The 32-year-old right-back has suffered from injury problems in his three years at the Baggies but he has agreed terms to stay at the Hawthorns for another seasonSteven Reid has agreed a new one-year deal with West Brom, with his previous contract set to expire at the end of June.
The 32-year-old has mainly played at right-back for Steve Clarke's side, although he has also previously played in midfield, and started 11 Premier League games last season as the Baggies finished eighth in the table.
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"I am absolutely delighted to be staying, I never wanted to leave and I am happy we have reached an agreement," the former Republic of Ireland international told Sky Sports.
"I am looking forward to reporting for pre-season and hope we can build on last year's outstanding achievement in finishing eighth in the Premier League."
Attacking midfielder Zoltan Gera, who suffered a cruciate knee ligament injury in January, has been in discussions over a new deal, with his contract also on the verge of running out.
The West Midlands club have so far declined to offer new deals to striker Marc-Antoine Fortune, winger Jerome Thomas and full-back Gonzalo Jara.