This report summary describes highlights of the report on the experiences of 1,482 incarcerated fathers and their intimate or coparenting female partners. It is based on survey data collected for the impact evaluation of the Multi-site Family Study on Incarceration, Parenting and Partnering (MFS-IP). The responses reflect the dual perspectives of both men and their partners. Survey questions addressed relationship quality, parenting and coparenting, family contact, and the well-being of children and mothers during the fathers’ incarcerations. Detailed information about a single “focal child” for each father was also collected. Although this report uses data collected for the MFS-IP evaluation, the results presented here are not findings about the impact of MFS-IP programming.