An Arctic coastal erosion process or mechanism is distinct from a non-Arctic erosion process due to the importance of thermal processes in addition to mechanical ones. The Arctic contains permanently frozen soil (permafrost) as well as soil and sediments that freeze seasonally. Thawing of the coastal permafrost and seasonally frozen soils/sediments is a critical and distinctive feature of Arctic coastal erosion. Thus, the Arctic coastal erosion modeler must include both thermal and mechanical processes in their models, either implicitly or explicitly. Arctic coastal erosion modeling features the identification of particularly Arctic coastal configurations and the development of process-based and predictive Arctic coastal erosion models for those specific configurations. In this chapter, recent advances in Artic coastal erosion modeling are presented, with a particular focus on the work done in Arctic Alaska. In addition, suggestions for next steps are offered. Much of the Arctic coastal erosion modeling has focused on cross-shore processes and sediment transport. In the future, Arctic modelers will need to include longshore transport processes and account for their contribution to erosion and shoreline change. © 2018 by World Scientific Publishing Co. Pte. Ltd. All rights reserved.