| Club: | Manchester United |
| Season: | 1909–10 |
| Manager: | Ernest Mangnall |
| Chairman: | John Henry Davies |
| League: | First Division |
| League Result: | 5th |
| Cup1: | FA Cup |
| Cup1 Result: | First Round |
| League Topscorer: | George Wall (14) |
| Season Topscorer: | George Wall (14) |
| Highest Attendance: | 50,000 vs Bristol City (25 March 1910) |
| Lowest Attendance: | 5,500 vs Everton (6 April 1910) |
| Average Attendance: | 19,447 |
| Pattern B1: | _buttons |
| Pattern So1: | _2 white stripes |
| Leftarm1: | E20E0E |
| Body1: | E20E0E |
| Rightarm1: | E20E0E |
| Shorts1: | FFFFFF |
| Socks1: | 000000 |
| Pattern La2: | _borderred |
| Pattern B2: | _red_neck |
| Pattern Ra2: | _borderred |
| Leftarm2: | FFFFFF |
| Body2: | FFFFFF |
| Rightarm2: | FFFFFF |
| Shorts2: | FFFFFF |
| Socks2: | 000000 |
| Pattern La3: | _black_stripes1 |
| Pattern B3: | _blackstripes_thin4 |
| Pattern Ra3: | _black_stripes1 |
| Leftarm3: | 3366CC |
| Body3: | 3366CC |
| Rightarm3: | 3366CC |
| Shorts3: | FFFFFF |
| Socks3: | 000000 |
| Prevseason: | 1908–09 |
| Nextseason: | 1910–11 |
The 1909–10 season was Manchester United's 18th consecutive season in the Football League and fourth in a row in the First Division.[1]
The club's participation in the Football League seemed uncertain at the start of the season, the Football Association withdrew its recognition of the Association of Football Players’ and Trainers’ Union when the union's intentions were made clear to the FA. Footballers throughout the country relinquished their membership of the AFPTU but the Manchester United team stood up to the FA and refused to give up membership. The club's players, who were dubbed by the press as the "Outcasts FC", continued to strike against the FA until their demands were met, but the FA responded by banning those affiliated with the AFPTU. A compromise was reached between the two parties and the suspension was lifted in time for the first game of the season.
In February 1910, the club moved from their old ground at Bank Street to a new home at Old Trafford. The first game played at the new stadium was a First Division fixture against Liverpool on 19 February 1910; the visitors won the match 4–3.
| Date | Opponents | H / A | Result F–A | Scorers | Attendance | |
|---|---|---|---|---|---|---|
| 1 September 1909 | Bradford City | H | 1–0 | Wall | 12,000 | |
| 4 September 1909 | Bury | H | 2–0 | J. Turnbull (2) | 12,000 | |
| 6 September 1909 | Notts County | H | 2–1 | J. Turnbull, Wall | 6,000 | |
| 11 September 1909 | Tottenham Hotspur | A | 2–2 | J. Turnbull, Wall | 40,000 | |
| 18 September 1909 | Preston North End | H | 1–1 | Roberts | 13,000 | |
| 25 September 1909 | Notts County | A | 2–3 | S. Turnbull (2) | 11,000 | |
| 2 October 1909 | Newcastle United | H | 1–1 | Wall | 30,000 | |
| 9 October 1909 | Liverpool | A | 2–3 | S. Turnbull (2) | 40,000 | |
| 16 October 1909 | Aston Villa | H | 2–0 | Halse, S. Turnbull | 20,000 | |
| 23 October 1909 | Sheffield United | A | 1–0 | S. Turnbull | 30,000 | |
| 30 October 1909 | Arsenal | H | 1–0 | Wall | 20,000 | |
| 6 November 1909 | Bolton Wanderers | A | 3–2 | Homer (2), Halse | 20,000 | |
| 13 November 1909 | Chelsea | H | 2–0 | S. Turnbull, Wall | 10,000 | |
| 20 November 1909 | Blackburn Rovers | A | 2–3 | Homer (2) | 40,000 | |
| 27 November 1909 | Nottingham Forest | H | 2–6 | Halse, Wall | 12,000 | |
| 4 December 1909 | Sunderland | A | 0–3 | 12,000 | ||
| 18 December 1909 | Middlesbrough | A | 2–1 | Homer, S. Turnbull | 10,000 | |
| 25 December 1909 | Sheffield Wednesday | H | 0–3 | 25,000 | ||
| 27 December 1909 | Sheffield Wednesday | A | 1–4 | Wall | 37,000 | |
| 1 January 1910 | Bradford City | A | 2–0 | S. Turnbull, Wall | 25,000 | |
| 8 January 1910 | Bury | A | 1–1 | Homer | 10,000 | |
| 22 January 1910 | Tottenham Hotspur | H | 5–0 | Roberts (2), Connor, Hooper, Meredith | 7,000 | |
| 5 February 1910 | Preston North End | A | 0–1 | 4,000 | ||
| 12 February 1910 | Newcastle United | A | 4–3 | S. Turnbull (2), Blott, Roberts | 20,000 | |
| 19 February 1910 | Liverpool | H | 3–4 | Homer, S. Turnbull, Wall | 45,000 | |
| 26 February 1910 | Aston Villa | A | 1–7 | Meredith | 20,000 | |
| 5 March 1910 | Sheffield United | H | 1–0 | Picken | 40,000 | |
| 12 March 1910 | Arsenal | A | 0–0 | 4,000 | ||
| 19 March 1910 | Bolton Wanderers | H | 5–0 | Halse, Meredith, Picken, J. Turnbull, Wall | 20,000 | |
| 25 March 1910 | Bristol City | H | 2–1 | Picken, J. Turnbull | 50,000 | |
| 26 March 1910 | Chelsea | A | 1–1 | J. Turnbull | 25,000 | |
| 28 March 1910 | Bristol City | A | 1–2 | Meredith | 18,000 | |
| 2 April 1910 | Blackburn Rovers | H | 2–0 | Halse (2) | 20,000 | |
| 6 April 1910 | Everton | H | 3–2 | J. Turnbull (2), Meredith | 5,500 | |
| 9 April 1910 | Nottingham Forest | A | 0–2 | 7,000 | ||
| 16 April 1910 | Sunderland | H | 2–0 | S. Turnbull, Wall | 12,000 | |
| 23 April 1910 | Everton | A | 3–3 | Homer, S. Turnbull, Wall | 10,000 | |
| 30 April 1910 | Middlesbrough | H | 4–1 | Picken (4) | 10,000 |