diff --git a/src/registrar/forms/__init__.py b/src/registrar/forms/__init__.py
index a0c71d48c..374b3102f 100644
--- a/src/registrar/forms/__init__.py
+++ b/src/registrar/forms/__init__.py
@@ -10,3 +10,6 @@
     DomainDsdataFormset,
     DomainDsdataForm,
 )
+from .portfolio import (
+    PortfolioOrgAddressForm,
+)
diff --git a/src/registrar/forms/domain.py b/src/registrar/forms/domain.py
index 9b8f1b7fc..02a0724d1 100644
--- a/src/registrar/forms/domain.py
+++ b/src/registrar/forms/domain.py
@@ -458,7 +458,7 @@ class Meta:
     # the database fields have blank=True so ModelForm doesn't create
     # required fields by default. Use this list in __init__ to mark each
     # of these fields as required
-    required = ["organization_name", "address_line1", "city", "zipcode"]
+    required = ["organization_name", "address_line1", "city", "state_territory", "zipcode"]
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
diff --git a/src/registrar/forms/portfolio.py b/src/registrar/forms/portfolio.py
new file mode 100644
index 000000000..9362c7bbd
--- /dev/null
+++ b/src/registrar/forms/portfolio.py
@@ -0,0 +1,69 @@
+"""Forms for portfolio."""
+
+import logging
+from django import forms
+from django.core.validators import RegexValidator
+
+from ..models import DomainInformation, Portfolio
+
+logger = logging.getLogger(__name__)
+
+
+class PortfolioOrgAddressForm(forms.ModelForm):
+    """Form for updating the portfolio org mailing address."""
+
+    zipcode = forms.CharField(
+        label="Zip code",
+        validators=[
+            RegexValidator(
+                "^[0-9]{5}(?:-[0-9]{4})?$|^$",
+                message="Enter a zip code in the required format, like 12345 or 12345-6789.",
+            )
+        ],
+    )
+
+    class Meta:
+        model = Portfolio
+        fields = [
+            "address_line1",
+            "address_line2",
+            "city",
+            "state_territory",
+            "zipcode",
+            # "urbanization",
+        ]
+        error_messages = {
+            "address_line1": {"required": "Enter the street address of your organization."},
+            "city": {"required": "Enter the city where your organization is located."},
+            "state_territory": {
+                "required": "Select the state, territory, or military post where your organization is located."
+            },
+        }
+        widgets = {
+            # We need to set the required attributed for State/territory
+            # because for this fields we are creating an individual
+            # instance of the Select. For the other fields we use the for loop to set
+            # the class's required attribute to true.
+            "address_line1": forms.TextInput,
+            "address_line2": forms.TextInput,
+            "city": forms.TextInput,
+            "state_territory": forms.Select(
+                attrs={
+                    "required": True,
+                },
+                choices=DomainInformation.StateTerritoryChoices.choices,
+            ),
+            # "urbanization": forms.TextInput,
+        }
+
+    # the database fields have blank=True so ModelForm doesn't create
+    # required fields by default. Use this list in __init__ to mark each
+    # of these fields as required
+    required = ["address_line1", "city", "state_territory", "zipcode"]
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        for field_name in self.required:
+            self.fields[field_name].required = True
+        self.fields["state_territory"].widget.attrs.pop("maxlength", None)
+        self.fields["zipcode"].widget.attrs.pop("maxlength", None)
diff --git a/src/registrar/models/portfolio.py b/src/registrar/models/portfolio.py
index 7d0500e19..06b01e672 100644
--- a/src/registrar/models/portfolio.py
+++ b/src/registrar/models/portfolio.py
@@ -6,11 +6,6 @@
 from .utility.time_stamped_model import TimeStampedModel
 
 
-# def get_default_federal_agency():
-#     """returns non-federal agency"""
-#     return FederalAgency.objects.filter(agency="Non-Federal Agency").first()
-
-
 class Portfolio(TimeStampedModel):
     """
     Portfolio is used for organizing domains/domain-requests into
diff --git a/src/registrar/templates/portfolio_organization.html b/src/registrar/templates/portfolio_organization.html
index c7eae7130..0dede3c32 100644
--- a/src/registrar/templates/portfolio_organization.html
+++ b/src/registrar/templates/portfolio_organization.html
@@ -1,8 +1,64 @@
 {% extends 'portfolio_base.html' %}
+{% load static field_helpers%}
+
+{% block title %}Organization mailing address | {{ portfolio.name }} | {% endblock %}
 
