diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributes.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributes.java
index 52c66a44856e..b468c18f4593 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributes.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributes.java
@@ -99,6 +99,7 @@ public void applyTo(BiConsumer<String, String> consumer) {
 		});
 		attributes.computeIfAbsent("service.name", (k) -> getApplicationName());
 		attributes.computeIfAbsent("service.group", (k) -> getApplicationGroup());
+		attributes.computeIfAbsent("service.namespace", (key) -> getServiceNamespace());
 		attributes.forEach(consumer);
 	}
 
@@ -106,11 +107,18 @@ private String getApplicationName() {
 		return this.environment.getProperty("spring.application.name", DEFAULT_SERVICE_NAME);
 	}
 
+	@Deprecated(since = "3.5.0", forRemoval = true)
+	// See https://github.com/spring-projects/spring-boot/issues/44411 for potential
+	// information about deprecation of "service.group" attribute
 	private String getApplicationGroup() {
 		String applicationGroup = this.environment.getProperty("spring.application.group");
 		return (StringUtils.hasLength(applicationGroup)) ? applicationGroup : null;
 	}
 
+	private String getServiceNamespace() {
+		return this.environment.getProperty("spring.application.group");
+	}
+
 	/**
 	 * Parses resource attributes from the {@link System#getenv()}. This method fetches
 	 * attributes defined in the {@code OTEL_RESOURCE_ATTRIBUTES} and
diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryAutoConfigurationTests.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryAutoConfigurationTests.java
index 14ab7b3c6380..dba908b68191 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryAutoConfigurationTests.java
@@ -106,6 +106,22 @@ void shouldNotApplySpringApplicationGroupIfNotSet() {
 		});
 	}
 
+	@Test
+	void shouldApplyServiceNamespaceIfApplicationGroupIsSet() {
+		this.runner.withPropertyValues("spring.application.group=my-group").run((context) -> {
+			Resource resource = context.getBean(Resource.class);
+			assertThat(resource.getAttributes().asMap()).containsEntry(AttributeKey.stringKey("service.namespace"), "my-group");
+		});
+	}
+
+	@Test
+	void shouldNOtApplyServiceNamespaceIfApplicationGroupIsNotSet() {
+		this.runner.run((context -> {
+			Resource resource = context.getBean(Resource.class);
+			assertThat(resource.getAttributes().asMap()).doesNotContainKey(AttributeKey.stringKey("service.namespace"));
+		}));
+	}
+
 	@Test
 	void shouldFallbackToDefaultApplicationNameIfSpringApplicationNameIsNotSet() {
 		this.runner.run((context) -> {
diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributesTests.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributesTests.java
index 61527264b998..f19f74f82ec8 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributesTests.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributesTests.java
@@ -156,9 +156,10 @@ void unknownServiceShouldBeUsedAsDefaultServiceName() {
 	@Test
 	void springApplicationGroupNameShouldBeUsedAsDefaultServiceGroup() {
 		this.environment.setProperty("spring.application.group", "spring-boot");
-		assertThat(getAttributes()).hasSize(2)
+		assertThat(getAttributes()).hasSize(3)
 			.containsEntry("service.name", "unknown_service")
-			.containsEntry("service.group", "spring-boot");
+			.containsEntry("service.group", "spring-boot")
+			.containsEntry("service.namespace", "spring-boot");
 	}
 
 	@Test
@@ -167,6 +168,11 @@ void springApplicationNameShouldBeUsedAsDefaultServiceName() {
 		assertThat(getAttributes()).hasSize(1).containsEntry("service.name", "spring-boot-app");
 	}
 
+	@Test
+	void serviceNamespaceShouldNotBePresentByDefault() {
+		assertThat(getAttributes()).hasSize(1).doesNotContainKey("service.namespace");
+	}
+
 	@Test
 	void resourceAttributesShouldTakePrecedenceOverSpringApplicationName() {
 		this.resourceAttributes.put("service.name", "spring-boot");
@@ -192,18 +198,50 @@ void otelServiceNameShouldTakePrecedenceOverSpringApplicationName() {
 	void resourceAttributesShouldTakePrecedenceOverSpringApplicationGroupName() {
 		this.resourceAttributes.put("service.group", "spring-boot-app");
 		this.environment.setProperty("spring.application.group", "spring-boot");
-		assertThat(getAttributes()).hasSize(2)
+		assertThat(getAttributes()).hasSize(3)
 			.containsEntry("service.name", "unknown_service")
 			.containsEntry("service.group", "spring-boot-app");
 	}
 
+	@Test
+	void resourceAttributesShouldTakePrecedenceOverApplicationGroupNameForPopulatingServiceNamespace() {
+		this.resourceAttributes.put("service.namespace", "spring-boot-app");
+		this.environment.setProperty("spring.application.group", "overriden");
+		assertThat(getAttributes()).hasSize(3)
+			.containsEntry("service.name", "unknown_service")
+			.containsEntry("service.group", "overriden")
+			.containsEntry("service.namespace", "spring-boot-app");
+	}
+
 	@Test
 	void otelResourceAttributesShouldTakePrecedenceOverSpringApplicationGroupName() {
 		this.environmentVariables.put("OTEL_RESOURCE_ATTRIBUTES", "service.group=spring-boot");
 		this.environment.setProperty("spring.application.group", "spring-boot-app");
-		assertThat(getAttributes()).hasSize(2)
+		assertThat(getAttributes()).hasSize(3)
 			.containsEntry("service.name", "unknown_service")
-			.containsEntry("service.group", "spring-boot");
+			.containsEntry("service.group", "spring-boot")
+			.containsEntry("service.namespace", "spring-boot-app");
+	}
+
+	@Test
+	void otelResourceAttributesShouldTakePrecedenceOverSpringApplicationGroupNameForServiceNamespace() {
+		this.environmentVariables.put("OTEL_RESOURCE_ATTRIBUTES", "service.namespace=spring-boot");
+		this.environment.setProperty("spring.application.group", "overriden");
+		;
+		assertThat(getAttributes()).hasSize(3)
+			.containsEntry("service.group", "overriden")
+			.containsEntry("service.namespace", "spring-boot");
+	}
+
+	@Test
+	void shouldUseServiceGroupForServiceNamespaceIfServiceGroupIsSet() {
+		this.environment.setProperty("spring.application.group", "alpha");
+		assertThat(getAttributes()).containsEntry("service.namespace", "alpha");
+	}
+
+	@Test
+	void shouldNotSetServiceNamespaceIfServiceGroupIsNotSet() {
+		assertThat(getAttributes()).doesNotContainKey("service.namespace");
 	}
 
 	private Map<String, String> getAttributes() {