This brief presents work on the conceptualization and measurement of collaboration in the field of early childhood. The brief identifies key components of collaboration and encourages the development and use of measures of collaboration in the early childhood field. The brief presents a state-level collaboration logic model, depicting the key components of collaboration, and identifies and considers existing measures of collaboration. The authors provide recommendations for future research designed to explore the nature of collaborations within the early care and education setting, as well as for the development of measures that could facilitate this research.