Lutter is a small river in the Lüneburg Heath, Lower Saxony, Germany, right tributary of the Lachte.

The Lutter has its source near Weyhausen [de] (district of Eschede), 7 km (4.3 mi) southeast of Unterlüß. It passes Bargfeld (where it is joined by the Schmalwasser), Eldingen, and Luttern (a district of Eldingen). It flows into the river Lachte at Jarnsen [de], near Lachendorf, east of Celle.

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  The Schmalwasser joining the Lutter near Bargfeld
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  Headwaters of Lutter at Eschede-Weyhausen [de]
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  Water mill at Lutter in Marwede (part of Scharnhorst) with the stone sculpture Die Heide aus Lüneburg
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  In Luttern, Lower Saxony

• List of rivers of Lower Saxony