diff --git a/viper.go b/viper.go
index 30ae4aa..3c5ab6d 100644
--- a/viper.go
+++ b/viper.go
@@ -34,6 +34,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/deckarep/golang-set"
 	"github.com/fsnotify/fsnotify"
 	"github.com/go-viper/mapstructure/v2"
 	"github.com/spf13/afero"
@@ -1894,6 +1895,32 @@ func (v *Viper) AllKeys() []string {
 	return a
 }
 
+// Get the set of all top level keys.
+func TopLevelKeys() []string { return v.TopLevelKeys() }
+func (v *Viper) TopLevelKeys() []string {
+	s := mapset.NewSetFromSlice(v.getMapKeys(castMapStringToMapInterface(v.aliases)))
+	s = s.Union(mapset.NewSetFromSlice(v.getMapKeys(v.override)))
+	s = s.Union(mapset.NewSetFromSlice(v.getMapKeys(castMapFlagToMapInterface(v.pflags))))
+	s = s.Union(mapset.NewSetFromSlice(v.getMapKeys(castMapStringToMapInterface(v.env))))
+	s = s.Union(mapset.NewSetFromSlice(v.getMapKeys(v.config)))
+	s = s.Union(mapset.NewSetFromSlice(v.getMapKeys(v.defaults)))
+
+	// convert interface{} to string
+	keys := []string{}
+	for _, k := range s.ToSlice() {
+		keys = append(keys, k.(string))
+	}
+	return keys
+}
+
+func (v *Viper) getMapKeys(m map[string]interface{}) []interface{} {
+	keys := []interface{}{}
+	for key := range m {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
 // flattenAndMergeMap recursively flattens the given map into a map[string]bool
 // of key paths (used as a set, easier to manipulate than a []string):
 //   - each path is merged into a single key string, delimited with v.keyDelim
diff --git a/viper_test.go b/viper_test.go
index 2edc83f..b5429fb 100644
--- a/viper_test.go
+++ b/viper_test.go
@@ -52,6 +52,23 @@ var yamlExampleWithExtras = []byte(`Existing: true
 Bogus: true
 `)
 
+var yamlTopLevelKeys = []byte(`
+restuarants:
+  types:
+    sushi:
+      name: sushi2go
+      rating: 10
+      price: average
+    italian:
+      name: "pizza place"
+      rating: 7
+      price: average
+    thai:
+      name: "thai garden"
+      rating: 9
+      price: high
+`)
+
 type testUnmarshalExtra struct {
 	Existing bool
 }
@@ -971,6 +988,35 @@ func TestAllKeysWithEnv(t *testing.T) {
 	assert.ElementsMatch(t, []string{"id", "foo.bar"}, v.AllKeys())
 }
 
+func TestTopLevelKeys(t *testing.T) {
+	v := New()
+	v.SetConfigType("yaml")
+	r := bytes.NewReader(yamlTopLevelKeys)
+	err := v.ReadConfig(r)
+	assert.NoError(t, err)
+	fmt.Printf("%#v\n", v.config)
+	s := v.Sub("restuarants.types")
+	for _, i := range s.TopLevelKeys() {
+		ss := s.Sub(i)
+		switch i {
+		case "sushi":
+			assert.Equal(t, ss.GetString("name"), "sushi2go")
+			assert.Equal(t, ss.GetString("price"), "average")
+			assert.Equal(t, ss.GetInt("rating"), 10)
+		case "italian":
+			assert.Equal(t, ss.GetString("name"), "pizza place")
+			assert.Equal(t, ss.GetString("price"), "average")
+			assert.Equal(t, ss.GetInt("rating"), 7)
+		case "thai":
+			assert.Equal(t, ss.GetString("name"), "thai garden")
+			assert.Equal(t, ss.GetString("price"), "high")
+			assert.Equal(t, ss.GetInt("rating"), 9)
+		default:
+			t.Fatalf("unexpected key, %q", i)
+		}
+	}
+}
+
 func TestAliasesOfAliases(t *testing.T) {
 	v := New()
 	v.Set("Title", "Checking Case")