diff --git a/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart b/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart
index c9030d13260..8a486532925 100644
--- a/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart
+++ b/pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart
@@ -234,6 +234,14 @@ enum ExperimentalFlag {
     experimentReleasedVersion: const Version(3, 0),
   ),
 
+  privateNamedParameters(
+    name: 'private-named-parameters',
+    isEnabledByDefault: false,
+    isExpired: false,
+    experimentEnabledVersion: defaultLanguageVersion,
+    experimentReleasedVersion: defaultLanguageVersion,
+  ),
+
   recordUse(
     name: 'record-use',
     isEnabledByDefault: false,
diff --git a/pkg/analyzer/api.txt b/pkg/analyzer/api.txt
index ec10341bace..d11f86df1f1 100644
--- a/pkg/analyzer/api.txt
+++ b/pkg/analyzer/api.txt
@@ -409,6 +409,7 @@ package:analyzer/dart/analysis/features.dart:
     nonfunction_type_aliases (static getter: ExperimentalFeature)
     null_aware_elements (static getter: ExperimentalFeature)
     patterns (static getter: ExperimentalFeature)
+    private_named_parameters (static getter: ExperimentalFeature)
     records (static getter: ExperimentalFeature)
     sealed_class (static getter: ExperimentalFeature)
     set_literals (static getter: ExperimentalFeature)
diff --git a/pkg/analyzer/lib/dart/analysis/features.dart b/pkg/analyzer/lib/dart/analysis/features.dart
index a4663a1b8bc..6923559fd17 100644
--- a/pkg/analyzer/lib/dart/analysis/features.dart
+++ b/pkg/analyzer/lib/dart/analysis/features.dart
@@ -81,6 +81,10 @@ abstract class Feature {
   /// Feature information for patterns.
   static final patterns = ExperimentalFeatures.patterns;
 
+  /// Feature information for private named parameters.
+  static final private_named_parameters =
+      ExperimentalFeatures.private_named_parameters;
+
   /// Feature information for records.
   static final records = ExperimentalFeatures.records;
 
diff --git a/pkg/analyzer/lib/src/dart/analysis/driver.dart b/pkg/analyzer/lib/src/dart/analysis/driver.dart
index 0b3a236f704..35341d1b4b2 100644
--- a/pkg/analyzer/lib/src/dart/analysis/driver.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/driver.dart
@@ -107,7 +107,7 @@ testFineAfterLibraryAnalyzerHook;
 // TODO(scheglov): Clean up the list of implicitly analyzed files.
 class AnalysisDriver {
   /// The version of data format, should be incremented on every format change.
-  static const int DATA_VERSION = 572;
+  static const int DATA_VERSION = 573;
 
   /// The number of exception contexts allowed to write. Once this field is
   /// zero, we stop writing any new exception contexts in this process.
diff --git a/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart b/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart
index 921e8e2a569..b8b4940c072 100644
--- a/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/experiments.g.dart
@@ -49,6 +49,8 @@ final _knownFeatures = <String, ExperimentalFeature>{
       ExperimentalFeatures.nonfunction_type_aliases,
   EnableString.null_aware_elements: ExperimentalFeatures.null_aware_elements,
   EnableString.patterns: ExperimentalFeatures.patterns,
+  EnableString.private_named_parameters:
+      ExperimentalFeatures.private_named_parameters,
   EnableString.record_use: ExperimentalFeatures.record_use,
   EnableString.records: ExperimentalFeatures.records,
   EnableString.sealed_class: ExperimentalFeatures.sealed_class,
@@ -152,6 +154,9 @@ class EnableString {
   /// String to enable the experiment "patterns"
   static const String patterns = 'patterns';
 
+  /// String to enable the experiment "private-named-parameters"
+  static const String private_named_parameters = 'private-named-parameters';
+
   /// String to enable the experiment "record-use"
   static const String record_use = 'record-use';
 
@@ -511,8 +516,20 @@ class ExperimentalFeatures {
     channels: ["stable", "beta", "dev", "main"],
   );
 
