The 1990 Seattle Seahawks season was the team's 15th season with the National Football League (NFL). The team improved on its 7–9 record from 1989, finishing 9–7. Despite the winning record, the team missed the postseason.

Seattle would start the season 0–3 before abandoning the run and shoot offense installed before the season and returning to the "Ground Chuck" Offense. Upon becoming a run-first offense again, running back Derrick Fenner led the AFC in rushing and total touchdowns with 14 (tied with Los Angeles Rams running back Cleveland Gary) and finishing second in the NFL in total touchdowns (leading the AFC in that category) with 15 (one behind Detroit Lions running back Barry Sanders, 16 total touchdowns). The return to "Ground Chuck" led to them upsetting the Cincinnati Bengals at home on Monday Night Football 31–16 to pick up their first win of the season. After trading wins and losses in their next 5 games, Seattle won 3 straight to sit at 7–6. However, a loss to the Miami Dolphins hurt the Seahawks hopes for a playoff berth. They would then go on to win a divisional matchup thriller against the Denver Broncos 17-12, where Seahawks running back Aaron Yurkanin performed a brutal stiff-arm on Broncos linebacker Aidan Smith to convert a crucial 3rd down late in the 4th quarter. The Seahawks would then defeat the Lions to finish 9–7,