A Brunswick gown or Brunswick is a two-piece woman's gown of the mid-eighteenth century.
The Brunswick comprises a hip-length jacket with a high neckline and a hood, worn with a matching petticoat. The jacket sleeves consist of an upper sleeve with flounces at the elbow and a tight, wrist-length lower sleeve.
The Brunswick is one of several informal jacket-and-petticoat costumes popular in the later 18th century, derived from working class costume but made up in fine fabrics.