Farmersville is a city in Collin County, Texas, located northeast of Dallas at the crossing of U.S. Route 380 and State Highway 78. The northern portion of Lake Lavon, a major Corps of Engineers reservoir, lies nearby, and the town sits at the eastern edge of the Dallas-Fort Worth metropolitan area's rapid growth along the U.S. 380 corridor. As of the 2020 census, the population was about 3,600. The community's history is rooted in agriculture. Settled in the mid-19th century, Farmersville was named for its residents' dominant occupation — farming — and the surrounding land produced onions, cotton, and corn, earning the town the nickname "Onion Capital of North Texas." Its public square was platted in the 1850s, and the community grew along the railroads that served Collin County's farm economy. The Farmersville Heritage Museum, housed in a former church building, preserves that past. Today Farmersville balances its small-town character with a growing role in the Dallas-Fort Worth metroplex. The historic downtown remains the civic and cultural center, while new residential construction follows U.S. 380 eastward as builders and buyers look beyond McKinney. Farmersville ISD, with about 2,200 students, serves the community, and Collin College provides higher-education access in the region. The city has also positioned land for future industrial development along the Kansas City Southern Railway. For homebuyers, Farmersville offers a quieter, lower-cost entry point to Collin County, with older in-town homes, new construction on larger lots, and rural acreage all available. It appeals to families and commuters seeking small-town life with access to McKinney, the U.S. 380 corridor, and the broader Dallas-Fort Worth economy.