Catalan Workers Bloc

{{inline|date=December 2009}}{{onesource|date=June 2024}}

{{Infobox political party

| name = Catalan Workers Bloc

| native_name = Bloc Català dels Treballadors

| colorcode = red

| logo = Estelada roja vertical.svg

| logo_size = 100px

| spokesperson =

| leader1_title = Candidate

| leader1_name =

| slogan =

| founded = {{start date|1978}}

| dissolved = {{end date|1982}}

| headquarters = Barcelona

| newspaper =

| ideology = Communism
Catalan independence

| merger = Party of Labour of Catalonia
Marxist Unification Movement

| position = Left-wing

|seats1_title = Town councillors (1979-1982)

|seats1 = {{Composition bar|1|8223|hex=red}}

| national =

| colors =

| symbol =

| country = Spain

| state = Catalonia

}}

File:BCT_poster.pngCatalan Workers Bloc ({{langx|ca|Bloc Català dels Treballadors}}) was a political party in Catalonia, Spain. Formed in 1978 through the merger of the Party of Labour of Catalonia (PTC) and the Marxist Unification Movement (MUM). BCT participated in the National Liberation Left Bloc (BEAN) in the 1979 general elections.

In 1982 when BEAN was dissolved, BCT dissolved and most of its members joined the Left Nationalists (NE).