diff --git a/changelogs/unreleased/1741-prydonius b/changelogs/unreleased/1741-prydonius
new file mode 100644
index 000000000..0e10fbbab
--- /dev/null
+++ b/changelogs/unreleased/1741-prydonius
@@ -0,0 +1 @@
+sort output of resource list in `velero backup describe --details`
diff --git a/pkg/backup/request.go b/pkg/backup/request.go
index 5ec9bc778..a44c8f00e 100644
--- a/pkg/backup/request.go
+++ b/pkg/backup/request.go
@@ -18,6 +18,7 @@ package backup
 
 import (
 	"fmt"
+	"sort"
 
 	velerov1api "github.com/heptio/velero/pkg/apis/velero/v1"
 	"github.com/heptio/velero/pkg/util/collections"
@@ -58,5 +59,11 @@ func (r *Request) BackupResourceList() map[string][]string {
 		}
 		resources[i.resource] = append(resources[i.resource], entry)
 	}
+
+	// sort namespace/name entries for each GVK
+	for _, v := range resources {
+		sort.Strings(v)
+	}
+
 	return resources
 }
diff --git a/pkg/backup/request_test.go b/pkg/backup/request_test.go
index f37434059..9b04f0b53 100644
--- a/pkg/backup/request_test.go
+++ b/pkg/backup/request_test.go
@@ -50,9 +50,33 @@ func TestRequest_BackupResourceList(t *testing.T) {
 	}
 
 	req := Request{BackedUpItems: backedUpItems}
-	assert.Equal(t, req.BackupResourceList(), map[string][]string{
+	assert.Equal(t, map[string][]string{
 		"apps/v1/Deployment":  {"default/my-deploy"},
 		"v1/Pod":              {"ns1/pod1", "ns2/pod2"},
 		"v1/PersistentVolume": {"my-pv"},
-	})
+	}, req.BackupResourceList())
+}
+
+func TestRequest_BackupResourceListEntriesSorted(t *testing.T) {
+	items := []itemKey{
+		{
+			resource:  "v1/Pod",
+			name:      "pod2",
+			namespace: "ns2",
+		},
+		{
+			resource:  "v1/Pod",
+			name:      "pod1",
+			namespace: "ns1",
+		},
+	}
+	backedUpItems := map[itemKey]struct{}{}
+	for _, it := range items {
+		backedUpItems[it] = struct{}{}
+	}
+
+	req := Request{BackedUpItems: backedUpItems}
+	assert.Equal(t, map[string][]string{
+		"v1/Pod": {"ns1/pod1", "ns2/pod2"},
+	}, req.BackupResourceList())
 }
diff --git a/pkg/cmd/util/output/backup_describer.go b/pkg/cmd/util/output/backup_describer.go
index b0a6d997c..c1fd8b1bf 100644
--- a/pkg/cmd/util/output/backup_describer.go
+++ b/pkg/cmd/util/output/backup_describer.go
@@ -284,8 +284,16 @@ func describeBackupResourceList(d *Describer, backup *velerov1api.Backup, velero
 	}
 
 	d.Println("Resource List:")
-	for gvk, items := range resourceList {
-		d.Printf("\t%s:\n\t\t- %s\n", gvk, strings.Join(items, "\n\t\t- "))
+
+	// Sort GVKs in output
+	gvks := make([]string, 0, len(resourceList))
+	for gvk := range resourceList {
+		gvks = append(gvks, gvk)
+	}
+	sort.Strings(gvks)
+
+	for _, gvk := range gvks {
+		d.Printf("\t%s:\n\t\t- %s\n", gvk, strings.Join(resourceList[gvk], "\n\t\t- "))
 	}
 }