diff --git a/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart b/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart
index c63993a5c0d..3e195ddfa08 100644
--- a/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart
+++ b/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart
@@ -205,6 +205,13 @@ enum ExperimentalFlag {
       isExpired: false,
       experimentEnabledVersion: defaultLanguageVersion,
       experimentReleasedVersion: defaultLanguageVersion),
+
+  wildcardVariables(
+      name: 'wildcard-variables',
+      isEnabledByDefault: false,
+      isExpired: false,
+      experimentEnabledVersion: defaultLanguageVersion,
+      experimentReleasedVersion: defaultLanguageVersion),
   ;
 
   final String name;
diff --git a/pkg/analyzer/lib/dart/analysis/features.dart b/pkg/analyzer/lib/dart/analysis/features.dart
index ffc7d7e3874..8a20789d776 100644
--- a/pkg/analyzer/lib/dart/analysis/features.dart
+++ b/pkg/analyzer/lib/dart/analysis/features.dart
@@ -84,6 +84,9 @@ abstract class Feature {
   /// Feature information for variance.
   static final variance = ExperimentalFeatures.variance;
 
+  /// Feature information for wildcard variables.
+  static final wildcard_variables = ExperimentalFeatures.wildcard_variables;
+
   /// If the feature may be enabled or disabled on the command line, the
   /// experimental flag that may be used to enable it.  Otherwise `null`.
   ///
diff --git a/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart b/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart
index 8776192430a..ce4fd493320 100644
--- a/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart
@@ -47,6 +47,7 @@ final _knownFeatures = <String, ExperimentalFeature>{
   EnableString.triple_shift: ExperimentalFeatures.triple_shift,
   EnableString.unnamed_libraries: ExperimentalFeatures.unnamed_libraries,
   EnableString.variance: ExperimentalFeatures.variance,
+  EnableString.wildcard_variables: ExperimentalFeatures.wildcard_variables,
 };
 
 /// Constant strings for enabling each of the currently known experimental
@@ -135,6 +136,9 @@ class EnableString {
 
   /// String to enable the experiment "variance"
   static const String variance = 'variance';
+
+  /// String to enable the experiment "wildcard-variables"
+  static const String wildcard_variables = 'wildcard-variables';
 }
 
 class ExperimentalFeatures {
@@ -423,6 +427,17 @@ class ExperimentalFeatures {
     experimentalReleaseVersion: null,
     releaseVersion: null,
   );
+
+  static final wildcard_variables = ExperimentalFeature(
+    index: 28,
+    enableString: EnableString.wildcard_variables,
+    isEnabledByDefault: IsEnabledByDefault.wildcard_variables,
+    isExpired: IsExpired.wildcard_variables,
+    documentation:
+        'Local declarations and parameters named `_` are non-binding.',
+    experimentalReleaseVersion: null,
+    releaseVersion: null,
+  );
 }
 
 /// Constant bools indicating whether each experimental flag is currently
@@ -511,6 +526,9 @@ class IsEnabledByDefault {
 
   /// Default state of the experiment "variance"
   static const bool variance = false;
+
+  /// Default state of the experiment "wildcard-variables"
+  static const bool wildcard_variables = false;
 }
 
 /// Constant bools indicating whether each experimental flag is currently
@@ -600,6 +618,9 @@ class IsExpired {
 
   /// Expiration status of the experiment "variance"
   static const bool variance = false;
+
+  /// Expiration status of the experiment "wildcard-variables"
+  static const bool wildcard_variables = false;
 }
 
 mixin _CurrentState {
@@ -699,5 +720,9 @@ mixin _CurrentState {
   /// Current state for the flag "variance"
   bool get variance => isEnabled(ExperimentalFeatures.variance);
 
