diff --git a/pkg/cmd/taskrun/delete.go b/pkg/cmd/taskrun/delete.go
index aded57b77b..c13714eca5 100644
--- a/pkg/cmd/taskrun/delete.go
+++ b/pkg/cmd/taskrun/delete.go
@@ -15,6 +15,7 @@
 package taskrun
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"strings"
@@ -92,6 +93,11 @@ or
 				Err: cmd.OutOrStderr(),
 			}
 
+			output, err := cmd.LocalFlags().GetString("output")
+			if err != nil {
+				return err
+			}
+
 			if deleteOpts.TaskName != "" {
 				opts.ParentResource = "Task"
 				opts.ParentResourceName = deleteOpts.TaskName
@@ -122,11 +128,13 @@ or
 				return errs
 			}
 
-			if err := opts.CheckOptions(s, availableTrs, p.Namespace()); err != nil {
-				return err
+			if output != "json" {
+				if err := opts.CheckOptions(s, availableTrs, p.Namespace()); err != nil {
+					return err
+				}
 			}
 
-			if err := deleteTaskRuns(s, p, availableTrs, opts); err != nil {
+			if err := deleteTaskRuns(s, p, availableTrs, opts, output); err != nil {
 				return err
 			}
 			return errs
@@ -144,7 +152,7 @@ or
 	return c
 }
 
-func deleteTaskRuns(s *cli.Stream, p cli.Params, trNames []string, opts *options.DeleteOptions) error {
+func deleteTaskRuns(s *cli.Stream, p cli.Params, trNames []string, opts *options.DeleteOptions, output string) error {
 	var numberOfDeletedTr, numberOfKeptTr int
 	cs, err := p.Clients()
 	if err != nil {
@@ -179,7 +187,7 @@ func deleteTaskRuns(s *cli.Stream, p cli.Params, trNames []string, opts *options
 			if !prFinished && opts.ForceDelete {
 				fmt.Fprintf(s.Out, "warning: Taskrun %s related pipelinerun still running.\n", tr.Name)
 			}
-			if !prFinished && !opts.ForceDelete {
+			if !prFinished && !opts.ForceDelete && output != "json" {
 				fmt.Fprintf(s.Out, "TaskRun(s): %s attached to PipelineRun is still running deleting will restart the completed taskrun. Proceed (y/n): ", tr.Name)
 				if err := opts.TakeInput(s, ""); err != nil {
 					continue
@@ -222,6 +230,16 @@ func deleteTaskRuns(s *cli.Stream, p cli.Params, trNames []string, opts *options
 		d.DeleteRelated([]string{opts.ParentResourceName})
 	}
 
+	if output == "json" {
+		result := struct {
+			Deleted []string `json:"deleted"`
+		}{
+			Deleted: d.SuccessfulDeletes(),
+		}
+
+		return json.NewEncoder(s.Out).Encode(result)
+	}
+
 	if !opts.DeleteAllNs {
 		if d.Errors() == nil {
 			switch {
diff --git a/pkg/cmd/taskrun/delete_test.go b/pkg/cmd/taskrun/delete_test.go
index 061853d43d..01471e8bf6 100644
--- a/pkg/cmd/taskrun/delete_test.go
+++ b/pkg/cmd/taskrun/delete_test.go
@@ -572,6 +572,26 @@ func TestTaskRunDelete_v1beta1(t *testing.T) {
 			wantError:   false,
 			want:        "All 6 TaskRuns associated with Task \"random\" deleted in namespace \"ns\"\n",
 		},
+		{
+			name:        "With JSON output",
+			command:     []string{"rm", "tr0-1", "-n", "ns", "-o", "json"},
+			dynamic:     seeds[15].dynamicClient,
+			input:       seeds[15].pipelineClient,
+			inputStream: nil,
+			wantError:   false,
+			want: `{"deleted":["tr0-1"]}
+`,
+		},
+		{
+			name:        "With JSON output for multiple TaskRuns",
+			command:     []string{"rm", "tr0-1", "tr0-2", "-n", "ns", "-o", "json"},
+			dynamic:     seeds[16].dynamicClient,
+			input:       seeds[16].pipelineClient,
+			inputStream: strings.NewReader("y\n"),
+			wantError:   false,
+			want: `{"deleted":["tr0-1","tr0-2"]}
+`,
+		},
 	}
 
 	for _, tp := range testParams {
diff --git a/pkg/deleter/deleter.go b/pkg/deleter/deleter.go
index 016b33b4b1..2872f68284 100644
--- a/pkg/deleter/deleter.go
+++ b/pkg/deleter/deleter.go
@@ -104,6 +104,14 @@ func (d *Deleter) PrintSuccesses(streams *cli.Stream) {
 	}
 }
 
+func (d *Deleter) SuccessfulDeletes() []string {
+	return d.successfulDeletes
+}
+
+func (d *Deleter) SuccessfulRelatedDeletes() []string {
+	return d.successfulRelatedDeletes
+}
+
 // appendError adds that error to the list of accumulated errors that
 // have occurred during execution.
 func (d *Deleter) appendError(err error) {
diff --git a/pkg/deleter/deleter_test.go b/pkg/deleter/deleter_test.go
index 391bfe9bf9..054c22324b 100644
--- a/pkg/deleter/deleter_test.go
+++ b/pkg/deleter/deleter_test.go
@@ -1,6 +1,7 @@
 package deleter
 
 import (
+	"reflect"
 	"strings"
 	"testing"
 
@@ -50,6 +51,29 @@ func TestDelete(t *testing.T) {
 	}
 }
 
+func TestSuccessfulDeletes(t *testing.T) {
+	d := New("FooBar", successfulDeleteFunc())
+	d.Delete([]string{"foo", "bar"})
+
+	expected := []string{"foo", "bar"}
+	if got := d.SuccessfulDeletes(); !reflect.DeepEqual(got, expected) {
+		t.Errorf("expected %v, received %v", expected, got)
+	}
+}
+
+func TestSuccessfulRelatedDeletes(t *testing.T) {
+	d := New("FooBar", successfulDeleteFunc())
+	d.WithRelated("FooBarRun", successfulListFunc("fbr1", "fbr2"), successfulDeleteFunc())
+
+	deletedNames := d.Delete([]string{"foo"})
+	d.DeleteRelated(deletedNames)
+
+	expected := []string{"fbr1", "fbr2"}
+	if got := d.SuccessfulRelatedDeletes(); !reflect.DeepEqual(got, expected) {
+		t.Errorf("expected %v, received %v", expected, got)
+	}
+}
+
 func TestDeleteRelated(t *testing.T) {
 	for _, tc := range []struct {
 		description string