Plainfield is a city in Union County, New Jersey, situated in the Raritan Valley region and functioning as both a regional hub for central New Jersey and a bedroom community of the New York metropolitan area. Known as "The Queen City," it lies roughly 20 miles southwest of Manhattan, with a population of about 54,500. The city's origins date to 1847, when it was formed as a township from portions of Westfield Township while the area was still part of Essex County. Growth accelerated with the arrival of the railroad, which made Plainfield an early commuter suburb and later a center of commerce, industry, and civic life. Its architecture preserves that layered history, from grand Victorian-era homes in districts like Van Wyck to the commercial blocks and institutional buildings of the downtown core. Today Plainfield is a dense, walkable city with a diverse population and an active downtown anchored by cultural, educational, and transit institutions. Union College, a community college, maintains a downtown campus, and the duCret School of Art continues a long local arts tradition. The city's historic districts and varied housing stock — from large single-family homes to multi-family buildings and apartment houses — give it a distinctly urban-suburban mix. Transportation is a defining asset. NJ Transit's Raritan Valley Line serves the city at two stations, offering a direct rail connection toward Newark and New York. Route 28 runs through the city, and U.S. Route 22, Interstate 78, and Interstate 287 are nearby, providing highway access across the region. Express bus service to Manhattan complements the rail line. Plainfield's role as a Queen City — a center of government, education, shopping, and transit for the surrounding towns — continues to shape its identity. Its neighborhoods range from leafy residential streets near the historic district to denser, transit-oriented blocks around the train stations, making it one of Union County's most established and historically significant communities.