James Richard Atkin, Baron Atkin (28 November 1867 – 25 June 1944) was a lawyer and judge of Australian-Welsh origin, who practised in England and Wales. He always thought of himself as a Welshman, and was President of the London Welsh Trust from 1938 to 1944.

His parents were Robert Travers Atkin (1841–1872) and his wife, Mary Elizabeth née Ruck (born 1842). Robert was from Kilgariff, County Cork, Mary's father from Newington, Shepway and her mother from Merioneth, Wales. The couple married in 1864 and soon emigrated to Australia intending to take up sheep farming. However, little more than a year into their enterprise Robert was badly injured in a fall from a horse and the couple moved to Brisbane where Robert became a journalist and politician. James was born in Brisbane, the eldest of three sons but in 1871, his mother brought him and his siblings back to her own mother's house, "Pantlludw" on the River Dovey in Wales. His father died in Australia in the following year. James was much influenced by his grandmother and acquired from her an egalitarian instinct and a distaste for sanctimonious posturing.

Tim Atkin is a British Master of Wine, and wine correspondent of several publications.

Atkin has published columns in The Observer, Observer Food Monthly, Off Licence News, Woman and Home, The World of Fine Wine, The Economist. Between 2000 and 2003 Atkin was editor of Harpers Wine and Spirit Magazine. On television, he has appeared as a presenter on BBC One's Saturday Kitchen and the wine series, Grape Expectations on the Carlton Food Network.

In addition to his work as a wine critic and correspondent, Atkin held the "Ask Tim" column in The Observer, conducts interviews (such as the account of the wine interests of David Ginola), frequently acts as a wine tasting judge and is a chairperson of the International Wine Challenge.

During the course of five years Atkin co-authored the annual consumer guide Grapevine with Anthony Rose, and has written the books Chardonnay and Vins de Pays d'Oc. In September 2008 Atkin was also one of five UK wine writers, along with Anthony Rose, Tom Cannavan, Joanna Simon and Olly Smith, to launch an online wine ratings magazine for the UK called The Wine Gang. In November 2010, Atkin's departure from the site was announced.