diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32c7c446..b655db27 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ Unreleased
 - Added `**kwargs` to `AzureBlobFileSystem.exists()`
 - Populate `AzureBlobFile.version_id` on write when `version_aware` is enabled.
 - Fixed issue where unawaitable Credential types were incorrectly awaited (#431)
+- Fixed bug where `fs.ls(detail=True)` returned Etag formatted without double quotes.[#544](https://github.com/fsspec/adlfs/pull/544)
 
 2026.2.0
 --------
diff --git a/adlfs/spec.py b/adlfs/spec.py
index 0c0a8625..6d72da8c 100644
--- a/adlfs/spec.py
+++ b/adlfs/spec.py
@@ -156,6 +156,27 @@ def _create_aio_blob_service_client_from_connection_string(
     )
 
 
+def _strip_quotes_from_etag(etag: str) -> Optional[str]:
+    """
+    Normalizes blob etag values to always be returned wrapped with double quotes regardless
+    of the format gotten from the SDK.
+
+    Parameters
+    ----------
+    etag: str
+        Raw etag value from Azure
+
+    Returns
+    -------
+    str
+        Returns the normalized etag
+    """
+    if etag is None:
+        return None
+    double_quote = '"'
+    return f'"{etag.strip(double_quote)}"'
+
+
 class AzureBlobFileSystem(AsyncFileSystem):
     """
     Access Azure Datalake Gen2 and Azure Storage if it were a file system using Multiprotocol Access
@@ -897,6 +918,9 @@ async def _details(
                 for key in FORWARDED_BLOB_PROPERTIES
                 if content.has_key(key)  # NOQA
             }
+            # Return a string with double quotes for consistency
+            if data.get("etag") is not None:
+                data["etag"] = _strip_quotes_from_etag(data["etag"])
             if self.version_aware:
                 data.update(
                     (key, content[key])
diff --git a/adlfs/tests/test_spec.py b/adlfs/tests/test_spec.py
index e98f47fc..5cb734e1 100644
--- a/adlfs/tests/test_spec.py
+++ b/adlfs/tests/test_spec.py
@@ -20,6 +20,7 @@
 from pandas.testing import assert_frame_equal
 
 from adlfs import AzureBlobFile, AzureBlobFileSystem
+from adlfs.spec import _strip_quotes_from_etag
 from adlfs.tests.constants import (
     ACCOUNT_NAME,
     CONN_STR,
@@ -2571,3 +2572,41 @@ class TestCloseCredential:
     async def test_close_credential(self, credential):
         file_obj = SimpleNamespace(credential=credential)
         await close_credential(file_obj)
+
+
+def test_etag_normalized_form(storage):
+    """
+    Tests a consistent quoted etag format with ls() and info() calls.
+    """
+    fs = AzureBlobFileSystem(
+        account_name=storage.account_name,
+        connection_string=CONN_STR,
+    )
+    path = "data/root/a/file.txt"
+    # Get etag info from ls(detail = True) and info()
+    ls_results = fs.ls(path, detail=True, refresh=True)
+    ls_etag = [f["etag"] for f in ls_results if f["name"] == path][0]
+
+    info_etag = fs.info(path, refresh=True)["etag"]
+
+    assert info_etag == ls_etag
+    # Validate both etags are quoted
+    assert ls_etag.startswith('"') and info_etag.startswith('"')
+    assert ls_etag.endswith('"') and info_etag.endswith('"')
+    # Validate etag is not double quoted
+    assert not ls_etag.startswith('""') and not ls_etag.endswith('""')
+
+
+@pytest.mark.parametrize(
+    "input_etag,expected_etag",
+    [
+        pytest.param("0xA123456", '"0xA123456"', id="bug"),
+        pytest.param('"0xA123456"', '"0xA123456"', id="normal"),
+        pytest.param('""0xA123456""', '"0xA123456"', id="double-double-quotes"),
+        pytest.param('"0xA123456', '"0xA123456"', id="leading-double-quote"),
+        pytest.param('0xA123456"', '"0xA123456"', id="trailing-double-quote"),
+        pytest.param(None, None),
+    ],
+)
+def test_striping_etag(input_etag, expected_etag):
+    assert _strip_quotes_from_etag(input_etag) == expected_etag