Dobbs Weir Lock (No 6) is a lock on the River Lee Navigation near Hoddesdon.

The lock is south of the nearby Dobbs Weir, and stands close to the confluence of the Lynch Brook and the Old River Lea. To the east of the lock is the Nazeing Mead complex of lakes which incorporates part of the River Lee Flood Relief Channel.

Vehicular access via Meadgate Road from Carthagena Lock.

Walking and cycle access along the towpath that forms part of the Lea Valley Walk.

Broxbourne railway station

• Dobbs Weir lock photographs
• Nazeing Meads Archived 6 June 2011 at the Wayback Machine
• Dobbs Weir Lock - a history