diff --git a/sentry_sdk/client.py b/sentry_sdk/client.py
index aecbd68ccd..1d1bd22dc4 100644
--- a/sentry_sdk/client.py
+++ b/sentry_sdk/client.py
@@ -934,7 +934,7 @@ def _capture_log(self, log: "Optional[Log]") -> None:
             log["attributes"]["sentry.trace.parent_span_id"] = span_id
 
         # The user, if present, is always set on the isolation scope.
-        if isolation_scope._user is not None:
+        if self.should_send_default_pii() and isolation_scope._user is not None:
             for log_attribute, user_attribute in (
                 ("user.id", "id"),
                 ("user.name", "username"),
@@ -998,7 +998,7 @@ def _capture_metric(self, metric: "Optional[Metric]") -> None:
         if span_id is not None:
             metric["span_id"] = span_id
 
-        if isolation_scope._user is not None:
+        if self.should_send_default_pii() and isolation_scope._user is not None:
             for metric_attribute, user_attribute in (
                 ("user.id", "id"),
                 ("user.name", "username"),
diff --git a/tests/test_logs.py b/tests/test_logs.py
index 15baa9328b..f5e42e8b85 100644
--- a/tests/test_logs.py
+++ b/tests/test_logs.py
@@ -359,8 +359,8 @@ def test_auto_flush_logs_after_100(sentry_init, capture_envelopes):
 
 
 def test_log_user_attributes(sentry_init, capture_envelopes):
-    """User attributes are sent if enable_logs is True."""
-    sentry_init(enable_logs=True)
+    """User attributes are sent if enable_logs is True and send_default_pii is True."""
+    sentry_init(enable_logs=True, send_default_pii=True)
 
     sentry_sdk.set_user({"id": "1", "email": "test@example.com", "username": "test"})
     envelopes = capture_envelopes()
@@ -381,6 +381,26 @@ def test_log_user_attributes(sentry_init, capture_envelopes):
     }
 
 
+def test_log_no_user_attributes_if_no_pii(sentry_init, capture_envelopes):
+    """User attributes are not if PII sending is off."""
+    sentry_init(enable_logs=True, send_default_pii=False)
+
+    sentry_sdk.set_user({"id": "1", "email": "test@example.com", "username": "test"})
+    envelopes = capture_envelopes()
+
+    python_logger = logging.Logger("test-logger")
+    python_logger.warning("Hello, world!")
+
+    get_client().flush()
+
+    logs = envelopes_to_logs(envelopes)
+    (log,) = logs
+
+    assert "user.id" not in log["attributes"]
+    assert "user.email" not in log["attributes"]
+    assert "user.name" not in log["attributes"]
+
+
 @minimum_python_37
 def test_auto_flush_logs_after_5s(sentry_init, capture_envelopes):
     """
diff --git a/tests/test_metrics.py b/tests/test_metrics.py
index 0a1736a537..450538d763 100644
--- a/tests/test_metrics.py
+++ b/tests/test_metrics.py
@@ -117,7 +117,7 @@ def test_metrics_with_attributes(sentry_init, capture_envelopes):
 
 
 def test_metrics_with_user(sentry_init, capture_envelopes):
-    sentry_init()
+    sentry_init(send_default_pii=True)
     envelopes = capture_envelopes()
 
     sentry_sdk.set_user(
@@ -135,6 +135,25 @@ def test_metrics_with_user(sentry_init, capture_envelopes):
     assert metrics[0]["attributes"]["user.name"] == "testuser"
 
 
+def test_metrics_no_user_if_pii_off(sentry_init, capture_envelopes):
+    sentry_init(send_default_pii=False)
+    envelopes = capture_envelopes()
+
+    sentry_sdk.set_user(
+        {"id": "user-123", "email": "test@example.com", "username": "testuser"}
+    )
+    sentry_sdk.metrics.count("test.user.counter", 1)
+
+    get_client().flush()
+
+    metrics = envelopes_to_metrics(envelopes)
+    assert len(metrics) == 1
+
+    assert "user.id" not in metrics[0]["attributes"]
+    assert "user.email" not in metrics[0]["attributes"]
+    assert "user.name" not in metrics[0]["attributes"]
+
+
 def test_metrics_with_span(sentry_init, capture_envelopes):
     sentry_init(traces_sample_rate=1.0)
     envelopes = capture_envelopes()