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Grade–Ruan civil parish encompasses part of Goonhilly Downs and the major settlements are Ruan Minor, St Ruan and Cadgwith. The parish was formed in 1934 because falling population necessitated merging the ecclesiastical parishes of Grade, Ruan Major and Ruan Minor. All three were in the Deanery and Hundred of Kerrier. Formerly, Cadgwith was partly in Grade parish and partly in Ruan Minor parish.
The population of Grade–Ruan has increased steadily; it was 677 in 1961, 835 in 1981 and 1070 in 2001. There is a school in the parish, Grade Ruan CE Primary School, which is situated in Ruan Minor.
Grade–Ruan lies within the Cornwall Area of Outstanding Natural Beauty (AONB). Almost a third of Cornwall has AONB designation, with the same status and protection as a National Park.
The parish churches of the three former parishes are St Grada at Grade, and the churches of Ruan Major and Ruan Minor, the latter two dedicated to St Rumonus. All three have towers though Ruan Minor Church tower is very small. Ruan Major Church was greatly altered by Edmund Sedding in 1867 and is now a ruin. The church of Ruan Major lay within the manor of Winnianton; its benefice was united with that of Landewednack in 1754. (There was in medieval times a chapel at Hendra.) The church of Ruan Minor also lay within the manor of Winnianton; it was a separate rectory in 1277. The church is a small mainly 15th century building and has a Norman piscina.