Montgomery County Infirmary (Welsh: Ysbyty Sir Drefaldwyn) is a health facility in Llanfair Road, Newtown, Powys, Wales.

It is managed by the Powys Teaching Health Board.

The facility was established in a private house in 1868[1] and, after a major fund-raining campaign for a new building, moved into expanded facilities in Llanfair Road in 1911.

[2] It joined the National Health Service in 1948 and subsequently evolved to become a community hospital.

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