The　analytical　solution　for　the　lateral　dynamic　response　of　offshore　large-diameter　pipe　piles　embedded　in　seawater　and　layered　saturated　seabed　soil　is　proposed.　The　hydrodynamic　pressures　of　the　outer　and　inner　seawater　are　derived　based　on　the　inviscid　compressible　assumption　of　fluid,　and　the　dynamic　soil　resistances　of　the　outer　and　inner　layered　saturated　seabed　soil　are　derived　based　on　Biot＇s　poroelastic　theory.　The　analytical　expressions　of　the　lateral　dynamic　response　of　the　pile　are　obtained　by　using　the　transfer　matrix　method,　and　the　dynamic　characteristics　of　the　lateral　response　of　offshore　pipe　piles　are　parametrically　investigated.　It　is　concluded　from　the　analysis　results　that　the　outer　and　inner　hydrodynamic　pressures　significantly　affect　the　natural　frequency　of　the　pile–water–soil　system.　Additionally,　employing　a　homogeneous　soil　model　with　the　same　average　modulus　to　represent　the　layered　seabed　soil　can　lead　to　significantly　inaccurate　estimations　of　the　natural　frequency　and　pile-head　displacement　of　offshore　pipe　piles.　©　2024　Elsevier　Ltd