Cheltenham & Gloucester plc (C&G) was a mortgage and savings provider in the United Kingdom. C&G specialised in mortgages and savings products. Previously, C&G was a building society, the Cheltenham and Gloucester Building Society. Its headquarters were in Barnwood, Gloucester, Gloucestershire, England. It was acquired by Lloyds Bank in 2009.

C&G can trace its roots back to the Cheltenham and Gloucestershire Permanent Mutual Benefit Building and Investment Association. Its inaugural meeting, held at the Belle Vue Hotel, Cheltenham took place on 7 August 1850, and the society shortened its name to Cheltenham and Gloucestershire Benefit Building Society. The first President of the society was James Downing, of Cheltenham. Downing believed in a philosophy whereupon it was a citizen's duty to help other citizens and this was a driving force for him in helping the poor to achieve stability through home ownership. Even so, the Society was run rather shrewdly, and upon Downing's death in 1868, it had an annual income of £37,000.

At first the Society was based in Cheltenham; its first Gloucester branch opened in 1896. Over the next 80 years, it expanded throughout the UK, opening its 100th branch in Pershore in 1979. During the 1980s, C&G acquired several smaller building societies, as consolidation of the sector intensified. C&G's headquarters were at Cheltenham House in central Cheltenham until their move to Barnwood in 1989. The then building society had commissioned a sculpture by British artist Barbara Hepworth, "Theme and Variations", which can still be seen displayed on the front of Cheltenham House.

In 1984 Cotswold Building Society transferred its undertakings to C&G. This was followed by the Waltham Abbey in 1985, the Colchester, the London Permanent and the Cardiff in 1987, the Essex Equitable and the Bolton in 1988, the Bury St Edmunds in 1989, the Bedford, the Guardian, the Peckham and the Walthamstow in 1990, the Portsmouth and the Bedford Crown in 1991, and the Mid-Sussex in 1992 (despite a controversy surrounding the bank which prompted an investigation by ITV's The Cook Report that year).

In 1993 C&G merged with the Heart of England Building Society. By the mid 1990s it had taken over the Portsmouth, Guardian, Peckham, Walthamstow, Cardiff, Colchester, London Permanent, Bolton, Bury St Edmunds and Essex Equitable building societies.

C&G converted to a bank in 1995. This involved the demutualisation of the society, and generated a windfall payment to its members. It was then acquired by Lloyds Bank later in 1995.

In 2007 C&G was restructured and closed 31 of its 195 branches, resulting in the loss of 315 jobs.

On 9 June 2009, it was reported that Lloyds Banking Group would close Cheltenham & Gloucester's 164 branches in November of that year, at the cost of around 1,660 jobs. Lloyds stated that the C&G brand name would be retained for mortgages and savings, while customers could use any branch of Lloyds TSB to access their accounts. However, on 19 August 2009, Lloyds announced that it would review this decision.