As part of the decadal conference series, OceanObs’19 will galvanize ocean observing communities to improve coordination of regional and national efforts to better observe the global ocean, to better respond to the joint scientific and societal needs of a fit-for-purpose ocean observing system, and maximize the overall benefit of more integrated observing. Each conference of the OceanObs series has focused/will focus on a new area in need of enhanced guidance. OceanObs’99 resulted in an internationally coordinated system for physical climate and ocean carbon observations. OceanObs’09 expanded the range of communities working together to undertake more comprehensive and sustain ocean observations and led to the Framework for Ocean Observing. OceanObs’19 will seek to better connect observers with end user communities.