Münster lock, Double lock in Münster, Germany

Münster lock is a double lock facility on the Dortmund-Ems Canal that moves ships between different water levels. The structure has two separate chambers built side by side, allowing multiple vessels to pass through at the same time.

The lock opened when the Dortmund-Ems Canal was completed in 1899, linking different regions of Germany by inland waterway. It has remained a key part of the German water transport network since then.

The lock is run by the Wasserstraßen- und Schifffahrtsamt Westdeutsche Kanäle. Its two chambers handle push barges with two lighters and oversize motor cargo ships, and the upper gate is a flap gate while the lower gate is a mitre gate. The old 1920s tug-barge lock is to be demolished and backfilled.

The lock is at Dingstiege 2, about four kilometres from Münster's main station, northeast of the city centre. The Münster–Bremen railway bridge crosses the canal directly below the lock, so the site can be reached on foot or by bike along the canal. The chambers operate around the clock, though service may be reduced on public holidays.

The old lock had a dry dock west of the upper harbour, on waterway authority land, where ships were built and repaired; it was closed on three sides. The three earlier chambers, all pound locks, stayed in service until 2004. The disused tug-barge lock is to be demolished and backfilled.