A member of the board of the Letterkenny Agricultural Hall, Jim is an agricultural auctioneer, and perhaps on account of this was invited to emcee events like the Letterkenny Talent Show ("Letterkenny Talent Show"). He has a tendency to lapse into his auction chant, however, even in everyday conversation ("A Fuss at the Ag Hall").
Jim is upright and neighborly in his interactions with the townsfolk. Fed up with the slow pace of McMurray's Ag Hall board meetings, Jim encouraged Wayne to run for president, and led a vote to remove McMurray ("A Fuss at the Ag Hall"). When a more formal election was called, though, Wayne lost even Jim's vote; Jim found Wayne's campaign video, produced by Stewart, to be offensive. Nevertheless, he dropped by Wayne's farm afterwards to help with chorin', in thanks for Wayne mowing his lawn as a favor during the week, and the two end cordially ("The Election").
McMurray and Mrs. McMurray frequently tease him by mispronouncing his name as "Dickskin"; after Jim corrects them that it is "Dickens," they pretend "that's exactly what I said." Wayne pronounces his name correctly, except once, apologetically, only to get him to stop auctioneering while McMurray pitched his business proposal to Wayne and Katy ("Uncle Eddie's Trust").
He is seen from time to time at MoDean's, even scrapping with the Hicks against degens ("Never Work a Day in Your Life"). His other friends, romantic interests, or family are unknown. When he arrives at the produce stand after the election to offer some help to Wayne, he rides with an older couple who may be parents or other family members ("The Election").
Jim is usually seen bearded, wearing a light cowboy hat, blue jeans, brown belt with a large steel buckle, and cowboy boots. He may wear a Western shirt, or other shirts with a dark leather vest and bolo tie.
- Jim Dickens and Bonnie McMurray are the only recurring characters whose first and last names are both known.
- An ad for Jim Dickens' Auction House can be seen at the Donegal hockey arena when the Letterkenny Shamrockettes play there for the championship ("Back to Back to Back").