Loganlea Reservoir is a small reservoir tucked into the Pentland Hills of Midlothian, Scotland.

It was constructed by the Edinburgh Water Company under an 1847 Act of Parliament and completed in 1851, with a containing dam standing 59 feet (18 m) high and a capacity of around 118 million imperial gallons.

The Logan Burn connects it to the neighbouring Glencorse Reservoir. The water is owned by Scottish Water. The reservoir is a popular fishing destination, particularly for anglers targeting stocked rainbow trout, with brown trout also present.

It sits within Pentland Hills Regional Park, where access rights exist for non-motorised watercraft such as kayaks and stand-up paddleboards, though vessels must be portaged in as no reservoir in the park is vehicle-accessible.

Visitors should be aware that fishing activity is heavy between March and November.