Dinuguan (Tagalog pronunciation: [dɪnʊgʊˈʔan]) is a Filipino savory stew usually of pork offal (typically lungs, kidneys, intestines, ears, heart and snout) and/or meat simmered in a rich, spicy dark gravy of pig blood, garlic, chili (most often siling haba), and vinegar.

The most popular term, dinuguan, and other regional naming variants come from their respective words for "blood" (e.g., "dugo" in Tagalog means "blood," hence "dinuguan" as "to be stewed with blood" or "bloody soup"). Possible English translations include pork blood stew or blood pudding stew.

Dinuguan is also called sinugaok in Batangas, zinagan in Ibanag, twik in Itawis, tid-tad in Kapampangan, dinardaraan in Ilocano, dugo-dugo in Cebuano, rugodugo in Waray, sampayna or champayna in Northern Mindanao, and tinumis in Bulacan and Nueva Ecija. A nickname for this dish is "chocolate meat".

Dinuguan is also found in the Marianas Islands, believed to have been introduced to the islands by Filipino immigrants, where it is known locally as fritada.

This dish is rather similar to the Polish soup czernina or an even more ancient Spartan dish known as melas zomos (black soup) whose primary ingredients were pork, vinegar and blood.

Dinuguan can also be served without using any offal, using only choice cuts of pork. In Batangas, this version is known as sinungaok. It can also be made from beef and chicken meat, the latter being known as dinuguang manok ('chicken dinuguan'). Dinuguan is usually served with white rice or a Philippine rice cake called puto. The Northern Luzon versions of the dish, namely the Ilocano dinardaraan and the Ibanag zinagan are often drier with toppings of deep-fried pork intestine cracklings. The Itawes of Cagayan also have a pork-based version that has larger meat chunks and more fat, which they call twik.

The most important ingredient of the dinuguan recipe, pig's blood, is used in many other Asian cuisines either as coagulated blood acting as a meat extender or as a mixture for the broth itself. Pork dinuguan is the latter.

The dish is not consumed by religious groups that have dietary laws prohibiting the consumption of blood, most notably the indigenous Iglesia ni Cristo, Jehovah's Witnesses, Members Church of God International, Seventh-day Adventists, Muslims and Jews.