Rock Spring Farm is a historic home located at Leesburg, Loudoun County, Virginia. The original section of the house was built about 1826, with wing and one-story addition built about 1906, and hyphen in 1980 to connect to the original brick kitchen. It consists of a -story, four-bay, brick main block in the Federal style with a two-story rear ell and flanking wings. The house was updated near the turn of the 20th century with Colonial Revival-style details. Also on the property are a contributing spring house, smokehouse, barn, dairy, silo, tractor shed, and stable. and Accompanying photo
It was listed on the National Register of Historic Places in 2002.
It housed a dairy operation until 1977 and served as Leesburg's main source of water until the 1980s; it ceased to be a working farm in 2025.
In March 2026, the City of Leesburg narrowly approved a $5.78 million purchase of the farm from Jack Cook following the death of his wife, Agnes diZerega Cook, who had hoped that it would become parkland.
Vice Mayor Todd Cimino-Johnson opposed the purchase, stating that the town had agreed to pay "double what the appraisal says."
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