Question: Elmira Heights is just north of what city that serves as the county seat of Cheming County, New York, US?

Context paragraphs:
Elmira Heights Village Hall: The Elmira Heights Village Hall, located in Elmira Heights, New York, was built in 1896.  It was designed by local architects J. H. Pierce and H. H. Bickford.  It is significant architecturally as an example of the Chateauesque or Northern Renaissance Revival style of the period.  It is significant historically for its role in local government.  The building was added to the National Register of Historic Places in 1982.

Elmira City School District: Elmira City School District is a school district in Elmira, New York.  The district serves the city of Elmira and the towns of Ashland, Baldwin, Erin, Pine City, Southport, and Wellsburg (including the hamlet of Lowman).

Elmira Heights Central School District: Elmira Heights Central School District is a school district in Elmira Heights, New York.

Elmira, New York: Elmira is a city in Chemung County, New York, US.  It is the principal city of the Elmira, New York Metropolitan Statistical Area, which encompasses Chemung County, New York.  The population was 29,200 at the 2010 census.  It is the county seat of Chemung County.

Elmira Heights, New York: Elmira Heights is a village in Chemung County, New York, United States.  The population was 4,097 at the 2010 census.  The village is primarily within the town of Horseheads, but part of the village is in the town of Elmira.  The village is a northern suburb of the city of Elmira.  It is part of the Elmira, New York Metropolitan Statistical Area.

30th Separate Company Armory: 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.

Elmira (town), New York: Elmira is a town in Chemung County, New York, United States, surrounding the city of Elmira on three sides.  The town's population was 6,934 at the 2010 census.  The town is in the south-central part of the county, in the Southern Tier of New York.  It is part of the Elmira Metropolitan Statistical Area.

West Elmira, New York: West Elmira is a suburban census-designated place (CDP) in Chemung County, New York, United States.  The population was 4,967 at the 2010 census.  It is adjacent to the city of Elmira on its west side.  West Elmira is in the southwest part of the town of Elmira.  It is part of the Elmira Metropolitan Statistical Area.

Elmira Correctional Facility: Elmira Correctional Facility, also known as "The Hill", is a maximum security state prison located in Chemung County, New York, in the City of Elmira.  It is operated by the New York State Department of Corrections and Community Supervision.  The supermax prison, Southport Correctional Facility, is located two miles away from Elmira.

Southside High School (Elmira, New York): Elmira High School, commonly referred to as EHS, is a high school in Elmira, New York, United States.  Was one of two public high schools operated by the Elmira City School District serving Chemung County, alongside Elmira Free Academy.  In 2014 Elmira City School District Elmira City School District renamed Southside High school "Elmira High School" Serving 10th, 11th and 12th Grades only.

Supporting paragraphs: Elmira Heights, New York Elmira, New York
Answer: Elmira, New York