| Billy Watkin | |
| Fullname: | Thomas William Steel Watkin |
| Birth Date: | 14 December 1923 |
| Birth Place: | Grimsby, England |
| Position: | Inside forward |
| Youthclubs1: | Grimsby Town |
| Years1: | 1949–1952 |
| Clubs1: | Grimsby Town |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 1952–1954 |
| Clubs2: | Gateshead |
| Caps2: | 39 |
| Goals2: | 14 |
| Years3: | 1954–1955 |
| Clubs3: | Middlesbrough |
| Caps3: | 11 |
| Goals3: | 2 |
| Years4: | 1955–1956 |
| Clubs4: | Mansfield Town |
| Caps4: | 25 |
| Goals4: | 4 |
Thomas William Steel Watkin (21 September 1932 – 2001) was an English footballer who played as an inside forward.
Watkin was an England schoolboy international who came through the junior ranks at Grimsby Town, signing a professional contract with them in October 1949. In December 1952, Watkin joined Gateshead, scoring a total of 14 goals in 40 league and cup appearances before moving to neighbours Middlesbrough in March 1954, where he scored 2 goals in 11 games. Watkin joined Mansfield Town in June 1955, scoring 5 goals in 26 league and cup games.