1911–12 Northern Rugby Football Union season

Huddersfield finished the regular season as league leaders and then went on to claim their first Championship by defeating Wigan 13-5 in the play-off final.

The Challenge Cup Winners were Dewsbury who defeated Oldham 8-5.

[1] Huddersfield's Australian winger Albert Rosenfeld set a new record for tries in a season with 76.

Rochdale Hornets beat Oldham 12–5 to win the Lancashire Cup, and Huddersfield beat Hull Kingston Rovers 22–10 to win the Yorkshire County Cup.

Dewsbury defeated Oldham 8-5 at Leeds in front of a crowd of 15,271 to win their first Challenge Cup in their first Final appearance.