The Ring Tailed Lemur is an omnivore, consumes fruits and leaves, tamarind tree in particular.

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"The Ring-tailed Lemur is an opportunistic omnivore primarily eating fruits and leaves, particularly those of the tamarind tree (Tamarindus indica), known natively as kily. When available, tamarind makes up as much as 50% of the diet, especially during the dry, winter season.18 The Ring-tailed Lemur eats from as many as three dozen different plant species, and its diet includes flowers, herbs, bark and sap. It has been observed eating decayed wood, earth, spider webs, insect cocoons, arthropods (spiders, caterpillars, cicadas and grasshoppers) and small vertebrates (birds and chameleons)."

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In their own habitat ringed tail lemurs eat ripe fruits, leaves, leaf stems, flowers, flower stems, exudates, spiders, spider webs, caterpillars, cicadas, insect cocoons, birds, chameleons, cicadas, grasshoppers, and even dirt from termite mounds (Oda 1996; Sauther et al. 1999; Jolly 2003). One of the most important food sources for ring-tailed lemurs is the tamarind tree (Tamarindus indica) which not only is abundant in gallery and more open forests away from rivers, but which produces fruits and leaves at alternating times of the year, providing a reliable, year-round food source for the lemurs (Jolly et al. 2002; Mertl-Millhollen et al. 2003). Tamarinds can provide up to 50% of the total food consumed during some times of the year and are considered a keystone resource for ring-tailed lemurs (Sauther 1998; Jolly 2003). Ring-tailed lemurs are able to obtain water from succulent plants including aloe and prickly pear cactus as well as from dew and water that accumulates in crevices such as tree holes (Sauther et al. 1999; Jolly 2003). Vegetation availability is strictly linked to rainfall. During the rainy season, from roughly October through April, fruit and young leaves become available to ring-tailed lemurs, the tamarind tree is one of the only sources of fruit (Sauther 1998). Flower availability peaks before the start of the rainy season and is another important food source. Throughout the dry season, even mature leaves can be scarce and ring-tailed lemurs eat dry, desiccated leaves, which are more difficult to digest. During this time of year, young leaves are found only on a few tree or shrub species and are distributed patchily.

In captivitiy ringed tailed Lemurs are fed a mixture of fruits and vegetables and leaf-eater biscuits, once a day.

The Ring-tailed Lemur is an opportunistic omnivore primarily eating fruits and leaves, particularly those of the tamarind tree, known natively as kily. When available, tamarind makes up as much as 50% of the diet, especially during the dry, winter season. The Ring-tailed Lemur eats from as many as three dozen different plant species, and its diet includes flowers, herbs, bark and sap. It has been observed eating decayed wood, earth, spider webs, insect cocoons, arthropods (spiders, caterpillars, cicadas and grasshoppers) and small vertebrates (birds and chameleons). During the dry season it becomes increasingly opportunistic.