Socialist Labour Party of Croatia (Croatian: Socijalistička radnička partija Hrvatske, also translated Socialist Workers' Party) is a far left Croatian political party with no parliamentary representation. It is often considered to be the leftmost of registered parties in Croatian politics.
The official paper is called Croatian: Socijalizam danas (Socialism Today).
The Party was formed in 1997 by a group of leftists gathered around the newspaper Hrvatska ljevica (Croatian Left) and its chief editor Stipe Šuvar. SLP filled a hole on Croatian political left after Social Democratic Union lost influence and members and Social Democratic Action moved more to the center.
Shortly after, a minority of members left to form Socialist Party of Croatia - Left Alternative, mostly due to personal disputes. The activist core, including the youth wing and the entire editorial board of Hrvatska ljevica (which worked beside the late Stipe Šuvar) is still a part of the SLP.
On last local elections in 2005, SLP formed a joint list with Social Democratic Union, New Alternative Party - Green Movement, Green Left of Croatia and Green Party but did not win any seats in local or regional Assemblies, although it came close in a few bigger towns (like Šibenik, Rijeka and Pula).
The Party attended several International Communist Seminars hosted by the Workers' Party of Belgium and International Conference of Communist & Workers' Parties. It also contains a group called Workers' Struggle (Radnička borba) that is close to the reunified Fourth International.
- The youth section of SLP was called Socialist Youth (Croatia). In 2008 it transformed itself into an autonomous organization called Red Action.
- Party sympathizers include some of Croatian most famous intellectuals such as Predrag Matvejević, Slobodan Šnajder, Lordan Zafranović, Rade Šerbedžija, and Izet Hajdarhodžić. Milan Kangrga was a member, but left the party after the death of Stipe Šuvar. 
- Socialist Labour Party was also the name of the first communist party in Yugoslavia.
- Socialist Labour Party supports new social movements; party delegates have supported Zagreb Pride and the union protests.
- President: Ivan Plješa
- Left of Croatia
- Hrvatska ljevica
- Novi Plamen
- Socialist Labour Party of Yugoslavia (Communists)
- Serbian Party of Socialists (Croatia)
- Socialist Party of Croatia – Left Alternative
- Socialist Party of Croatia
- Social Democratic Union (Croatia)
- RH će biti zemlja 4 milijuna staraca i još toliko Europljana s vikendicama – NACIONAL
- Intervju Dana
- IZBORI 2007
- International Communist Seminar • List of parties and organizations unable to attend or having sent a solidarity message
- Radnička borba - Socijalistička omladina Hrvatske - Blog.hr