|Date of birth||31 July 1913|
|Place of birth||Manchester, England|
|Date of death||25 April 1975(aged 61)|
|Height||5 ft 6 in (1.68 m)|
|Playing position||Inside forward|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
Alphonso "Alf" Ainsworth (31 July 1913 – 25 April 1975) was an English professional footballer, whose regular position was at inside forward. During his career, he played for a number of clubs, including Manchester United and New Brighton.
He was born in Manchester.
Ainsworth began his career at Ashton United in the Cheshire County League, but signed for Manchester United as an amateur in 1933. On 13 February 1934, he signed his first professional contract with the club, and made his debut in a home game against Bury on 3 March 1934. However, he only made one more appearance for the club, and joined New Brighton in September 1935, making 150 pre-war appearances and scoring 39 goals for the club.
After World War II broke out in 1939, Ainsworth played for a number of clubs in the wartime leagues. His first wartime club was Accrington Stanley, but he also played for Bury, Rochdale, Southport and Oldham Athletic.
Ainsworth re-registered with New Brighton after the war, and made a further 28 appearances and scored 9 goals. In December 1947, however, Ainsworth transferred to Congleton Town, where he would play until his retirement.