The Welsh otherSettlement of Castle-upon-Alun is located within the county of South Glamorgan and has a population of approximately 1,200.
Castle-upon-Alun is governed by Bro Morgannwg - the Vale of Glamorgan council.
Castle-upon-Alun is policed by South Wales Police
Castle-upon-Alun is within the Parliamentary Constituency of Vale of Glamorgan
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