Willet Ball (1873 – 1 June 1962) was a British journalist, trade unionist and political activist.

[1] In September 1900 Ball he became a full-time sub-editor for the NUR's newly-established weekly newspaper, The Railway Review, writing for the journal under the nom-de-plume of 'Sphere'.

The Railway Review included reports from NUR branches from around the country, acting as a community voice for the railwaymen union members.

Ball was selected as the Labour candidate to contest the seat of Luton in the general election of December 1918, immediately after hostilities had ended.

He was later described as "a trade union journalist who was a born fighter but in those days usually spoke with more bitterness than persuasion".