Question: The Haverhill Historical Society Historic District is located in what county?

Context paragraphs:
Schmucker Hall: Schmucker Hall is an American Civil War site listed on the National Register of Historic Places in Adams County, Pennsylvania, that was constructed as the original Gettysburg Theological Seminary building.  Used as both a Union and Confederate hospital during the 1863 Battle of Gettysburg, the facility served as the seminary's main building from 1832 to 1895, then as a dedicated dormitory for students until 1951.  In 1960, it was leased by the Adams County Historical Society.  Beginning in 2006, the Historical Society, along with the Seminary Seminary Ridge Historic Preservation Foundation, rehabilitated the building for adaptive reuse as the Seminary Ridge Museum www.seminaryridgemuseum.org .  The Adams County Historical Society moved into the nearby Wolf House on the seminary campus preceding the renovation.  In 2013, on the 150th anniversary of the battle, the Seminary, the Adams County Historical Society and the Seminary Ridge Historic Preservation Foundation opened the building as the Seminary Ridge Museum.  The Museum houses displays about many different aspects of the battle, the seminary, the town, and the civil war, and the struggle among faith groups over slavery, as well as offering tours of the cupola.  The exhibit and museum have earned international, national and regional awards and the rehabilitation achieved LEED Certification in 2013.

Brown County Courthouse Historic District: Brown County Courthouse Historic District is a historic courthouse and national historic district located at Nashville, Brown County, Indiana.  It encompasses three contributing buildings: the courthouse, Old Log Jail, and the Historical Society Museum Building.  The Brown County Courthouse was built in 1873-1874, and is a two-story, Greek Revival style brick building.  It has a gable roof and two-tiered, flat-roofed frame tower.  The Old Log Jail was built in 1879, and is a small two-story log building.  It measures 12 feet by 20 feet, and was used as a jail until 1922.  The Historical Society Museum Building, or Brown County Community Building, is a two-story, rectangular log building.  It was moved to its present location in 1936-1937.  The Works Progress Administration funded the reconstruction and remodeling of the building.

Haverhill Corner Historic District: The Haverhill Corner Historic District encompasses the early civic center of Haverhill, New Hampshire, United States.  The district is focused on the junction of New Hampshire Route 10 and Court Street, which was historically a major through route.  Court Street is flanked at the junction by a pair of large grassy common areas which are bounded by School Street and Route 10.  Buildings, predominantly Federal in character and built in the late 18th and early 19th centuries, are arrayed around these commons, and historic buildings line Route 10 and Court Street for a short distance away from the commons.  Prominent buildings in the district include the 1827 Federal-style First Congregational Church, the 1840 former courthouse that now houses the public library and local historical society, and the Romanesque Revival 1897 Haverhill Academy Junior High School building.  The area declined in importance after the railroad bypassed it, resulting in the gradual relocation of civic functions to the Woodsville area.

Rensselaer County Historical Society: The Rensselaer County Historical Society (RCHS) is a non-profit, historical society and museum, to promote the study of the history of the Rensselaer County, NY.  RCHS was founded in 1927, and originally operated out of a single room in the Troy Public Library, collecting manuscripts and published materials related to the county's history.  It is located in the Central Troy Historic District, in Troy, NY.  The Rensselaer County Historical Society operates a museum, and offers public programs from its location at 57 Second Street, Troy, NY.

Haverhill Historical Society Historic District: The Haverhill Historical Society Historic District encompasses a collection of historic buildings that have been accumulated by the Haverhill Historical Society at 240 Water Street in Haverhill, Massachusetts.  The district, which was listed on the National Register of Historic Places in 2005, has at its core a Federal style farmhouse that was donated (along with the surrounding parcel of land) to the society in 1903.  It includes about 1.5 acre of land between John Ward Avenue and the Merrimack River, on which stand four buildings; there is also an archeological site, the remains of a late 17th-century homesite, on the property.

Haverhill, Massachusetts: Haverhill ( ) is a city in Essex County, Massachusetts, United States.  The population was 60,879 at the 2010 census.

Working Girls' Vacation Society Historic District: The Working Girls' Vacation Society Historic District is a 27 acre historic district in East Haddam, Connecticut that was listed on the National Register of Historic Places in 1994.  It is significant by dint of the properties having been owned, during 1892-1945, by the Working Girls' Vacation Society of New York City, and used as a summer retreat for working women from the city.

Historical Society of Central Florida: The Historical Society of Central Florida, formerly the Orange County Historical Society, is a historical society located in Orlando, Florida, United States.  Located at the Orange County Regional History Center in the old Orange County Courthouse, the Historical Society collects and preserves the regional history of Central Florida.

Haverhill, New Hampshire: Haverhill is a town in Grafton County, New Hampshire, United States.  The population was 4,697 at the 2010 census.  Haverhill includes the villages of Woodsville, Pike, and North Haverhill, the historic town center at Haverhill Corner, and the district of Mountain Lakes.  Located here are Bedell Bridge State Park, Black Mountain State Forest, Kinder Memorial Forest, and Oliverian Valley Wildlife Preserve.  It is home to the annual North Haverhill Fair, and to a branch of the New Hampshire Community Technical Colleges.  The village of North Haverhill is the county seat of Grafton County.

Buttonwoods Museum: The Buttonwoods Museum is a museum operated by the Haverhill Historical Society in Haverhill, Massachusetts, in the Merrimack Valley.

Supporting paragraphs: Haverhill Historical Society Historic District Haverhill, Massachusetts
Answer: Essex County