Sunnyvale is a town on the eastern edge of Dallas County, Texas, holding the distinction of being the easternmost incorporated city lying completely within the county. It was formed on February 26, 1953, when the rural communities of New Hope, Tripp, Hattersville, and Long Creek were incorporated as a single town. The name Sunnyvale was taken from a local school, and the community's origins as a cluster of small farm settlements continue to shape its character today. Historic reminders of that era remain, including the old New Hope School and the Tripp First Baptist Church, built in 1882. The town has grown steadily since incorporation. From a population near 1,000 by the late 1950s, Sunnyvale expanded through the late twentieth century and reached 7,893 residents by the 2020 census. That growth has brought newer residential development to the area, yet Sunnyvale has retained a semi-rural quality defined by larger lots and open space, setting it apart from the denser suburbs closer to Dallas. The median age of roughly 43 reflects a community of established households and families. Education is central to Sunnyvale's appeal. The Sunnyvale Independent School District is a single, self-contained system that serves the town, and its high school, opened in 2009, was rated exemplary by the Texas Education Agency that year. The district's strong reputation is a primary reason families choose the town, and the schools anchor much of the community's social and athletic life. Positioned between the Dallas metro and the more rural communities of eastern Dallas County, Sunnyvale offers a distinctive balance: acreage-style living and a small-town, historically rooted identity, combined with access to the employment and amenities of one of the nation's largest metropolitan areas. For those seeking space and a strong school system without leaving the Dallas region, Sunnyvale is a notable option.