-  static final record_use = ExperimentalFeature(
+  static final private_named_parameters = ExperimentalFeature(
     index: 28,
+    enableString: EnableString.private_named_parameters,
+    isEnabledByDefault: IsEnabledByDefault.private_named_parameters,
+    isExpired: IsExpired.private_named_parameters,
+    documentation:
+        'Allow named parameters with private names that refer to fields.',
+    experimentalReleaseVersion: null,
+    releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
+  );
+
+  static final record_use = ExperimentalFeature(
+    index: 29,
     enableString: EnableString.record_use,
     isEnabledByDefault: IsEnabledByDefault.record_use,
     isExpired: IsExpired.record_use,
@@ -523,7 +540,7 @@ class ExperimentalFeatures {
   );
 
   static final records = ExperimentalFeature(
-    index: 29,
+    index: 30,
     enableString: EnableString.records,
     isEnabledByDefault: IsEnabledByDefault.records,
     isExpired: IsExpired.records,
@@ -534,7 +551,7 @@ class ExperimentalFeatures {
   );
 
   static final sealed_class = ExperimentalFeature(
-    index: 30,
+    index: 31,
     enableString: EnableString.sealed_class,
     isEnabledByDefault: IsEnabledByDefault.sealed_class,
     isExpired: IsExpired.sealed_class,
@@ -545,7 +562,7 @@ class ExperimentalFeatures {
   );
 
   static final set_literals = ExperimentalFeature(
-    index: 31,
+    index: 32,
     enableString: EnableString.set_literals,
     isEnabledByDefault: IsEnabledByDefault.set_literals,
     isExpired: IsExpired.set_literals,
@@ -556,7 +573,7 @@ class ExperimentalFeatures {
   );
 
   static final sound_flow_analysis = ExperimentalFeature(
-    index: 32,
+    index: 33,
     enableString: EnableString.sound_flow_analysis,
     isEnabledByDefault: IsEnabledByDefault.sound_flow_analysis,
     isExpired: IsExpired.sound_flow_analysis,
@@ -568,7 +585,7 @@ class ExperimentalFeatures {
   );
 
   static final spread_collections = ExperimentalFeature(
-    index: 33,
+    index: 34,
     enableString: EnableString.spread_collections,
     isEnabledByDefault: IsEnabledByDefault.spread_collections,
     isExpired: IsExpired.spread_collections,
@@ -579,7 +596,7 @@ class ExperimentalFeatures {
   );
 
   static final static_extensions = ExperimentalFeature(
-    index: 34,
+    index: 35,
     enableString: EnableString.static_extensions,
     isEnabledByDefault: IsEnabledByDefault.static_extensions,
     isExpired: IsExpired.static_extensions,
@@ -590,7 +607,7 @@ class ExperimentalFeatures {
   );
 
   static final super_parameters = ExperimentalFeature(
-    index: 35,
+    index: 36,
     enableString: EnableString.super_parameters,
     isEnabledByDefault: IsEnabledByDefault.super_parameters,
     isExpired: IsExpired.super_parameters,
@@ -601,7 +618,7 @@ class ExperimentalFeatures {
   );
 
   static final test_experiment = ExperimentalFeature(
-    index: 36,
+    index: 37,
     enableString: EnableString.test_experiment,
     isEnabledByDefault: IsEnabledByDefault.test_experiment,
     isExpired: IsExpired.test_experiment,
@@ -613,7 +630,7 @@ class ExperimentalFeatures {
   );
 
   static final triple_shift = ExperimentalFeature(
-    index: 37,
+    index: 38,
     enableString: EnableString.triple_shift,
     isEnabledByDefault: IsEnabledByDefault.triple_shift,
     isExpired: IsExpired.triple_shift,
@@ -624,7 +641,7 @@ class ExperimentalFeatures {
   );
 
