Rajiv van La Parra fired a stunning first-half winner as 10-man Huddersfield held on for another Premier League win to heap more pressure on West Brom boss Tony Pulis.
Van La Parra curled home the only goal just before half-time and although Christopher Schindler was sent off early in the second period, David Wagner's side produced more heroics to leave the visitors without a win in nine Premier League matches.
The Terriers, indebted to goalkeeper Jonas Lossl in stoppage time, beat Manchester United in their previous home game and this fourth league win of the season has lifted them five points clear of the Baggies, who have not won since mid-August.
Huddersfield Town 1-0 West Bromwich Albion
