Disclosed are a grain-oriented electrical steel sheet exhibiting low iron loss and low noise properties when incorporated in a transformer, and a production method therefor. The steel sheet has strain regions locally present in a surface layer thereof and formed to extend in a direction transverse to a rolling direction at periodic interval s (mm) in the rolling direction. Each strain region has a closure domain region formed continuously over 200 mm in a width direction and whose width in the rolling direction varies periodically on a steel sheet surface. Each closure domain region satisfies: W max / W min = 1.2 or more and less than 2.5, where W max and W min respectively denote a maximum width and a minimum width on the steel sheet surface as measured in the rolling direction; W ave being 80 µm or more, where W ave denotes an average width on the steel sheet surface as measured in the rolling direction; D being 32 µm or more, where D denotes a maximum depth as measured in the sheet thickness direction; and ( W ave * D )/ s being 0.0007 mm or more and 0.0016 mm or less.