diff --git a/src/registrar/admin.py b/src/registrar/admin.py
index bd5555805..d3f5b49f1 100644
--- a/src/registrar/admin.py
+++ b/src/registrar/admin.py
@@ -737,7 +737,18 @@ class DomainApplicationAdmin(ListHeaderAdmin):
     # Detail view
     form = DomainApplicationAdminForm
     fieldsets = [
-        (None, {"fields": ["status", "investigator", "creator", "approved_domain"]}),
+        (
+            None,
+            {
+                "fields": [
+                    "status", 
+                    "investigator", 
+                    "creator", 
+                    "approved_domain",
+                    "notes"
+                ]
+            }
+        ),
         (
             "Type of organization",
             {
@@ -991,6 +1002,22 @@ class DomainAdmin(ListHeaderAdmin):
         "deleted",
     ]
 
+    fieldsets = (
+        (
+            None,
+            {
+                "fields": [
+                    "name", 
+                    "state", 
+                    "expiration_date", 
+                    "first_ready", 
+                    "deleted", 
+                    "notes"
+                ]
+            },
+        ),
+    )
+
     # this ordering effects the ordering of results
     # in autocomplete_fields for domain
     ordering = ["name"]
diff --git a/src/registrar/migrations/0064_domain_notes_domainapplication_notes.py b/src/registrar/migrations/0064_domain_notes_domainapplication_notes.py
new file mode 100644
index 000000000..24dfaf4e3
--- /dev/null
+++ b/src/registrar/migrations/0064_domain_notes_domainapplication_notes.py
@@ -0,0 +1,22 @@
+# Generated by Django 4.2.7 on 2024-01-24 20:34
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("registrar", "0063_veryimportantperson"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="domain",
+            name="notes",
+            field=models.TextField(blank=True, help_text="Notes about this domain", null=True),
+        ),
+        migrations.AddField(
+            model_name="domainapplication",
+            name="notes",
+            field=models.TextField(blank=True, help_text="Notes about this application", null=True),
+        ),
+    ]
diff --git a/src/registrar/models/domain.py b/src/registrar/models/domain.py
index 1a581a4ec..f84e61a80 100644
--- a/src/registrar/models/domain.py
+++ b/src/registrar/models/domain.py
@@ -992,6 +992,12 @@ class Domain(TimeStampedModel, DomainHelper):
         help_text="The last time this domain moved into the READY state",
     )
 
+    notes = models.TextField(
+        null=True,
+        blank=True,
+        help_text="Notes about this domain",
+    )
+
     def isActive(self):
         return self.state == Domain.State.CREATED
 
diff --git a/src/registrar/models/domain_application.py b/src/registrar/models/domain_application.py
index 196449bfa..301d1b42b 100644
--- a/src/registrar/models/domain_application.py
+++ b/src/registrar/models/domain_application.py
@@ -556,6 +556,12 @@ class DomainApplication(TimeStampedModel):
         help_text="Date submitted",
     )
 
+    notes = models.TextField(
+        null=True,
+        blank=True,
+        help_text="Notes about this application",
+    )
+
     def __str__(self):
         try:
             if self.requested_domain and self.requested_domain.name:
diff --git a/src/registrar/models/domain_information.py b/src/registrar/models/domain_information.py
index bdff6061b..fa3b78e1a 100644
--- a/src/registrar/models/domain_information.py
+++ b/src/registrar/models/domain_information.py
@@ -223,13 +223,20 @@ class DomainInformation(TimeStampedModel):
         if domain_info:
             return domain_info
         # the following information below is not needed in the domain information:
-        da_dict.pop("status", None)
-        da_dict.pop("current_websites", None)
-        da_dict.pop("investigator", None)
-        da_dict.pop("alternative_domains", None)
-        da_dict.pop("requested_domain", None)
-        da_dict.pop("approved_domain", None)
-        da_dict.pop("submission_date", None)
+        unused_one_to_one_fields = [
+            "status",
+            "current_websites",
+            "investigator",
+            "alternative_domains",
+            "requested_domain",
+            "approved_domain",
+            "submission_date",
+            "other_contacts",
+            "notes",
+        ]
+        for field in unused_one_to_one_fields:
+            da_dict.pop(field, None)
+
         other_contacts = da_dict.pop("other_contacts", [])
         domain_info = cls(**da_dict)
         domain_info.domain_application = domain_application