Lough Ennell (Irish: Loch Ainninn)[4] is a lake near the town of Mullingar, County Westmeath, Ireland.

The loughside has a caravan and camping park, boat hire facilities, hotels and restaurants and a fishery.

Belvedere House is also an attraction and is managed by the County Council, it hosts a number of sporting and cultural events annually such as concerts and triathlons.

[6] In recent times it appears that stocks of both game and coarse fish in the lake have been declining.

In 2019, the Environmental Protection Agency declared the water quality at Lilliput beach on the Lough as "poor".