The 30th Separate Company Armory, also known as the Elmira Armory, formerly located at 307 East Church Street in Elmira, New York, was built from 1886–1888. It was a contributing property of the Elmira Civic Historic District. The structure was designed by J. H. Pierce of the firm of Pierce & Bickford. Following decommissioning by the New York National Guard in the 1970s it was acquired by Chemung County and used as for offices and storage.