diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 9a3194b0e8..14e8ca5204 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -17,6 +17,10 @@ Unreleased
 ----------
 * nothing unreleased
 
+[4.27.0]
+---------
+* chore: Add index to the username field in the `Consent` model
+
 [4.26.1]
 ---------
 * feat: proxy login now redirects to LMS register page instead of login page
diff --git a/consent/migrations/0007_datasharingconsent_consent_add_username_index.py b/consent/migrations/0007_datasharingconsent_consent_add_username_index.py
new file mode 100644
index 0000000000..b20ca0172e
--- /dev/null
+++ b/consent/migrations/0007_datasharingconsent_consent_add_username_index.py
@@ -0,0 +1,17 @@
+# Generated by Django 4.2.15 on 2024-10-07 14:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('consent', '0006_alter_historicaldatasharingconsent_options'),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name='datasharingconsent',
+            index=models.Index(fields=['username'], name='consent_dat_usernam_fae23a_idx'),
+        ),
+    ]
diff --git a/consent/models.py b/consent/models.py
index abbbd2a72e..ea230da629 100644
--- a/consent/models.py
+++ b/consent/models.py
@@ -195,6 +195,9 @@ class Meta:
 
         abstract = True
         app_label = 'consent'
+        indexes = [
+            models.Index(fields=['username'])
+        ]
 
     enterprise_customer = models.ForeignKey(
         EnterpriseCustomer,
diff --git a/enterprise/__init__.py b/enterprise/__init__.py
index 842d82f811..b15308fbf4 100644
--- a/enterprise/__init__.py
+++ b/enterprise/__init__.py
@@ -2,4 +2,4 @@
 Your project description goes here.
 """
 
-__version__ = "4.26.1"
+__version__ = "4.27.0"