+  /// Current state for the flag "wildcard-variables"
+  bool get wildcard_variables =>
+      isEnabled(ExperimentalFeatures.wildcard_variables);
+
   bool isEnabled(covariant ExperimentalFeature feature);
 }
diff --git a/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart b/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart
index c98c4665709..a4cbe069412 100644
--- a/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart
+++ b/pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart
@@ -282,6 +282,14 @@ class ExperimentalFlag {
       enabledVersion: defaultLanguageVersion,
       experimentEnabledVersion: defaultLanguageVersion,
       experimentReleasedVersion: defaultLanguageVersion);
+
+  static const ExperimentalFlag wildcardVariables = const ExperimentalFlag(
+      name: 'wildcard-variables',
+      isEnabledByDefault: false,
+      isExpired: false,
+      enabledVersion: defaultLanguageVersion,
+      experimentEnabledVersion: defaultLanguageVersion,
+      experimentReleasedVersion: defaultLanguageVersion);
 }
 
 /// Interface for accessing the global state of experimental features.
@@ -445,6 +453,10 @@ class GlobalFeatures {
   GlobalFeature? _variance;
   GlobalFeature get variance =>
       _variance ??= _computeGlobalFeature(ExperimentalFlag.variance);
+
+  GlobalFeature? _wildcardVariables;
+  GlobalFeature get wildcardVariables => _wildcardVariables ??=
+      _computeGlobalFeature(ExperimentalFlag.wildcardVariables);
 }
 
 /// Interface for accessing the state of experimental features within a
@@ -610,6 +622,11 @@ class LibraryFeatures {
       _variance ??= globalFeatures._computeLibraryFeature(
           ExperimentalFlag.variance, canonicalUri, libraryVersion);
 
+  LibraryFeature? _wildcardVariables;
+  LibraryFeature get wildcardVariables =>
+      _wildcardVariables ??= globalFeatures._computeLibraryFeature(
+          ExperimentalFlag.wildcardVariables, canonicalUri, libraryVersion);
+
   /// Returns the [LibraryFeature] corresponding to [experimentalFlag].
   LibraryFeature fromSharedExperimentalFlags(
       shared.ExperimentalFlag experimentalFlag) {
@@ -670,6 +687,8 @@ class LibraryFeatures {
         return unnamedLibraries;
       case shared.ExperimentalFlag.variance:
         return variance;
+      case shared.ExperimentalFlag.wildcardVariables:
+        return wildcardVariables;
       default:
         throw new UnsupportedError(
             'LibraryFeatures.fromSharedExperimentalFlags($experimentalFlag)');
@@ -737,6 +756,8 @@ ExperimentalFlag? parseExperimentalFlag(String flag) {
       return ExperimentalFlag.unnamedLibraries;
     case "variance":
       return ExperimentalFlag.variance;
+    case "wildcard-variables":
+      return ExperimentalFlag.wildcardVariables;
   }
   return null;
 }
@@ -791,6 +812,8 @@ final Map<ExperimentalFlag, bool> defaultExperimentalFlags = {
   ExperimentalFlag.unnamedLibraries:
       ExperimentalFlag.unnamedLibraries.isEnabledByDefault,
   ExperimentalFlag.variance: ExperimentalFlag.variance.isEnabledByDefault,
+  ExperimentalFlag.wildcardVariables:
+      ExperimentalFlag.wildcardVariables.isEnabledByDefault,
 };
 const AllowedExperimentalFlags defaultAllowedExperimentalFlags =
     const AllowedExperimentalFlags(
@@ -832,4 +855,5 @@ const Map<shared.ExperimentalFlag, ExperimentalFlag> sharedExperimentalFlags = {
   shared.ExperimentalFlag.tripleShift: ExperimentalFlag.tripleShift,
   shared.ExperimentalFlag.unnamedLibraries: ExperimentalFlag.unnamedLibraries,
   shared.ExperimentalFlag.variance: ExperimentalFlag.variance,
+  shared.ExperimentalFlag.wildcardVariables: ExperimentalFlag.wildcardVariables,
 };
diff --git a/tools/experimental_features.yaml b/tools/experimental_features.yaml
index db590fa6dbc..76ad4692afd 100644
--- a/tools/experimental_features.yaml
+++ b/tools/experimental_features.yaml
@@ -128,6 +128,9 @@ features:
   resource-identifiers:
     help: "Output arguments used by static functions."
 
+  wildcard-variables:
+    help: "Local declarations and parameters named `_` are non-binding."
+
 # Experiment flag only used for testing.
   test-experiment:
     help: >-