Migrants are not equally distributed across the economy. They are strongly concentrated in a number of sectors, especially in low-skilled services but also in information technology and manufacturing. This raises the question of the impact of migration on sectoral development. With the asymmetric employment impact of the COVID‑19 crisis across sectors, and the essential role of migrants in certain key sectors, there is a renewed interest in the links between sectors and migration. This chapter provides a first comprehensive comparative overview of the presence of migrants across sectors in OECD countries. It also assesses how migration policy instruments are associated with specific sectors, with a focus on agriculture, hospitality, and IT. Migration has sectoral implications, whether these are intentional or not. Being aware of the sectoral dimension of migration is a precondition for reaping potential benefits for specific sectors where intended, as well as for avoiding unintended adverse impact.