Originally a farm called Tŷ Isaf, the village came about as a need for housing for the local steel mill and chemical works workforces. Most houses were built in 1920 - 1925.
From the late 1800s there were a number of heavy industries, (steel and chemical), based alongside the river Ebbw. The name Pontymister is said to have come about as the staff were paid from an office built alongside the bridge that connected Ty Isaf to Ochrwyth. The bridge became known as the master's bridge, Pont Y Mister.
Many local pubs still bare the names of steel making; the Rolling Mill, the Forge and Hammer, etc. Although the Forge hammer is now  an Indian restaurant - The Tamarind.
- 'Development of Pontymister' on Risca Museum's website
- Old photos of Pontymister
- Pontymister and surrounding area on geograph.co.uk
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