diff --git a/.changelog/5438.changed b/.changelog/5438.changed
new file mode 100644
index 0000000000..42e90082e5
--- /dev/null
+++ b/.changelog/5438.changed
@@ -0,0 +1 @@
+`opentelemetry-sdk`: unify logging force_flush timeout defaults to 30000ms
diff --git a/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/__init__.py b/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/__init__.py
index a56cfc622a..d6ff7717ef 100644
--- a/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/__init__.py
+++ b/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/__init__.py
@@ -116,7 +116,7 @@ def shutdown(self):
         """
 
     @abc.abstractmethod
-    def force_flush(self, timeout_millis: int = 10_000) -> bool:
+    def force_flush(self, timeout_millis: int = 30000) -> bool:
         """Hint to ensure that the export of any ``ReadableLogRecord`` objects
         the exporter has received prior to the call to ``force_flush`` SHOULD be
         completed as soon as possible, preferably before returning from this method.
@@ -161,7 +161,7 @@ def export(self, batch: Sequence[ReadableLogRecord]):
     def shutdown(self):
         pass
 
-    def force_flush(self, timeout_millis: int = 10_000) -> bool:
+    def force_flush(self, timeout_millis: int = 30000) -> bool:
         return True
 
 
@@ -321,7 +321,7 @@ def on_emit(self, log_record: ReadWriteLogRecord) -> None:
     def shutdown(self):
         return self._batch_processor.shutdown()
 
-    def force_flush(self, timeout_millis: int | None = None) -> bool:
+    def force_flush(self, timeout_millis: int = 30000) -> bool:
         return self._batch_processor.force_flush(timeout_millis)
 
     @staticmethod
diff --git a/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/in_memory_log_exporter.py b/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/in_memory_log_exporter.py
index 97013f432d..d11a174c15 100644
--- a/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/in_memory_log_exporter.py
+++ b/opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/export/in_memory_log_exporter.py
@@ -44,7 +44,7 @@ def export(self, batch: collections.abc.Sequence[ReadableLogRecord]) -> LogRecor
     def shutdown(self) -> None:
         self._stopped = True
 
-    def force_flush(self, timeout_millis: int = 10_000) -> bool:
+    def force_flush(self, timeout_millis: int = 30000) -> bool:
         return True