We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The cloud is centered at a Galactic longitude of l - 40 and extends above and below the Galactic plane by at least 50. Given its off-centeredness and height, it is unlikely that the Hercules-Aquila cloud is related to the bulge or thick disk. More likely, this is a new structural component of the Galaxy that passes through the disk. The cloud stretches 680 in longitude. Its heliocentric distance lies between 10 and 20 kpc so that the extent of the cloud in projection is 620 kpc by 615 kpc. It has an absolute magnitude of Mu = -13, and its stellar population appears to be comparable to, but somewhat more metal-rich than, M92.