The Conspiracy and Protection of Property Act 1875 (38 & 39 Vict.

c. 86) is an Act of the Parliament of the United Kingdom relating to labour relations, which together with the Employers and Workmen Act 1875, fully decriminalised the work of trade unions.

Based on an extension of the conclusions of the Cockburn Commission, it was introduced by a Conservative government under Benjamin Disraeli.

[2] This meant that labour disputes were civil matters, not for consideration by criminal courts.

The provisions of the Conspiracy and Protection of Property Act 1878 of South Australia,[5] the Conspiracy and Protection of Property Act 1889 of Tasmania,[6] and the Conspiracy and Protection of Property Act 1900 of Western Australia,[7] were derived from the Conspiracy and Protection of Property Act 1875.