The Crime Writers' Association (CWA) is a specialist authors’ organisation in the United Kingdom, most notable for its Dagger awards for the best crime writing of the year, and the Diamond Dagger awarded to an author for lifetime achievement. The Association also promotes crime writing of fiction and non-fiction by holding annual competitions, publicising literary festivals and establishing links with libraries, booksellers and other writer organisations, both in the UK such as the Society of Authors, and overseas. The CWA enables members to network at its annual conference and through its regional chapters as well as through dedicated social media channels and private website. Members' events and general news items are published on the CWA website which also features Find An Author where CWA members are listed and information provided about themselves, their books and their awards.

The CWA publishes a monthly magazine exclusively for members called Red Herrings, edited by Matthew Booth since 2020.

The CWA runs a sister organisation aimed at readers of crime fiction and non-fiction called the Crime Reader's Association. Anyone can join free of charge and receive two digital magazines: the bimonthly Case Files and the monthly CRA Newsletter. On the site are blogs, short stories and author profiles.