Generating suggestions for user groups in social networks

Implementations of the present disclosure include providing a suggested social circle includes generating a list of contacts who, based on first predetermined criteria, are to be considered for potential inclusion in a social circle to be suggested to a particular user and generating an edge and vertex-weighted graph representation that indicates a strength of the particular user's affinity to each of the contacts. A set of vertices in the graph that has a high overall score based on predetermined factors is identified. After determining that the contacts corresponding to the identified set of vertices should be presented as a suggested social circle to the particular user, social circle data corresponding to the suggested social circle is transmitted, to a client device associated with the particular user, to display a representation of the suggested social circle on the client device.