Danthonia unispicata is a species of grass known by the common name onespike oatgrass, or onespike danthonia.

It is sometimes treated as a variety of Danthonia californica, to which it is similar. It is native to western North America, where it grows in several types of habitat, including grassland and open areas in mountain forests.

It is a perennial bunchgrass growing in clumps 10 to 30 centimeters tall, with very hairy, rolled leaves. The inflorescence bears a single spikelet, or sometimes up to four spikelets.

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