2+1⁄2 Beacon Street, also known as the former New Hampshire State Prison Warehouse, is a historic commercial building at 2+1⁄2 Beacon Street in Concord, New Hampshire. Built in 1860 and enlarged in 1868, it is the only major surviving element of New Hampshire's first state prison complex, which was mostly torn down in the 1890s. The building was listed on the National Register of Historic Places in 1984.