Question: The McCone Residence in Glendive, was listed on the National Register of Historic Places in 1988, located in which county located in the U.S. state of Montana, and the county seat is Glendive?

Context paragraphs:
Glendive City Water Filtration Plant: The Glendive City Water Filtration Plant, in Glendive, Montana, was built in 1917 after years of delays, after the city was founded in 1902.  Water was delivered in barrels to residences in Glendive until it was completed.  It was listed on the National Register of Historic Places in 1988.

Alabama Register of Landmarks and Heritage: The Alabama Register of Landmarks and Heritage, commonly referred to as the Alabama Register, is an official listing of buildings, sites, structures, objects, and districts deemed worthy of preservation in the U.S. state of Alabama.  These properties, which may be of national, state, and local significance, are designated by the Alabama Historical Commission.  The designation is honorary and carries no direct restrictions or incentives.  The register includes properties such as cemeteries, churches, moved properties, reconstructed properties, and properties at least 40 years old which may not normally qualify for listing in the National Register of Historic Places.  There are approximately 1421 properties and districts listed on the Alabama Register.  Of these, approximately 196 are also listed on the National Register of Historic Places and 5 are designated as National Historic Landmarks.

Lone Oaks: Lone Oaks, also known as the Benjamin Deyerle Place and Winsmere, is a Greek Revival mansion listed on both the National Register of Historic Places and the Virginia Landmarks Register in the Greater Deyerle neighborhood of the independent city of Roanoke, Virginia, U.S.A.  Located at 3402 Grandin Road Extension SW, Lone Oaks was completed in 1850 as the private residence of Benjamin Deyerle overlooking Mudlick Creek.  Today the home still stands, with the surrounding area now developed as single family home typical of those built during the 1970s-80s.  Today the home remains as a private residence.  The house is L-shaped with a single pediment Doric entrance portico, which has plain square pillars and fluted columns.  It became a Virginia Historic Landmark and was listed on the National Register of Historic Places in 1973.

McCone Residence: The McCone Residence in Glendive in Dawson County, Montana was listed on the National Register of Historic Places in 1988.

Blackstock Residence: The Blackstock Residence at 217 W. Towne in Glendive, Montana is a historic house that was built sometime between 1905 and 1910.  It was listed on the National Register of Historic Places in 1988.

U.S. Post Office (Glendive, Montana): The U.S. Post Office in Glendive in Dawson County, Montana was built in 1935 with elements of Colonial Revival style.  It was listed on the National Register of Historic Places in 1988, as part of a study of multiple historic resources in Glendive which also listed several others.

Dawson County, Montana: Dawson County is a county located in the U.S. state of Montana.  As of the 2010 census, the population was 8,966.  Its county seat is Glendive.

Tryon County, New York: Tryon County was a county in the colonial Province of New York in the British American colonies.  It was created from Albany County on March 24, 1772, and was named for William Tryon, the last provincial governor of New York.  The county's boundaries extended much further than any current county.  Its eastern boundary ran "from the Mohawk River to the Canada line, at a point near the old village of St. Regis and passing south to the Mohawk between Schenectady and Albany."  It extended north to the St. Lawrence River; its western boundary was the Treaty of Fort Stanwix's Line of Property, following the Unadilla River, Oneida Lake, Onondaga River and Oswego River to Lake Ontario, as the Iroquois Confederacy still controlled locations further west in the Indian Reserve.  Tryon County's seat was Johnstown, which is today the county seat of Fulton County.  The Tryon County Courthouse, built in 1772–1773, was listed on the National Register of Historic Places in 1972.  The Tryon County Jail, also built in 1772–1773, was listed on the National Register of Historic Places in 1981.

Northern Pacific Railroad Settling Tanks: The Northern Pacific Railroad Settling Tanks in Glendive, Montana were built in 1905 by the Northern Pacific Railroad.  The site was listed on the National Register of Historic Places in 1988.  The listing included two contributing buildings and two contributing structures.  It includes a caretaker's cottage built in about 1910.  The site has also been known as Glendive City Shops, as they have been repurposed as city maintenance facilities.

Sacred Heart Church (Glendive, Montana): The Sacred Heart Church at 316 W. Benham in Glendive, Montana is a Catholic church which was built during 1924-26.  It was listed on the National Register of Historic Places in 1988.

Supporting paragraphs: McCone Residence Dawson County, Montana
Answer: Dawson County