Quarterback Starr was named the league's most valuable player (MVP) in 1966. Said Cold Hard Football Facts about Starr's 1966 season, "Starr, always underappreciated, was at his classic assassin-like best in 1966, his lone MVP season. He led the league in completion percentage, yards per attempt and passer rating, while his 4.7-to-1 [touchdown-to-interception] ratio remains one of the very best in history. Starr, as always, cranked out great performances when he absolutely had to: the 1966 Packers, for example, were the worst rushing team in football, with a meager average of 3.5 [yards-per-attempt] on the ground, despite the reputation Lombardi's Packers still carry with them today as a dominant running team."Cold Hard Football Facts also notes that 1966 Packers had the best passer rating differential (offensive passer rating minus opponents passer rating), +56.0, in the Super Bowl Era. 
The Washington Redskins made overtures to Vince Lombardi about becoming their new head coach. Lombardi refused their offer and the Redskins had to settle for Otto Graham as their new head coach. Lombardi replaced Graham in Washington in 1969.
In the 1966 NFL draft, held in late November 1965, the Packers selected running back Jim Grabowski of Illinois with the ninth overall pick. Common for pro football in the mid-1960s, the Packers found themselves in a bidding war for Grabowski. The expansion Miami Dolphins of the American Football League selected Grabowski with the first overall selection of the AFL Draft, held the same day. Lombardi's plan was to groom Grabowski to take over for Jim Taylor at fullback. Despite being offered more money by the Dolphins, Grabowski said it was an honor to be drafted by the Packers. Grabowski signed with the Packers and landed on the cover of Sports Illustrated in August, with veteran backfield tandem Paul Hornung and Taylor on the main cover and rookies Grabowski and Donny Anderson on the foldout. The signing of Grabowski upset Taylor, who felt that he was underpaid and made it publicly known that he would leave Green Bay once his contract expired. Taylor had been given an offer by the expansion Atlanta Falcons, but agreed to honor his contract before moving to another team and played out his option in 1966.
Fellow rookie running back Anderson of Texas Tech was the seventh overall selection of the 1965 draft as an underclassman, and he stayed in school for his senior season in 1965. Due to their large contracts, signed during the height of the pre-merger bidding war with the AFL, as well as their high visibility as the apparent replacements for Hornung and Taylor, Anderson and Grabowski were nicknamed the "Gold Dust Twins."
The 1966 draft (November 1965) was the last one held separately for the two leagues. Following the merger agreement of June 1966, a common draft was conducted in March 1967.
The defending champion Packers finished the regular season with a league best record of 12–2, returning them to the NFL championship game as Western Conference champions. Until 1975, NFL playoff sites were rotated, so the Eastern Conference champion Dallas Cowboys (10–3–1) hosted the title game in 1966 at the Cotton Bowl on January 1, 1967.
GB – Elijah Pitts 11 att, 43 yards, TD
Jim Taylor 17 att, 43 yards
BAL – Jerry Hill 25 att, 88 yards
GB – Elijah Pitts 4 rec, 79 yards, TD
BAL – Raymond Berry 4 rec, 59 yards
Zeke Bratkowski relieved Bart Starr, who suffered a muscle spasm in the first half. Bratkowski directed an 80-yard drive in the fourth quarter that resulted in a go-ahead touchdown run by Elijah Pitts. John Unitas then led the Colts to the Green Bay 15, but there lost a fumble which came to be known as the 'Million Dollar Fumble', to secure the Packers' win that clinched the Western Conference crown.
GB – Max McGee 28-yard pass from Bart Starr (kick blocked)
DAL – Frank Clarke 68-yard pass from Don Meredith (Danny Villanueva kick)
GB – Bart Starr 19/28, 304 yards, 4 TD
DAL – Don Meredith 15/31, 238 yards, TD, INT
GB – Elijah Pitts 12 att, 66 yards
DAL – Don Perkins 17 att, 108 yards, TD
GB – Carroll Dale 5 rec, 128 yards, TD
DAL – Frank Clarke 3 rec, 102 yards, TD
Green Bay took an early 14–0 lead on two first-quarter scores; a 17-yard touchdown pass from Bart Starr to Elijah Pitts and an 18-yard fumble return by Jim Grabowski on the ensuing kickoff. The Cowboys tied the score with two touchdowns towards the end of the quarter.
Starr's third touchdown pass of the game gave the Packers a 34–20 lead with 5:20 left in the game, but the Cowboys responded with a 68-yard touchdown pass from Don Meredith to Frank Clarke. Dallas advanced to the Green Bay 22-yard line on their next drive, when a pass interference penalty gave the Cowboys a first down at the Packer 2-yard line. But Green Bay's Tom Brown intercepted a Meredith pass in the end zone with 28 seconds left to play to preserve the victory for the Packers.
With the win, the Packers earned their 10th NFL championship. It was their second in a row and fourth in six seasons.
The Packers jumped out to an early 7–0 lead with Bart Starr's 37-yard touchdown pass to reserve receiver Max McGee, who had been put into the game just a few plays earlier to fill in for injured starter Boyd Dowler. Early in the second quarter, Kansas City marched 66 yards in 6 plays to tie the game on a 7-yard pass from quarterback Len Dawson to Curtis McClinton. But the Packers responded on their next drive, advancing 73 yards down the field and scoring on fullback Jim Taylor's 14-yard touchdown run with the team's famed "Power Sweep" play. The Chiefs then cut the lead with a minute left in the half, 14–10, on Mike Mercer's 31-yard field goal.
Early in the second half Dawson was intercepted by defensive back Willie Wood. He returned the interception 50 yards to the Kansas City 5-yard line. On the next play Elijah Pitts rushed 5-yards for a touchdown, giving the Packers a 21–10 lead. Max McGee scored his second touchdown of the game with a 13-yard reception from Bart Starr. The Packers held the Chiefs' offense to 12 yards in the third quarter. Elijah Pitts scored another touchdown for the Packers in the third quarter on a one-yard touchdown run. The Packers would win the game 35–10. Quarterback Bart Starr was named the MVP of the game, completing 16 of 23 passes for 250 yards and two touchdowns.