This article gives a baseline assessment of social capital in the UK using the latest data available. The data are based on the draft headline measures proposed by ONS in July 2014, and further developed following user consultation (ONSb, November 2014). The 25 measures have been developed using a framework that covers four key aspects of social capital: personal relationships, social network support, civic engagement and trust and cooperative norms. In general terms, social capital represents social connections and all the benefits they generate. Social capital is also associated with civic participation, civic-minded attitudes and values which are important for people to cooperate, such as tolerance or trust. “Social capital is the glue that holds societies together and without which there can be no economic growth or human wellbeing” (Grootaert, 1998). Without the social connections that link people to each other and lead them to exchange resources, without trust and other cooperative norms of behaviours, society could not function. The networks of individual relationships with family and friends, local community and through civic engagement, form the fabric of a cohesive society.