| 1928–29 Lancashire Cup | |
| Structure: | Regional knockout competition |
| Season Champs: | Wigan |
| Season Champ Name: | Winners |
| Second Place: | Widnes |
| Prevseason Link: | 1927 Lancashire Cup |
| Prevseason Year: | 1927–28 |
| Nextseason Link: | 1929 Lancashire Cup |
| Nextseason Year: | 1929–30 |
| No Of Teams: | 13 |
The 1928–29 Lancashire Cup was the 21st running of this regional rugby league competition. Wigan took the trophy for the 6th time, by beating Widnes by 5–4 in the final played at Wilderspool, Warrington. The attendance was 19,000 and receipts £1,150.
The number of teams entering this year's competition remained at 13 which resulted in 3 byes in the first round.
Involved 5 matches (with three byes) and 13 clubs
| width=20 abbr="No" | Game No | width=100 abbr="Date" | Fixture date | width=150 abbr="Home team" | Home team | width=5 abbr="space" | width=20 abbr="Score" | Score | width=5 abbr="space" | width=150 abbr="Away team" | Away team | width=150 abbr="Venue" | Venue | width=30 abbr="Att" | Att | width=30 abbr="Rec" | Rec | width=20 abbr="Notes" | Notes | width=30 abbr="Ref" | Ref | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Sat 13 October 1928 | Broughton Rangers | 10–15 | St. Helens | The Cliff | [2] | |||||||||||||||||
| 2 | Sat 13 October 1928 | St Helens Recs | 7–7 | Warrington | Knowsley Road | 1 | [3] | ||||||||||||||||
| 3 | Sat 13 October 1928 | Swinton | 7–3 | Leigh | Chorley Road ground | ||||||||||||||||||
| 4 | Sat 13 October 1928 | Widnes | 4–0 | Wigan Highfield | Lowerhouse Lane | [4] | |||||||||||||||||
| 5 | Sat 13 October 1928 | Wigan | 37–13 | Barrow | Central Park | [5] | |||||||||||||||||
| 6 | Rochdale Hornets | bye | |||||||||||||||||||||
| 7 | Oldham | bye | |||||||||||||||||||||
| 8 | Salford | bye | |||||||||||||||||||||
| Replay | |||||||||||||||||||||||
| 9 | Wed 17 October 1928 | Warrington | 10–2 | St Helens Recs | Wilderspool | 2 | |||||||||||||||||
| width=20 abbr="No" | Game No | width=100 abbr="Date" | Fixture date | width=150 abbr="Home team" | Home team | width=5 abbr="space" | width=20 abbr="Score" | Score | width=5 abbr="space" | width=150 abbr="Away team" | Away team | width=150 abbr="Venue" | Venue | width=30 abbr="Att" | Att | width=30 abbr="Rec" | Rec | width=20 abbr="Notes" | Notes | width=30 abbr="Ref" | Ref | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Mon 22 October 1928 | Rochdale Hornets | 2–15 | Widnes | Athletic Grounds | ||||||||||||||||||
| 2 | Wed 24 October 1928 | Oldham | 12–2 | Salford | Watersheddings | ||||||||||||||||||
| 3 | Wed 24 October 1928 | Swinton | 3–21 | Wigan | Chorley Road ground | ||||||||||||||||||
| 4 | Wed 24 October 1928 | Warrington | 14–11 | St. Helens | Wilderspool |
| width=20 abbr="No" | Game No | width=100 abbr="Date" | Fixture date | width=150 abbr="Home team" | Home team | width=5 abbr="space" | width=20 abbr="Score" | Score | width=5 abbr="space" | width=150 abbr="Away team" | Away team | width=150 abbr="Venue" | Venue | width=30 abbr="Att" | Att | width=30 abbr="Rec" | Rec | width=20 abbr="Notes" | Notes | width=30 abbr="Ref" | Ref | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Mon 5 November 1928 | Oldham | 5–5 | Wigan | Watersheddings | ||||||||||||||||||
| 2 | Thu 8 November 1928 | Widnes | 25–5 | Warrington | Lowerhouse Lane | ||||||||||||||||||
| Replay | |||||||||||||||||||||||
| 1 | Wed 7 November 1928 | Wigan | 21–0 | Oldham | Central Park | ||||||||||||||||||
| width=20 abbr="No" | Game No | width=100 abbr="Date" | Fixture date | width=150 abbr="Home team" | Home team | width=5 abbr="space" | width=20 abbr="Score" | Score | width=5 abbr="space" | width=150 abbr="Away team" | Away team | width=150 abbr="Venue" | Venue | width=45 abbr="Att" | Att | width=60 abbr="Rec" | Rec | width=20 abbr="Notes" | Notes | width=30 abbr="Ref" | Ref | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Saturday 24 November 1928 | Wigan | 5–4 | Widnes | Wilderspool | 19000 | £1,150 | 3 | [6] |