The fourth season of Packed to the Rafters, an Australian drama television series, began on 8 February 2011 on the Seven Network. The season concluded on 20 March 2012 after 22 episodes.

Season four traces the family's fortunes as they attempt to rebuild their lives in the aftermath of Melissa's death. Strong family bonds ensure that traumatised Ben receives warm support as he takes his first steps back into the work-force. Slowly he learns to smile again, embracing a newfound interest in gardening and a growing friendship with his boss's daughter Emma, which might hold the promise of something more. There are further love issues in the Karandonis household, with Carbo and Retta choosing to elope rather than face the comic extravagance of a Karandonis wedding. Julie and Dave, meanwhile, are forced to deal with the consequences for Rachel and Jake of a dangerous accusation flung at him by a drunken woman on a rugby weekend away. Rachel's feelings for Jake are tested to the limit, especially when her boss throws into the confusing mix the chance of a lifetime to work in New York. The Rafters also wrestle with the unexpected arrival of new family members, not the least being the release from prison of Dave's father, Tom. Tom's never quite predictable manipulations ultimately force Dave to take a heart-breaking stand, and cause him to initially misjudge the intentions of his half-brother, Matt. Julie meanwhile finds a new best friend in Donna, though their initial exchanges are hilariously unpromising. Meanwhile Nathan is searching for new direction in his life and his desire to travel forces Julie and Dave to undertake some soul-searching of their own. Ted is also keen to find a greater purpose, mentoring a troubled twelve-year-old boy.