The population of the Upper Swansea Valley changed throughout the Victorian period as industries did well or faded, and people moved about to earn a living.
This information was recorded in the censuses which were taken every ten years. Men were employed to travel round the district recording who lived in which house and what they did.
The population figures are taken from these records.

The area was divided into parishes (shown on the map above) and the population figures usually refer to these.
Choose from the links below to view population graphs for the Victorian period.

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