Lydiard Millicent is a village and civil parish in Wiltshire, England, about 3+1⁄2 miles (6 km) west of the centre of Swindon. The parish contains the hamlets of Lydiard Green, Lydiard Plain, Greatfield and Green Hill; in the northeast the parish extends to Common Platt, which is now contiguous with the Peatmoor area of Swindon. The Woodbridge Brook rises near the village.