| Billy Williams | |
| Fullname: | William Dennis Williams |
| Birth Date: | 1905 9, df=y |
| Birth Place: | Leytonstone, England |
| Position: | Forward |
| Youthclubs1: | Fairburn House |
| Years1: | 1921–1927 |
| Clubs1: | West Ham United |
| Caps1: | 33 |
| Goals1: | 7 |
| Years2: | 1927–1928 |
| Clubs2: | Chelsea |
| Caps2: | 2 |
| Goals2: | 0 |
| Totalcaps: | 35 |
| Totalgoals: | 7 |
William Dennis Williams (27 September 1905 – 8 March 1994) was an English professional footballer who played as a forward.
Born in Leytonstone, he became the youngest ever professional at 15 years of age, when in 1921 he signed for West Ham United from Fairbairn House. On 6 May 1922 (making an appearance against Blackpool) at aged 16 years and 221 days, he became West Ham's youngest ever player; a record he held until Reece Oxford made his debut 23 days younger in 2015.[1] [2] [3] The forward made 44 appearances in all competitions and scored nine goals for West Ham before joining Chelsea in 1927.[4] He played only one season for Chelsea, playing only two games without scoring.[5]