- Emma Dutton: Emma, played by Marley Shelton, is John Dutton Sr.'s wife and the mother of their son Jack. After John's death, Emma dies by suicide, leaving their son to carry on the family legacy.

- Jack Dutton: Darren Mann plays Jack Dutton, John Dutton Sr.'s son, in 1923. Alongside his father and great-uncle Jacob, Jack works on the Yellowstone Dutton Ranch. He marries his wife Elizabeth Strafford during the first season.

- Elizabeth Dutton: Elizabeth, portrayed by Michelle Randolph, is Jack Dutton's wife in 1923. She struggles with the reality of being married to a rancher but becomes closer to Jack following a miscarriage.

- Spencer Dutton: Spencer, played by Brandon Sklenar, is James and Margaret's second son. He serves in World War I and becomes a big game hunter in Africa. However, he eventually returns to Montana after his brother John Sr. is killed, potentially becoming the father of John Dutton II and grandfather of Yellowstone's John Dutton III.

- Alexandra Dutton: Julia Schlaepfer portrays Alexandra, who falls in love with Spencer Dutton while visiting Kenya with her then-fiancé. After leaving her fiancé, Alexandra and Spencer quickly get married. Despite being separated from Spencer, she eventually arrives at the Yellowstone Dutton Ranch.

- Claire Dutton: Dawn Olivieri plays Claire, Jacob and James' sister and Henry's widow, in 1883. Claire travels alongside the Dutton family but tragically dies by suicide after her daughter Mary Abel is killed.

- Mary Abel: Mary Abel, portrayed by Emma Malouff, is the only surviving child of Claire and Henry Dutton in 1883. She embarks on the journey to the West with her family but is killed by a gang near Fort Worth, Texas.

- Jacob Dutton: Harrison Ford takes on the role of Jacob in 1923. As the patriarch of the family, Jacob outlives his brother James and sister Claire. Alongside his wife Cara, Jacob takes care of the family ranch and serves as the commissioner of the livestock association.

- Cara Dutton: Helen Mirren portrays Cara, Jacob's wife, in 1923. Cara is originally from Ireland and assists Jacob in running the ranch. She helps keep the home in order and forms a close bond with Emma and Elizabeth.

- John Dutton II: John Dutton II is briefly mentioned in 1923 and appears in a flashback episode of Yellowstone. Dabney Coleman portrays John II, who is the father of John III and grandfather to Lee, Jamie, Beth, and Kayce.

His parents' identities have not been fully confirmed, but he is potentially the son of either Spencer and Alexandra or Jack and Elizabeth.

- John Dutton III: Kevin Costner plays John Dutton III in Yellowstone. John III inherits the Yellowstone Dutton Ranch and has complicated relationships with his four children: Lee, Jamie, Beth, and Kayce. He also forms a close bond with his grandson, Tate. Professionally, John III is a powerful figure who prioritizes the preservation of his ranch and land. He becomes the governor of Montana in season 5. These are just some of the many characters that make up the sprawling Dutton family. Their stories, spanning generations, have captivated audiences and made the Yellowstone franchise a hit.