 {% load static %}
 
 {% block portfolio_content %}
-    <h1>Organization</h1>
+<div class="grid-row grid-gap">
+    <div class="tablet:grid-col-3">
+        <p class="font-body-md margin-top-0 margin-bottom-2
+                    text-primary-darker text-semibold"
+        >
+            <span class="usa-sr-only"> Portfolio name:</span> {{ portfolio }}
+        </p>
+
+        {% include 'portfolio_organization_sidebar.html' %}
+    </div>
+
+    <div class="tablet:grid-col-9">
+
+        <h1>Organization</h1>
+
+        <p>The name of your federal agency will be publicly listed as the domain registrant.</p>
+
+        <p>
+            The federal agency for your organization can’t be updated here.
+            To suggest an update, email <a href="mailto:help@get.gov" class="usa-link">help@get.gov</a>.
+        </p>
+
+        {% include "includes/form_errors.html" with form=form %}
+
+        {% include "includes/required_fields.html" %}
+
+        <form class="usa-form usa-form--large" method="post" novalidate id="form-container">
+            {% csrf_token %}
+
+            <p>
+                <strong class="text-primary display-block margin-bottom-1">Federal agency</strong>
+                {{ portfolio }}
+            </p>
+
+            {% input_with_errors form.address_line1 %}
+
+            {% input_with_errors form.address_line2 %}
+
+            {% input_with_errors form.city %}
+
+            {% input_with_errors form.state_territory %}
+
+            {% with add_class="usa-input--small" %}
+            {% input_with_errors form.zipcode %}
+            {% endwith %}
 
+            <button
+            type="submit"
+            class="usa-button"
+            >
+            Save
+            </button>
+        </form>
+    </div>
+</div>
 {% endblock %}
diff --git a/src/registrar/templates/portfolio_organization_sidebar.html b/src/registrar/templates/portfolio_organization_sidebar.html
new file mode 100644
index 000000000..6199c2476
--- /dev/null
+++ b/src/registrar/templates/portfolio_organization_sidebar.html
@@ -0,0 +1,23 @@
+{% load static url_helpers %}
+
+<div class="margin-bottom-4 tablet:margin-bottom-0">
+  <nav aria-label="Domain sections">
+    <ul class="usa-sidenav">
+      <li class="usa-sidenav__item">
+        {% url 'portfolio-organization' portfolio_id=portfolio.id as url %} 
+        <a href="{{ url }}" 
+          {% if request.path == url %}class="usa-current"{% endif %}
+        >
+          Organization
+        </a>
+      </li>
+
+      <li class="usa-sidenav__item">
+        <a href="#"
+        >
+            Senior official
+        </a>
+      </li>
+    </ul>
+  </nav>
+</div>
diff --git a/src/registrar/tests/test_views_portfolio.py b/src/registrar/tests/test_views_portfolio.py
index 3ab2fc2fd..3596bf567 100644
--- a/src/registrar/tests/test_views_portfolio.py
+++ b/src/registrar/tests/test_views_portfolio.py
@@ -1,5 +1,6 @@
 from django.urls import reverse
 from api.tests.common import less_console_noise_decorator
+from registrar.config import settings
 from registrar.models.portfolio import Portfolio
 from django_webtest import WebTest  # type: ignore
 from registrar.models import (
@@ -17,7 +18,7 @@
 logger = logging.getLogger(__name__)
 
 
-class TestPortfolioViews(WebTest):
+class TestPortfolio(WebTest):
     def setUp(self):
         super().setUp()
         self.user = create_test_user()
@@ -192,3 +193,70 @@ def test_navigation_links_hidden_when_user_not_have_permission(self):
             self.assertNotContains(
                 portfolio_page, reverse("portfolio-domain-requests", kwargs={"portfolio_id": self.portfolio.pk})
             )
+
+
+class TestPortfolioOrganization(TestPortfolio):
+
+    def test_portfolio_org_name(self):
+        """Can load portfolio's org name page."""
+        with override_flag("organization_feature", active=True):
+            self.app.set_user(self.user.username)
+            self.user.portfolio = self.portfolio
+            self.user.portfolio_additional_permissions = [
+                User.UserPortfolioPermissionChoices.VIEW_PORTFOLIO,
+                User.UserPortfolioPermissionChoices.EDIT_PORTFOLIO,
+            ]
+            self.user.save()
+            self.user.refresh_from_db()
+
+            page = self.app.get(reverse("portfolio-organization", kwargs={"portfolio_id": self.portfolio.pk}))
+            self.assertContains(
+                page, "The name of your federal agency will be publicly listed as the domain registrant."
+            )
+
+    def test_domain_org_name_address_content(self):
+        """Org name and address information appears on the page."""
+        with override_flag("organization_feature", active=True):
+            self.app.set_user(self.user.username)
+            self.user.portfolio = self.portfolio
+            self.user.portfolio_additional_permissions = [
+                User.UserPortfolioPermissionChoices.VIEW_PORTFOLIO,
+                User.UserPortfolioPermissionChoices.EDIT_PORTFOLIO,
+            ]
+            self.user.save()
+            self.user.refresh_from_db()
+
+            self.portfolio.organization_name = "Hotel California"
+            self.portfolio.save()
+            page = self.app.get(reverse("portfolio-organization", kwargs={"portfolio_id": self.portfolio.pk}))
+            # Once in the sidenav, once in the main nav, once in the form
+            self.assertContains(page, "Hotel California", count=3)
+
+    def test_domain_org_name_address_form(self):
+        """Submitting changes works on the org name address page."""
+        with override_flag("organization_feature", active=True):
+            self.app.set_user(self.user.username)
+            self.user.portfolio = self.portfolio
+            self.user.portfolio_additional_permissions = [
+                User.UserPortfolioPermissionChoices.VIEW_PORTFOLIO,
+                User.UserPortfolioPermissionChoices.EDIT_PORTFOLIO,
+            ]
+            self.user.save()
+            self.user.refresh_from_db()
+
+            self.portfolio.address_line1 = "1600 Penn Ave"
+            self.portfolio.save()
+            portfolio_org_name_page = self.app.get(
+                reverse("portfolio-organization", kwargs={"portfolio_id": self.portfolio.pk})
+            )
+            session_id = self.app.cookies[settings.SESSION_COOKIE_NAME]
+
+            portfolio_org_name_page.form["address_line1"] = "6 Downing st"
+            portfolio_org_name_page.form["city"] = "London"
+
+            self.app.set_cookie(settings.SESSION_COOKIE_NAME, session_id)
+            success_result_page = portfolio_org_name_page.form.submit()
+            self.assertEqual(success_result_page.status_code, 200)
+
+            self.assertContains(success_result_page, "6 Downing st")
+            self.assertContains(success_result_page, "London")
diff --git a/src/registrar/views/portfolios.py b/src/registrar/views/portfolios.py
index f693e2cc9..abd9648ba 100644
--- a/src/registrar/views/portfolios.py
+++ b/src/registrar/views/portfolios.py
@@ -1,4 +1,8 @@
+import logging
 from django.shortcuts import get_object_or_404, render
+from django.urls import reverse
+from django.contrib import messages
+from registrar.forms.portfolio import PortfolioOrgAddressForm
 from registrar.models.portfolio import Portfolio
 from registrar.views.utility.permission_views import (
     PortfolioDomainRequestsPermissionView,
@@ -7,6 +11,10 @@
 )
 from waffle.decorators import flag_is_active
 from django.views.generic import View
+from django.views.generic.edit import FormMixin
+
+
+logger = logging.getLogger(__name__)
 
