Bedwellty (Welsh: Bedwellte) is a small village in Caerphilly County Borough in south Wales. The village stands on a ridge of high ground between the Rhymney and Sirhowy valleys. The village comprises St Sannan's parish church, public house and a few houses. The register of St Sannan's Church dates from 1624, which qualifies Bedwellty as an ancient parish. Historically the parish lay in the county of Monmouthshire, the hundred of Wentloog, Tredegar County Court District, the rural deanery of Bedwellty, the archdeaconry of Monmouth and the diocese of Llandaff. Several towns based on the iron industry expanded within the parish boundary, including from west to east, Rhymney, Tredegar and Ebbw Vale, which gradually gained administrative independence from Bedwellty between the 1870s and 1890s. A Bedwellty Local Government District was established for the rest of the parish in 1891, becoming an urban district in 1894.

Bedwellty Urban District was abolished in 1974, being divided between the Rhymney Valley and Islwyn districts. A community called Bedwellty was then created for the part of the former urban district which lay within Islwyn. The community of Bedwellty was abolished in 1982, being divided into the four communities of Argoed, Blackwood, Cefn Fforest, and Pengam.

The original ancient parish was very large, including most of the upper Ebbw and Sirhowy valleys. The first census, of 1801 documented that 619 people lived in the parish, which then included Rhymney and Tredegar. A number of coal mining communities grew up in the parish, and in the 19th century these became separate local government units.

The church of St Sannan was built in a thirteenth century Gothic style. The church tower is fourteenth century and contains six bells. The church was restored in 1858 and repaired in 1882. The exterior is whitewashed.

The Bedwellty Poor Law Union was established in 1849, covering the two parishes of Bedwellty and Aberystruth. A workhouse was built to serve the area at Georgetown in Tredegar, opening in 1852.

On 19 June 1874, Ebbw Vale, Rhymney and Tredegar local boards of health and local government districts were formed, each including parts of the civil parish. The remainder of the parish of Bedwellty became a local government district on 29 May 1891. When parish and district councils were established under the Local Government Act 1894, the Bedwellty Local Government District became Bedwellty Urban District. The 1894 act also directed that parishes could not straddle district boundaries, and so the parts of Bedwellty parish which were within the Ebbw Vale, Rhymney and Tredegar urban districts became separate civil parishes.

Bedwellty urban district included the hamlets and villages of Aberbargoed, Argoed, Blackwood, New Tredegar, and Pengam.

In 1926, Bedwellty and Mynyddislwyn urban districts formed the West Monmouthshire Omnibus Board to ensure local control of bus services. In 1935, a County Review Order altered the boundaries between Bedwellty and Mynyddislwyn.