Middleton-on-Leven is a hamlet and civil parish in the Hambleton District of North Yorkshire, England. At the 2011 Census, the population was less than 100, and was recorded with the civil parish of Rudby. In the 2001 census, the parish had a population of 97.

It is situated next to the River Leven, near the villages of Hilton (north), Seamer (east) Hutton Rudby (south). On the other side of the Leven is the town of Yarm at 4 miles (6.4 km) north-west and Kirklevington is west. Half a mile to the north-west at Castle Hill is the surviving motte of Castle Levington near the corresponding village.

Media related to Middleton-on-Leven at Wikimedia Commons