 
 class PortfolioDomainsView(PortfolioDomainsPermissionView, View):
@@ -42,17 +50,61 @@ def get(self, request, portfolio_id):
         return render(request, "portfolio_requests.html", context)
 
 
-class PortfolioOrganizationView(PortfolioBasePermissionView, View):
+class PortfolioOrganizationView(PortfolioBasePermissionView, FormMixin):
+    """
+    View to handle displaying and updating the portfolio's organization details.
+    """
 
+    model = Portfolio
     template_name = "portfolio_organization.html"
-
-    def get(self, request, portfolio_id):
-        context = {}
-
-        if self.request.user.is_authenticated:
-            context["has_profile_feature_flag"] = flag_is_active(request, "profile_feature")
-            context["has_organization_feature_flag"] = flag_is_active(request, "organization_feature")
-            portfolio = get_object_or_404(Portfolio, id=portfolio_id)
-            context["portfolio"] = portfolio
-
-        return render(request, "portfolio_organization.html", context)
+    form_class = PortfolioOrgAddressForm
+    context_object_name = "portfolio"
+
+    def get_context_data(self, **kwargs):
+        """Add additional context data to the template."""
+        context = super().get_context_data(**kwargs)
+        # no need to add portfolio to request context here
+        context["has_profile_feature_flag"] = flag_is_active(self.request, "profile_feature")
+        context["has_organization_feature_flag"] = flag_is_active(self.request, "organization_feature")
+        return context
+
+    def get_object(self, queryset=None):
+        """Get the portfolio object based on the URL parameter."""
+        return get_object_or_404(Portfolio, id=self.kwargs.get("portfolio_id"))
+
+    def get_form_kwargs(self):
+        """Include the instance in the form kwargs."""
+        kwargs = super().get_form_kwargs()
+        kwargs["instance"] = self.get_object()
+        return kwargs
+
+    def get(self, request, *args, **kwargs):
+        """Handle GET requests to display the form."""
+        self.object = self.get_object()
+        form = self.get_form()
+        return self.render_to_response(self.get_context_data(form=form))
+
+    def post(self, request, *args, **kwargs):
+        """Handle POST requests to process form submission."""
+        self.object = self.get_object()
+        form = self.get_form()
+        if form.is_valid():
+            return self.form_valid(form)
+        else:
+            return self.form_invalid(form)
+
+    def form_valid(self, form):
+        """Handle the case when the form is valid."""
+        self.object = form.save(commit=False)
+        self.object.creator = self.request.user
+        self.object.save()
+        messages.success(self.request, "The organization information for this portfolio has been updated.")
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        """Handle the case when the form is invalid."""
+        return self.render_to_response(self.get_context_data(form=form))
+
+    def get_success_url(self):
+        """Redirect to the overview page for the portfolio."""
+        return reverse("portfolio-organization", kwargs={"portfolio_id": self.object.pk})