Watford have played Aberdare Athletic 12 times in competitive football, winning 4, drawing 2 and losing 6, first meeting on 24 Sep 1921 and most recently on 19 Feb 1927. Every meeting is listed below.
| Date | Season | Competition | Venue | Opponent | Score | Scorers | Att |
|---|---|---|---|---|---|---|---|
| 24 Sep 1921 | 1921–22 | Third Division South | A | Aberdare Athletic | 0–3 | ||
| 1 Oct 1921 | 1921–22 | Third Division South | H | Aberdare Athletic | 3–0 | ||
| 3 Mar 1923 | 1922–23 | Third Division South | A | Aberdare Athletic | 1–3 | ||
| 10 Mar 1923 | 1922–23 | Third Division South | H | Aberdare Athletic | 6–0 | ||
| 9 Feb 1924 | 1923–24 | Third Division South | A | Aberdare Athletic | 0–4 | ||
| 18 Apr 1924 | 1923–24 | Third Division South | H | Aberdare Athletic | 2–0 | ||
| 29 Nov 1924 | 1924–25 | Third Division South | A | Aberdare Athletic | 0–2 | ||
| 4 Apr 1925 | 1924–25 | Third Division South | H | Aberdare Athletic | 0–0 | ||
| 29 Aug 1925 | 1925–26 | Third Division South | H | Aberdare Athletic | 2–0 | ||
| 2 Jan 1926 | 1925–26 | Third Division South | A | Aberdare Athletic | 1–8 | ||
| 2 Oct 1926 | 1926–27 | Third Division South | A | Aberdare Athletic | 2–3 | ||
| 19 Feb 1927 | 1926–27 | Third Division South | H | Aberdare Athletic | 2–2 |