Question: Maine State Route 206 is located entirely in what county?

Context paragraphs:
Ohio State Route 206: State Route 206 (SR 206) is a north–south state highway in central Ohio, a U.S. state.  The southern terminus of State Route 206 is at a T-intersection with State Route 541 approximately 6.50 mi east of the unincorporated community of Bladensburg.  Its northern terminus is 3.50 mi east of the village of Brinkhaven at its junction with U.S. Route 62.

Washington State Route 206: State Route 206 (SR 206, named the Mount Spokane Park Drive) is a 15.30 mi state highway serving Mount Spokane State Park in the U.S. state of Washington.  Beginning at U.S. Route 2 (US 2) north of Mead, the highway travels east through unincorporated Spokane County and northeast into the Selkirk Mountains, ending at the entrance to Mount Spokane State Park.  The roadway, first constructed in the 1890s and reconstructed several times, was designated as SR 206 during the 1964 highway renumbering.

Nevada State Route 206: State Route 206 (SR 206) is a state highway in Douglas County, Nevada, United States.  It runs northwest from State Route 88 near the California state line along Foothill Road to Genoa, and then turns east on Genoa Lane to end at U.S. Route 395.

Farmington Falls, Maine: Farmington Falls is an unincorporated village in the town of Farmington, Franklin County, Maine, United States.  The community is located along the Sandy River 5 mi southeast of the village of Farmington; U.S. Route 2, Maine State Route 27, Maine State Route 41, and Maine State Route 156 all pass through the village.  Farmington Falls has a post office with ZIP code 04940.

New Jersey Route 170: Route 170 was a short, 0.79 mi long state highway in Burlington County, New Jersey.  The route was a former alignment of U.S. Route 206 and New Jersey Route 39 in the downtown portions of Mansfield Township and Columbus.  Route 170 began at an intersection with U.S. Route 206 in Mansfield Township, headed northward along Atlantic Avenue and New York Avenue in Columbus before merging with U.S. Route 206 at a wye connection further north.

Oregon Route 206: Oregon Route 206 is an Oregon state highway located in the north-central part of the state.  It runs from Interstate 84 at Celilo Village to a junction with Oregon Route 74 and Oregon Route 207 in Heppner.  Aside from Interstate 84, Oregon Route 206 is the main east–west highway in Gilliam County and provides access from the Portland metropolitan area to the John Day area.  The highway is known as the Wasco-Heppner Highway No. 300 (see Oregon highways and routes), except for the section between Celilo Village and Wasco, which is called the Celilo-Wasco Highway No. 301.

Belle Mead station: Belle Mead station is a train station along the former New Jersey Transit West Trenton Line in the Belle Mead section of Montgomery Township, in Somerset County, New Jersey, United States.  The current station was built by the Reading Railroad in 1913.  This replaced the older station which was built in the late 19th century.  The current Belle Mead station was closed in 1981 and is still standing.  New Jersey Transit may reopen the station as part of the proposed revival of the West Trenton Line.  This station was expected to have the second largest ridership on the branch with 290 daily passengers.  If the station were to be reopened, two small station buildings would be renovated.  Commuter parking would possibly be located on the eastside of the right-of-way with access from Route 206 with 300 parking spaces.  The intersection of Township Line Road and Route 206 would be improved along with replacement of the adjacent Route 206 bridge over the railroad.

New Hampshire Route 236: New Hampshire Route 236 (abbreviated NH 236) is a 2.589 mi long east–west state highway located entirely in the city of Somersworth, New Hampshire.  Its western terminus is at an intersection with New Hampshire Route 108 west of downtown.  Its eastern terminus is at the Maine state line, where the highway crosses the border into Berwick, Maine overlapped with New Hampshire Route 9.  The roadway continues into Maine as Maine State Route 9.

Maine State Route 206: State Route 206 (SR 206) is a short state route in the U.S. state of Maine.  It is located entirely in Washington and runs from SR 17 to SR 105.

Washington, Maine: Washington, officially the Town of Washington, is a town in Knox County, Maine.  The population was 1,527 at the 2010 United States Census.

Supporting paragraphs: Maine State Route 206 Washington, Maine
Answer: Knox County