A trivet is an object placed between a serving dish or bowl, and a dining table, usually to protect the table from heat damage. Whilst tri- means three, and -vet comes from -ped, meaning 'foot' / 'feet', trivets often have four 'feet', and some trivets, including many wooden trivets, have no 'feet' at all.

Trivet also refers to a tripod used to elevate pots from the coals of an open fire (the word trivet itself ultimately comes from Latin tripes meaning "tripod"). Metal trivets are often tripod-like structures with three legs to support the trivet horizontally to hold the dish or pot above the table surface. These are often included with modern non-electric pressure cookers. A trivet may often contain a receptacle for a candle that can be lit to keep food warm.

A three-legged design can reduce wobbling on uneven surfaces.

Modern trivets are made from metal, wood, ceramic, fabric, silicone or cork.

When roasting any meat in an oven, trivet racks - which typically fit into roasting pans - are often used to enable the meat joint to be held above the direct heat of the roasting pan and allow the juices of the joint to drip into the roasting pan for the subsequent making of gravy. A trivet can also be made of freshly cut carrot, celery and onion. This not only raises the meat, it has the further advantage of providing a gravy-friendly liquid when the vegetables and juices are sieved at the end of cooking.