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 Joseph H. Pierce of the firm Pierce and 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. The Armory was owned by the City of Elmira and was used as an annex to City Hall until the facade collapsed on March 10, 2006.