Muṟukku (Tamil: முறுக்கு, romanised: muṟukku, lit. 'twisting') is a savoury, crunchy snack originating from the Indian subcontinent. In India, murukku is especially common in the states of Tamil Nadu, Telangana, Andhra Pradesh, Karnataka, Kerala, Chhattisgarh and Odisha. It is called murkulu in Telangana, janthikalu in Andhra Pradesh and mudku/murku in Odisha. Chakli is a similar Indian dish, typically made with an additional ingredient, chickpea flour.

It is also common in countries with substantial Indian and Sri Lankan diaspora communities, including Singapore, Fiji, Malaysia, and Myanmar. Called sagalay gway (စာကလေးခွေ; lit. 'baby sparrow coils') in Burmese, it is a common snack and is used as a topping for a regional dish called Dawei mont di.

The name muṟukku "twisting" in Tamil refers to its shape. Other names of the dish include Kannada: ಚಕ್ಕುಲಿ, romanised: cakkuli, Odia: ଦାନ୍ତକଲି, romanised: dāntakali, Marathi: चकली, romanised: cakalī, Telugu: చక్రాలు, romanised: cakrālu or murukulu or జంతికలు jantikalu, and Konkani: chakri or chakkuli.

Murukku is typically made from rice flour and urad dal flour. The flours are mixed with water, salt, chili powder, asafoetida and either sesame seeds or cumin seeds. The mix is kneaded into a dough, which is shaped into spiral or coil shapes either by hand or extruded using a mould. The spirals are then deep-fried in vegetable oil.

The dish has many variations, resulting from the types and proportions of flours used. Mullu muṟukku "thorn muṟukku" has an uneven texture that gives it an extra crunch. The Kai murukku "hand murukku") is made by hand using a stiffer dough. Ribbon pakoda muṟukku is another ribbon-shaped variety of the snack. Āṭṭaiyāmpaṭṭi kai muṟukku, a town in Tamil Nadu, is known for its unique variety of murukkus, known as Maṇappāṟai muṟukku. This gained popularity because of Krishnan Iyer, who prepared and sold this first in Maṇappāṟai. In 2010, the Tamil Nadu government applied for a geographical indication tag for Manapparai Murukku.