Entoloma quadratum is a species of agaric fungus in the family Entolomataceae. The fungus was originally described as Agaricus quadratus by Miles Joseph Berkeley and Moses Ashley Curtis in 1859; Egon Horak transferred it to Entoloma in 1976.

The mushroom is mostly orange. The cap grows up to 3.5 centimetres (1+1⁄2 in) wide and the stem reaches 10 cm (4 in) long. The spore print is pinkish-brown. It can resemble E. luteum, E. murrayi, and Hygrocybe conica.

It is found in Africa, Asia, Europe, and North America, under conifers and in moist soil.

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