Question: Harry S. Truman Historic District is in what county?
Context: The Caldwell County Courthouse Historic District is a historic district located in Lockhart, Texas, the seat of Caldwell County.  The historic district encompasses 67 buildings on 250 acre across downtown Lockhart.  One building included in the historic district, the Emmanuel Episcopal Church, was previously listed on the National Register of Historic Places in 1974.  The historic district was added to the National Register of Historic Places on January 3, 1978. The Rogersville Historic District is a historic district in Rogersville, Tennessee, the county seat of Hawkins County.  It is both a local historic district and a National Register of Historic Places historic district. The Harry S. Truman Historic District is a National Historic Landmark District encompassing sites closely associated with US President Harry S. Truman in Independence, Missouri.  It includes the Truman Home at 219 North Delaware, Truman's home for much of his adult life and now a centerpiece of the Harry S. Truman National Historic Site, and the Truman Presidential Library.  The district was listed on the National Register of Historic Places in 1971, and was designated a National Historic Landmark in 1974.  When first listed, the district included only the two buildings and a corridor joining them.  It was substantially enlarged in 2011 to include more sites and the environment in which Truman operated while living in Independence. The Fifth and Main Historic District is a collection of adjoining structures and national historic district located on the northeast corner of the intersection of Main and Fifth streets in Joplin, Jasper County, Missouri, United States.  This historic district consists of three early 20th century structures: the Christman Building, the Christman Building Annex and the Paramount Building.  The Fifth and Main Historic District was added to the National Register of Historic Places in 2006.  In 2008, it was encompassed by the Joplin Downtown Historic District. The Thomasville Historic District is a historic district in the city of Thomasville, Alabama.  Thomasville was founded in 1888, along the then newly constructed railroad between Mobile and Selma.  The city's business district suffered a major fire in 1899, with only one brick building surviving.  The historic district features examples of early commercial, Queen Anne, Colonial Revival, Craftsman, and regional vernacular architecture.  The historic district is centered on the old business district and is roughly bounded by U.S. Highway 43, West Front Street, Wilson Street, and West Third Street.  It is a part of the Clarke County Multiple Property Submission and was placed on the National Register of Historic Places on February 12, 1999. The Jacobs Block, also known as the National Clothing House, is an 1870s historic building encompassing addresses in the 400 Block of Washington Street and the 100 Block of North Fourth Street in Oregon, Illinois.  The Jacobs Block is part of Ogle County's only nationally designated historic district.  The area, known as the Oregon Commercial Historic District, was added to the National Register of Historic Places in August 2006.  The building, listed as a contributing structure to the historic district, is the Oregon Historic District's largest. Independence is the fifth-largest city in the state of Missouri.  It lies within Jackson County, of which it is the county seat.  Independence is a satellite city of Kansas City, Missouri, and is part of the Kansas City metropolitan area.  In 2010, it had a total population of 116,830. Elmwood Historic District–West is a national historic district located at Buffalo, Erie County, New York.  The district encompasses 1,971 contributing buildings, 4 contributing structures, and 13 contributing objects in the Elmwood Village neighborhood of Buffalo.  It is built around the Buffalo Parks and Parkways system bounded on the north by Delaware Park, Forest Lawn Cemetery, and the former Buffalo State Asylum, on the south by the Allentown Historic District, and on the east by the Elmwood Historic District–East.  This predominantly residential district developed between about 1867 and 1941, and includes notable examples of Queen Anne, Shingle Style, Colonial Revival, Tudor Revival, and American Craftsman style architecture.  The district contains one of the most intact collections of built resources from turn of the 20th century in the city of Buffalo and western New York State.  Located in the district are six previously listed contributing resources including the Richmond Avenue Methodist-Episcopal Church and the Buffalo Tennis and Squash Club.  Other notable building include the H.C. Gerber House (1908), the Fred Dullard House (1910), the William H. Scott House (1904), St. John’s-Grace Episcopal Church designed by Bertram Grosvenor Goodhue (1925–26), Davidson House (1885), former Jehle Grocery Store and Residence (c. 1886, 1899), St. Luke’s Episcopal Church (now Symphony Bible Church, 1886, 1893), Temple Beth El (now Greater Emmanuel Temple Church, Inc., 1910-1911), Richmond Avenue Church of Christ (now Bryant Parish Condominiums (c. 1885-1887), and Pilgrim-St.  Luke’s United Church of Christ (1911). Elmwood Historic District–East is a national historic district located at Buffalo, Erie County, New York.  The district encompasses 2,405 contributing buildings, 31 contributing structures, and 14 contributing objects in the Elmwood Village neighborhood of Buffalo.  It is bounded on the north by Delaware Park, Forest Lawn Cemetery, and the former Buffalo State Asylum, on the south by the Allentown Historic District, and on the west by the Elmwood Historic District–West.  This predominantly residential district developed between about 1867 and 1965, and includes notable examples of Queen Anne, Shingle Style, Colonial Revival, Tudor Revival, and American Craftsman style architecture.  The district contains one of the most intact collections of built resources from turn of the 20th century in the city of Buffalo and western New York State.  Located in the district are 17 previously listed contributing resources including the Buffalo Seminary, Garret Club, James and Fanny How House, Edgar W. Howell House, Edwin M. and Emily S. Johnston House, Col. William Kelly House, Lafayette Avenue Presbyterian Church, Parke Apartments, and the Unitarian Universalist Church of Buffalo.  Other notable building include the Frank Lloyd Wright designed William R. Heath House (1904-1905), Herbert H. Hewitt House (c. 1898), School 56 (1910-1911), the Harlow House (c. 1892), A. Conger Goodyear house (c. 1908), Alexander Main Curtiss House (now the Ronald McDonald House, 1895), Nardin Academy campus (c. 1914), and Coatsworth House (1897). Avery Street Historic District, is a national historic district located at Parkersburg, Wood County, West Virginia.  It is to the east of the Julia-Ann Square Historic District and south of the Parkersburg High School-Washington Avenue Historic District.  Primarily residential, it encompasses 109 acres and includes churches, a school, and a small commercial area.  Built as Parkersburg's first "suburb" in the late-19th and early-20th century in popular architectural style such as Colonial Revival and Queen Anne, the district exhibits 12 distinctive types of Historic architecture.  There are 358 contributing buildings, 59 of which are considered to be pivotal.  U.S. Senator Johnson N. Camden (1826-1908) owned most of the land now included in the district.  Located in the district are the separately listed Parkersburg Women's Club and the First Presbyterian Church/Calvary Temple Evangelical Church.
Answer: Jackson County