| Lou Costello | |
| Fullname: | Mortimer Daniel Costello |
| Birth Date: | 1936 7, df=y |
| Birth Place: | Dagenham, England |
| Death Place: | Doddinghurst, England |
| Position: | Wing half |
| Clubs1: | Leytonstone |
| Years2: | 1956–1957 |
| Caps2: | 28 |
| Goals2: | 7 |
| Years3: | 1957–1965 |
| Clubs3: | Southend United |
| Caps3: | 251 |
| Goals3: | 15 |
| Years4: | 1965–1971 |
| Clubs4: | Chelmsford City |
| Clubs5: | Stevenage Athletic |
Mortimer Daniel Costello (8 July 1936 — 8 August 2012) was an English footballer who played as a wing half.
Costello began his career at Leytonstone, before signing for Aldershot in 1956. Costello remained at Aldershot for a single season, signing for Southend United in 1957.[1] At Southend, Costello played 266 times in all competitions, scoring 15 goals.[2] In 1965, Costello signed for fellow Essex club Chelmsford City. During his time at Chelmsford, Costello made 287 appearances, winning the 1967–68 Southern League in the process.[3] Following his time at Chelmsford, Costello played for Stevenage Athletic.[4]
A tailor by trade, Costello founded Costello Tailors in 1970.[4] [5]