Ithaca Downtown Historic District is a national historic district located at Ithaca in Tompkins County, New York. The district consists of 64 contributing mostly commercial buildings. It is composed mainly of multi-story buildings with brick exteriors and flat or low-pitched roofs fronted by a variety of parapets set off by decorative cornices. The district include…Ithaca Downtown Historic District is a national historic district located at Ithaca in Tompkins County, New York. The district consists of 64 contributing mostly commercial buildings. It is composed mainly of multi-story buildings with brick exteriors and flat or low-pitched roofs fronted by a variety of parapets set off by decorative cornices. The district includes three separately listed properties: Clinton House, Clinton Hall, and the State Theater.