We　have　delineated　ten　years　of　urban　subsidence　derived　from　continuous　GPS　stations　operated　by　the　Crustal　Movement　Observational　Network　of　China　(CMONOC)　within　and　adjacent　to　the　municipality　of　Tianjin.　A　method　for　obtaining　accurate　site　velocities　with　respect　to　a　stable　regional　reference　frame　is　described.　CMONOC　stations　in　Jizhou　(JIXN)　and　Baodi　(TJBD)　districts　recorded　minor　subsidence　of　approximately　1　to　2mmyr1　during　the　period　from　2010　to　2019.　One　station　in　Wuqing　(TJWQ)　district　and　one　station　in　Binhai　(TJBH)　district　recorded　steady　subsidence　of　approximately　5　and　2　cm　yr1　from　2010　to　2019,　respectively.　One　station　in　Cangzhou　(HECX)　of　Hebei　Province,　adjacent　to　Tianjin,　recorded　steady　subsidence　of　approximately　2.4　cm　yr1　during　2010-2014　and　more　rapid　subsidence　of　4　cm　yr1　since　2015.　TJWQ　recorded　the　most　rapid　land　subsidence　and　the　most　significant　seasonal　ground　oscillations　(uplift　and　subsidence)　among　these　five　stations.　This　study　indicates　that　subsidence　rates　in　Tianjin　vary　significantly　in　space　and　time.　Particular　attention　should　be　paid,　therefore,　to　extrapolate　or　infer　a　rate　of　subsidence　for　an　area　on　the　basis　of　a　subsidence　rate　obtained　from　previous　GPS　observations　or　proximal　GPS　sites.　The　subsidence　time　series　presented　in　this　study　provide　reliable　ground　truth　and　constraints　for　calibrating　or　validating　subsidence　estimations　from　numerical　modeling　and　repeated　surveys　using　other　remote　sensing　techniques,　such　as　Interferometric　Synthetic　Aperture　Radar　(InSAR).　©Author(s)　2020.