Ifor Williams Trailers is the United Kingdom's largest manufacturer of trailers under 3,500 kilograms (7,700 lb), based in Corwen, Denbighshire, North Wales.

Started in 1958 by local farmer Ifor Williams, an on-site galvanizing plant gives the company total control over quality and efficiency in the production of chassis and other assemblies. The company employs approximately 800 people across six sites in Clawdd Poncen, Cynwyd, Ruthin, Deeside and Sandycroft, Flintshire. During the Great Recession, 63 employees were made redundant in late 2008.

Production was affected by fire on two occasions. The first, on 28 August 2012, caused severe damage to the company's Deeside plant. The second, on 14 September 2017, was limited to machinery at the Clawdd Poncen site.

Their main showroom is located in the former Corwen railway station. Product distribution is handled by over fifty main dealers in the UK, with 25% of total sales going for export via independent distributors across Europe.

In June 2016, Ifor Williams became the main kit sponsor of Wrexham Football Club. The kit launch was held at the Urdd National Eisteddfod in Flint.

In 2020 actors Ryan Reynolds and Rob McElhenney created an advert for the company as part of their purchase application for Wrexham Football Club.

On 30 June 2021, Wrexham's announced that Chinese social media company TikTok will be the club's new shirt sponsor for the 2021–22 campaign. Ifor Williams will now become the shorts sponsor.

• Company website

52°59′34″N 3°22′51″W / 52.99283°N 3.38094°W / 52.99283; -3.38094