diff --git a/atst/forms/task_order.py b/atst/forms/task_order.py
index 7d1c2167..7b5f42e4 100644
--- a/atst/forms/task_order.py
+++ b/atst/forms/task_order.py
@@ -31,7 +31,14 @@ class AppInfoForm(CacheableForm):
     portfolio_name = StringField(
         translate("forms.task_order.portfolio_name_label"),
         description=translate("forms.task_order.portfolio_name_description"),
-        validators=[Required()],
+        validators=[
+            Required(),
+            Length(
+                min=4,
+                max=100,
+                message=translate("forms.portfolio.name_length_validation_message"),
+            ),
+        ],
     )
     scope = TextAreaField(
         translate("forms.task_order.scope_label"),
diff --git a/js/lib/input_validations.js b/js/lib/input_validations.js
index c8b0c897..5016f192 100644
--- a/js/lib/input_validations.js
+++ b/js/lib/input_validations.js
@@ -122,6 +122,6 @@ export default {
     match: /^.{4,100}$/,
     unmask: [],
     validationError:
-      'Portfolio and request names must be at least 4 and not more than 100 characters',
+      'Portfolio names must be at least 4 and not more than 100 characters',
   },
 }
diff --git a/templates/task_orders/new/app_info.html b/templates/task_orders/new/app_info.html
index 85b52a6c..a5cd23d7 100644
--- a/templates/task_orders/new/app_info.html
+++ b/templates/task_orders/new/app_info.html
@@ -13,7 +13,7 @@
 
 <!-- App Info Section -->
 <h3 class="task-order-form__heading subheading">{{ "task_orders.new.app_info.basic_info_title"| translate }}</h3>
-{{ TextInput(form.portfolio_name, placeholder="The name of your office or organization") }}
+{{ TextInput(form.portfolio_name, placeholder="The name of your office or organization", validation="portfolioName") }}
 {{ TextInput(form.scope, paragraph=True) }}
 <p><i>{{ "task_orders.new.app_info.sample_scope" | translate | safe }}</i></p>
 <div class="subheading--black">
diff --git a/translations.yaml b/translations.yaml
index 48579fcb..46df4898 100644
--- a/translations.yaml
+++ b/translations.yaml
@@ -254,7 +254,7 @@ forms:
     is_required: This field is required.
   portfolio:
     name_label: Portfolio Name
-    name_length_validation_message: Portfolio names must be at least 4 and not more than 50 characters
+    name_length_validation_message: Portfolio names must be at least 4 and not more than 100 characters
 fragments:
   edit_application_form:
     existing_application_title: 'Edit {application_name} application'