Cockenzie Harbour sits on the Firth of Forth coast in East Lothian, Scotland, within the unified town of Cockenzie and Port Seton, roughly four miles east of Musselburgh.

The harbour's origins trace back to 1591, when Cockenzie was chartered as a burgh by James VI, and it grew in importance as a key outlet for coal mined around nearby Tranent.

Like the surrounding area, it also became associated with salt extraction, where sea water was evaporated in metal pans heated by coal fires. Today the harbour remains active and offers picturesque views of the Firth of Forth.

A coastal path connects it to the neighbouring Port Seton harbour, forming part of a broader shoreline route that includes sections of the John Muir Way, making it a pleasant access point for walkers exploring the East Lothian coast.