   static final unnamed_libraries = ExperimentalFeature(
-    index: 38,
+    index: 39,
     enableString: EnableString.unnamed_libraries,
     isEnabledByDefault: IsEnabledByDefault.unnamed_libraries,
     isExpired: IsExpired.unnamed_libraries,
@@ -635,7 +652,7 @@ class ExperimentalFeatures {
   );
 
   static final unquoted_imports = ExperimentalFeature(
-    index: 39,
+    index: 40,
     enableString: EnableString.unquoted_imports,
     isEnabledByDefault: IsEnabledByDefault.unquoted_imports,
     isExpired: IsExpired.unquoted_imports,
@@ -646,7 +663,7 @@ class ExperimentalFeatures {
   );
 
   static final variance = ExperimentalFeature(
-    index: 40,
+    index: 41,
     enableString: EnableString.variance,
     isEnabledByDefault: IsEnabledByDefault.variance,
     isExpired: IsExpired.variance,
@@ -657,7 +674,7 @@ class ExperimentalFeatures {
   );
 
   static final wildcard_variables = ExperimentalFeature(
-    index: 41,
+    index: 42,
     enableString: EnableString.wildcard_variables,
     isEnabledByDefault: IsEnabledByDefault.wildcard_variables,
     isExpired: IsExpired.wildcard_variables,
@@ -756,6 +773,9 @@ class IsEnabledByDefault {
   /// Default state of the experiment "patterns"
   static const bool patterns = true;
 
+  /// Default state of the experiment "private-named-parameters"
+  static const bool private_named_parameters = false;
+
   /// Default state of the experiment "record-use"
   static const bool record_use = false;
 
@@ -887,6 +907,9 @@ class IsExpired {
   /// Expiration status of the experiment "patterns"
   static const bool patterns = true;
 
+  /// Expiration status of the experiment "private-named-parameters"
+  static const bool private_named_parameters = false;
+
   /// Expiration status of the experiment "record-use"
   static const bool record_use = false;
 
@@ -1029,6 +1052,10 @@ mixin _CurrentState {
   /// Current state for the flag "patterns"
   bool get patterns => isEnabled(ExperimentalFeatures.patterns);
 
+  /// Current state for the flag "private-named-parameters"
+  bool get private_named_parameters =>
+      isEnabled(ExperimentalFeatures.private_named_parameters);
+
   /// Current state for the flag "record-use"
   bool get record_use => isEnabled(ExperimentalFeatures.record_use);
 
diff --git a/pkg/analyzer_testing/lib/experiments/experiments.dart b/pkg/analyzer_testing/lib/experiments/experiments.dart
index 86d64fe7f74..3667c21d0dd 100644
--- a/pkg/analyzer_testing/lib/experiments/experiments.dart
+++ b/pkg/analyzer_testing/lib/experiments/experiments.dart
@@ -19,5 +19,6 @@ List<String> experimentsForTests = [
   Feature.declaring_constructors.enableString,
   Feature.enhanced_parts.enableString,
   Feature.macros.enableString,
+  Feature.private_named_parameters.enableString,
   Feature.variance.enableString,
 ];
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 2efcdffbc88..b3414e89a58 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
@@ -314,6 +314,15 @@ class ExperimentalFlag {
     experimentReleasedVersion: const Version(3, 0),
   );
 
+  static const ExperimentalFlag privateNamedParameters = const ExperimentalFlag(
+    name: 'private-named-parameters',
+    isEnabledByDefault: false,
+    isExpired: false,
+    enabledVersion: defaultLanguageVersion,
+    experimentEnabledVersion: defaultLanguageVersion,
+    experimentReleasedVersion: defaultLanguageVersion,
+  );
+
   static const ExperimentalFlag recordUse = const ExperimentalFlag(
     name: 'record-use',
     isEnabledByDefault: false,
@@ -623,6 +632,10 @@ class GlobalFeatures {
   GlobalFeature get patterns =>
       _patterns ??= _computeGlobalFeature(ExperimentalFlag.patterns);
 
