Henry Borwin III, Lord of Rostock

Henry Borwin III, Lord of Rostock (c. 1220 – 1 August 1278) was a member of the House of Mecklenburg.

Since Henry Borwin III was still a minor when his father died in 1226, his brother Nicholas I acted as regent until 1234.

In 1234, the brothers divided Mecklenburg among themselves; Hernry Borwin III received the Lordship of Rostock.

Henry Borwin III came into conflict with the emerging Hanseatic cities of Rostock and Wismar.

After the overthrow of Pribislaw I, Henry Borwin gained control of a part of Parchim-Richenberg.