Utricularia leptorhyncha is a terrestrial bladderwort endemic to the Top End of the Northern Territory, Australia.

Utricularia leptorhyncha is a small bladderwort with flowers around 1-1.5cm in width. The lower corolla lip has three lobes arranged in a ‘T’ formation. The upper corolla lip is small and upright. The palate at the centre of the flower has shallow white ridges around an opening that leads to the inside of the bloom. The front of the flower is purple with darker streaks towards the center. The upper corolla lip and backs of the blooms are white.

The species is mainly known from the Top End in the Northern Territory. It is usually found in wet drainage lines, usually near the boundary of tall spear grasses, where water begins to seep out of the ground. It seems to have a slight preference for dark, loamy soils. The plant mainly blooms towards the end of the wet season.

Utricularia leptorhyncha is often confused with U. disjuncta, sharing an identical colouration and similar corolla shape. The two species are readily distinguished by examining the palate at the centre of the bloom. The palate of U. leptorhyncha has shallow white ridges that surround an obvious hole leading inside the flower. The palate of U. disjuncta has two toothed ridges and the opening of the flower is obscured.