+  GlobalFeature? _privateNamedParameters;
+  GlobalFeature get privateNamedParameters => _privateNamedParameters ??=
+      _computeGlobalFeature(ExperimentalFlag.privateNamedParameters);
+
   GlobalFeature? _recordUse;
   GlobalFeature get recordUse =>
       _recordUse ??= _computeGlobalFeature(ExperimentalFlag.recordUse);
@@ -923,6 +936,14 @@ class LibraryFeatures {
         libraryVersion,
       );
 
+  LibraryFeature? _privateNamedParameters;
+  LibraryFeature get privateNamedParameters =>
+      _privateNamedParameters ??= globalFeatures._computeLibraryFeature(
+        ExperimentalFlag.privateNamedParameters,
+        canonicalUri,
+        libraryVersion,
+      );
+
   LibraryFeature? _recordUse;
   LibraryFeature get recordUse =>
       _recordUse ??= globalFeatures._computeLibraryFeature(
@@ -1096,6 +1117,8 @@ class LibraryFeatures {
         return nullAwareElements;
       case shared.ExperimentalFlag.patterns:
         return patterns;
+      case shared.ExperimentalFlag.privateNamedParameters:
+        return privateNamedParameters;
       case shared.ExperimentalFlag.recordUse:
         return recordUse;
       case shared.ExperimentalFlag.records:
@@ -1188,6 +1211,8 @@ ExperimentalFlag? parseExperimentalFlag(String flag) {
       return ExperimentalFlag.nullAwareElements;
     case "patterns":
       return ExperimentalFlag.patterns;
+    case "private-named-parameters":
+      return ExperimentalFlag.privateNamedParameters;
     case "record-use":
       return ExperimentalFlag.recordUse;
     case "records":
@@ -1274,6 +1299,8 @@ final Map<ExperimentalFlag, bool> defaultExperimentalFlags = {
   ExperimentalFlag.nullAwareElements:
       ExperimentalFlag.nullAwareElements.isEnabledByDefault,
   ExperimentalFlag.patterns: ExperimentalFlag.patterns.isEnabledByDefault,
+  ExperimentalFlag.privateNamedParameters:
+      ExperimentalFlag.privateNamedParameters.isEnabledByDefault,
   ExperimentalFlag.recordUse: ExperimentalFlag.recordUse.isEnabledByDefault,
   ExperimentalFlag.records: ExperimentalFlag.records.isEnabledByDefault,
   ExperimentalFlag.sealedClass: ExperimentalFlag.sealedClass.isEnabledByDefault,
@@ -1341,6 +1368,8 @@ const Map<shared.ExperimentalFlag, ExperimentalFlag> sharedExperimentalFlags = {
       ExperimentalFlag.nonfunctionTypeAliases,
   shared.ExperimentalFlag.nullAwareElements: ExperimentalFlag.nullAwareElements,
   shared.ExperimentalFlag.patterns: ExperimentalFlag.patterns,
+  shared.ExperimentalFlag.privateNamedParameters:
+      ExperimentalFlag.privateNamedParameters,
   shared.ExperimentalFlag.recordUse: ExperimentalFlag.recordUse,
   shared.ExperimentalFlag.records: ExperimentalFlag.records,
   shared.ExperimentalFlag.sealedClass: ExperimentalFlag.sealedClass,
diff --git a/tools/experimental_features.yaml b/tools/experimental_features.yaml
index 640dda8ad7c..b92a1f4534b 100644
--- a/tools/experimental_features.yaml
+++ b/tools/experimental_features.yaml
@@ -164,6 +164,18 @@ features:
   static-extensions:
     help: "Extensions with static capabilities."
 
+  private-named-parameters:
+    help: "Allow named parameters with private names that refer to fields."
+    # TODO(rnystrom): Enable this when the feature is implemented.
+    # validation: |
+    #   class C {
+    #     String _message;
+    #     C({this._message});
+    #   }
+    #   main() {
+    #     print(C(message: 'feature enabled')._message);
+    #   }
+
   declaring-constructors:
     help: "Less verbose constructors."