The tudong (Malay: tudung, Jawi: تودوڠ) is a style of headscarf, worn as interpretation of the Islamic hijab, prevalent amongst many Muslim women in the Malay-speaking world; Indonesia, Brunei, Malaysia, and Singapore. Today, the tudong forms part of the standard dress code for many offices in Indonesia and Malaysia, as well as in school uniforms and formal occasions. Though initially considered a conservative form of dress, it is worn today by most moderate Muslim women in Malaysia and Indonesia.

The term tudong or tudung is a Malay/Indonesian word, literally meaning the noun "cover", which is commonly translated as "veil" or "headscarf" in English. Tudong is usually used to describe the headscarf in Malaysia, while in Indonesia it is more common to call the tudong the kerudung or perhaps the jilbab. However, in recent years many speakers of Malay/Indonesian have simply began referring to the tudong/tudung/kerudung as hijab, a loanword from Arabic that reflects the growing Arabic cultural influence on the practice of Islam in Southeast Asia.

In the Philippines, tudong or talukbong (Tagalog) refers to the standard hijab as worn by Muslim women. The term is interchangeable with the standard Arabic term hijab (alternatively spelled hidyab in Filipino), and usually takes the form of the headwrap, visor-type, al-amira, khimar or niqab (face veil) types of veiling.

Another term, kombong (alternative spelling: combong), refers to an older style of headwrap hijab worn by Maranao, Iranun, and Maguindanao women with a semi-translucent shayla or malong (sarong) worn over the chest and drawn over the kombong for prayers, or for additional veiling when out of the house or familiar areas. Tudong, talukbong or kombong are native Austronesian words and cognates with Malay and Indonesian tudung or kerudung for the hijab. They are commonly used in languages spoken by Muslim Filipinos or Bangsamoros, including the three Danao languages of Maranao, Maguindanao and Iranun, Kaagan, and Tausug, Yakan, and Sinama (Bajau). In Tagalog or Bisaya, the standard Arabic word of hijab, the native term talukbong, or the English terms of "headscarf", "veil", or "scarf" are commonly used by non-Muslims to refer to the tudong instead.

The tudong covers the hair, ears, and neck with a sewn-in curved visor, leaving only the face exposed. The tudong is typically colourful, sporting bright colours such as pinks, yellows, blues, and greens, and is of a square Arabic-style hijab shape, though the tudung is much more colourful than hijab in the Middle East.

In both Indonesia and Malaysia a major fashion industry has blossomed around the tudong, with a wide variety of colours and styles as well as the use of buttoned raincoats such as the jilbab, long dresses, and accessories to complement the tudong. Many women also simply wear it with Western-style jeans and T-shirts. Make-up is also commonly worn alongside the tudong.

The growth of social media has allowed online tudung outlets such as Naelofa Hijab, Fareeda Tudung, SA Elegance, JelitaSARA, and Ariani to market the tudong to young Muslim women in the Malay-speaking world in an effort to remain both fashion-conscious and comply with Islamic modesty. Many women attempt to emulate the latest tudong styles seen on celebrities in the Malay-speaking world.

The tudong, despite its popularity in the Malay-speaking world, is a recent phenomenon rather than a traditional one. Its origins lie in the mid-to-late 1970s, when the Islamic revival, fuelled by the rise of “Petro-Islam” and the buildup to the Iranian Revolution, began to emerge in the Middle East.