim,　with　its　high　port　density　and　early　green　transition　efforts,　offers　a　representative　case　for　studying　spatiotemporal　hinterland　evolution　in　this　context.　This　study　uses　panel　data　from　six　major　container　ports　over　the　period　2011-2023　to　build　a　multidimensional　sustainability　indicator　system　that　includes　carbon　emissions　and　sea-rail　intermodal　throughput.　The　sustainability　scores　are　first　applied　in　a　Wilson　model　to　estimate　general　port　influence,　and　then　integrated　with　OD-cost　distance　in　a　field　strength　model　to　delineate　county-level　hinterland　patterns.　The　results　show　that　port　hinterlands　generally　expanded　during　the　study　period,　with　increased　overlap,　stronger　connectivity,　and　more　intense　regional　coopetition.　Qingdao　and　Tianjin　evolved　into　dual　spatial　cores,　and　Rizhao　accelerated　inland　expansion　via　multimodal　transport.　In　contrast,　Dalian　and　Yingkou　showed　limited　hinterland　growth　and　constrained　spatial　influence.　This　study　proposes　a　transferable　integrated　framework　for　sustainability-based　hinterland　analysis,　offering　cross-port　and　cross-regional　applicability　to　support　planning　and　policymaking　under　green　development　goals.　©　2025　The　Authors