The Sheffield Political Union (SPU) was an organisation established to campaign for Parliamentary Reform in Sheffield, England.
It attracted 12,000 members in 1832.
[1] The SPU was founded by "Eleven Poor Men of Hallamshire" as celebrated in a hymn of this name by Ebenezer Elliott.
In May 1833 the SPU originally proposed submitting a "humble prayer" to King William IV to dismiss his ministers and call a new election.
However, when the wording was made somewhat stronger by turning this into a demand, the committee including Elliott, resigned and the union was wound up.