diff --git a/changelogs/current.yaml b/changelogs/current.yaml
index 6d938998b49f..49f3a8b719ce 100644
--- a/changelogs/current.yaml
+++ b/changelogs/current.yaml
@@ -24,6 +24,9 @@ removed_config_or_runtime:
 - area: http
   change: |
     Removed runtime guard ``envoy.reloadable_features.http1_balsa_allow_cr_or_lf_at_request_start`` and legacy code paths.
+- area: router
+  change: |
+    Removed runtime guard ``envoy.reloadable_features.enable_new_query_param_present_match_behavior`` and legacy code paths.
 
 new_features:
 
diff --git a/source/common/router/config_utility.cc b/source/common/router/config_utility.cc
index 7282c102875c..52820bc0c2fd 100644
--- a/source/common/router/config_utility.cc
+++ b/source/common/router/config_utility.cc
@@ -50,10 +50,8 @@ bool ConfigUtility::QueryParameterMatcher::matches(
   auto data = request_query_params.getFirstValue(name_);
 
   // If we're doing a present_match, return whether the parameter exists and matches the expected
-  // presence
-  if (Runtime::runtimeFeatureEnabled(
-          "envoy.reloadable_features.enable_new_query_param_present_match_behavior") &&
-      present_match_.has_value()) {
+  // presence.
+  if (present_match_.has_value()) {
     return data.has_value() == present_match_.value();
   }
 
diff --git a/source/common/runtime/runtime_features.cc b/source/common/runtime/runtime_features.cc
index 70249299a767..d5962e7f52eb 100644
--- a/source/common/runtime/runtime_features.cc
+++ b/source/common/runtime/runtime_features.cc
@@ -40,7 +40,6 @@ RUNTIME_GUARD(envoy_reloadable_features_dfp_cluster_resolves_hosts);
 RUNTIME_GUARD(envoy_reloadable_features_disallow_quic_client_udp_mmsg);
 RUNTIME_GUARD(envoy_reloadable_features_enable_cel_regex_precompilation);
 RUNTIME_GUARD(envoy_reloadable_features_enable_compression_bomb_protection);
-RUNTIME_GUARD(envoy_reloadable_features_enable_new_query_param_present_match_behavior);
 RUNTIME_GUARD(envoy_reloadable_features_ext_proc_fail_close_spurious_resp);
 RUNTIME_GUARD(envoy_reloadable_features_generic_proxy_codec_buffer_limit);
 RUNTIME_GUARD(envoy_reloadable_features_grpc_side_stream_flow_control);
diff --git a/test/extensions/filters/http/router/config_test.cc b/test/extensions/filters/http/router/config_test.cc
index fa84bd6d00d7..541380624507 100644
--- a/test/extensions/filters/http/router/config_test.cc
+++ b/test/extensions/filters/http/router/config_test.cc
@@ -140,96 +140,6 @@ name: debug
   EXPECT_FALSE(matcher.matches(second_match_params));
 }
 
-TEST_F(QueryParameterMatcherTest, PresentMatchTrueWithFeatureEnabled) {
-  TestScopedRuntime scoped_runtime;
-  scoped_runtime.mergeValues(
-      {{"envoy.reloadable_features.enable_new_query_param_present_match_behavior", "true"}});
-
-  const std::string yaml = R"EOF(
-name: debug
-present_match: true
-)EOF";
-
-  auto matcher = createQueryParamMatcher(yaml);
-
-  auto params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=1");
-  EXPECT_TRUE(matcher.matches(params));
-
-  auto empty_value_params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=");
-  EXPECT_TRUE(matcher.matches(empty_value_params));
-
-  auto no_match_params = Http::Utility::QueryParamsMulti::parseQueryString("?other=1");
-  EXPECT_FALSE(matcher.matches(no_match_params));
-}
-
-TEST_F(QueryParameterMatcherTest, PresentMatchTrueWithFeatureDisabled) {
-  TestScopedRuntime scoped_runtime;
-  scoped_runtime.mergeValues(
-      {{"envoy.reloadable_features.enable_new_query_param_present_match_behavior", "false"}});
-
-  const std::string yaml = R"EOF(
-name: debug
-present_match: true
-)EOF";
-
-  auto matcher = createQueryParamMatcher(yaml);
-
-  // When feature is disabled, falls back to normal present check behavior
-  auto params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=1");
-  EXPECT_TRUE(matcher.matches(params)); // Param exists, no string matcher -> true
-
-  auto empty_value_params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=");
-  EXPECT_TRUE(matcher.matches(empty_value_params)); // Param exists, no string matcher -> true
-
-  auto no_match_params = Http::Utility::QueryParamsMulti::parseQueryString("?other=1");
-  EXPECT_FALSE(matcher.matches(no_match_params)); // Param doesn't exist -> false
-}
-
-TEST_F(QueryParameterMatcherTest, PresentMatchFalseWithFeatureEnabled) {
-  TestScopedRuntime scoped_runtime;
-  scoped_runtime.mergeValues(
-      {{"envoy.reloadable_features.enable_new_query_param_present_match_behavior", "true"}});
-
-  const std::string yaml = R"EOF(
-name: debug
-present_match: false
-)EOF";
-
-  auto matcher = createQueryParamMatcher(yaml);
-
-  auto params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=1");
-  EXPECT_FALSE(matcher.matches(params));
-
-  auto empty_value_params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=");
-  EXPECT_FALSE(matcher.matches(empty_value_params));
-
-  auto no_match_params = Http::Utility::QueryParamsMulti::parseQueryString("?other=1");
-  EXPECT_TRUE(matcher.matches(no_match_params));
-}
-
-TEST_F(QueryParameterMatcherTest, PresentMatchFalseWithFeatureDisabled) {
-  TestScopedRuntime scoped_runtime;
-  scoped_runtime.mergeValues(
-      {{"envoy.reloadable_features.enable_new_query_param_present_match_behavior", "false"}});
-
-  const std::string yaml = R"EOF(
-name: debug
-present_match: false
-)EOF";
-
-  auto matcher = createQueryParamMatcher(yaml);
-
-  // When feature is disabled, falls back to normal present check behavior
-  auto params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=1");
-  EXPECT_TRUE(matcher.matches(params)); // Param exists, no string matcher -> true
-
-  auto empty_value_params = Http::Utility::QueryParamsMulti::parseQueryString("?debug=");
-  EXPECT_TRUE(matcher.matches(empty_value_params)); // Param exists, no string matcher -> true
-
-  auto no_match_params = Http::Utility::QueryParamsMulti::parseQueryString("?other=1");
-  EXPECT_FALSE(matcher.matches(no_match_params)); // Param doesn't exist -> false
-}
-
 TEST(RouterFilterConfigTest, SimpleRouterFilterConfig) {
   const std::string yaml_string = R"EOF(
   dynamic_stats: true