The Seahawks topped the Broncos 26-20 Sunday in a rematch of last season's Super Bowl.
"From his hands to his feet, Russell Wilson is doing it all for the defending champs," Ira Kaufman of the Tampa Tribune said.
The Green Bay Packers plunged from 10th to 17th after losing to Detroit.
Seattle had nine first-place votes from the 12-member media panel that regularly covers the league.
"Got the Broncos' best and still escaped in overtime," John Czarnecki of Fox Sports said.
The unbeaten Cincinnati Bengals received the other three first-place votes.
Both the Seahawks and Bengals will have their byes this weekend and will return in prime-time games.
Seattle's next game is on Monday night Oct. 6 in Washington, and Cincinnati will travel to Foxborough, Massachusetts, to face Tom Brady and the New England Patriots on Oct. 5.
"Andy Dalton has thrown 84 passes this season for the Bengals without a sack," Rick Gosselin of The Dallas Morning News said. "Keep your quarterback standing in this league and you can win a lot of games."
The Broncos slipped to No. 3 after their loss, followed by the Philadelphia Eagles and Arizona Cardinals at No. 4 and No. 5, respectively.
The Bengals, Eagles and Cardinals are the league's remaining unbeaten teams.
Herm Edwards of ESPN has been impressed with the Cardinals' start considering backup quarterback Drew Stanton has had to play two games in place of the injured Carson Palmer.
"2-0 now with backup Drew Stanton," Edwards said. "This defense is for real."
San Diego, New England, Chicago, Baltimore and Detroit rounded out the top 10.
Foxsports.com's Alex Marvez said the Lions passed an early-season test with a 19-7 victory over the rival Packers that moved them into a first-place tie in the NFC North.
"Finally besting Green Bay quarterback Aaron Rodgers made a strong statement," Marvez said.
Here are the complete rankings from this week’s poll.