diff --git a/github/enterprise_app_installation.go b/github/enterprise_app_installation.go
new file mode 100644
index 00000000000..aed3ac753fd
--- /dev/null
+++ b/github/enterprise_app_installation.go
@@ -0,0 +1,159 @@
+// Copyright 2025 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"context"
+	"fmt"
+)
+
+// InstallableOrganization represents an organization in an enterprise in which a GitHub app can be installed.
+type InstallableOrganization struct {
+	ID                        int64   `json:"id"`
+	Login                     string  `json:"login"`
+	AccessibleRepositoriesURL *string `json:"accessible_repositories_url,omitempty"`
+}
+
+// AccessibleRepository represents a repository that can be made accessible to a GitHub app.
+type AccessibleRepository struct {
+	ID       int64  `json:"id"`
+	Name     string `json:"name"`
+	FullName string `json:"full_name"`
+}
+
+// InstallAppRequest represents the request to install a GitHub app on an enterprise-owned organization.
+type InstallAppRequest struct {
+	// The Client ID of the GitHub App to install.
+	ClientID string `json:"client_id"`
+	// The selection of repositories that the GitHub app can access.
+	// Can be one of: all, selected, none
+	RepositorySelection string `json:"repository_selection"`
+	// A list of repository names that the GitHub App can access, if the repository_selection is set to selected.
+	Repositories []string `json:"repositories,omitempty"`
+}
+
+// ListAppInstallableOrganizations lists the organizations in an enterprise that are installable for an app.
+//
+// GitHub API docs: https://docs.github.com/enterprise-cloud@latest/rest/enterprise-admin/organization-installations#get-enterprise-owned-organizations-that-can-have-github-apps-installed
+//
+//meta:operation GET /enterprises/{enterprise}/apps/installable_organizations
+func (s *EnterpriseService) ListAppInstallableOrganizations(ctx context.Context, enterprise string, opts *ListOptions) ([]*InstallableOrganization, *Response, error) {
+	u := fmt.Sprintf("enterprises/%v/apps/installable_organizations", enterprise)
+
+	u, err := addOptions(u, opts)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var orgs []*InstallableOrganization
+	resp, err := s.client.Do(ctx, req, &orgs)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return orgs, resp, nil
+}
+
+// ListAppAccessibleOrganizationRepositories lists the repositories accessible to an app in an enterprise-owned organization.
+//
+// GitHub API docs: https://docs.github.com/enterprise-cloud@latest/rest/enterprise-admin/organization-installations#get-repositories-belonging-to-an-enterprise-owned-organization
+//
+//meta:operation GET /enterprises/{enterprise}/apps/installable_organizations/{org}/accessible_repositories
+func (s *EnterpriseService) ListAppAccessibleOrganizationRepositories(ctx context.Context, enterprise, org string, opts *ListOptions) ([]*AccessibleRepository, *Response, error) {
+	u := fmt.Sprintf("enterprises/%v/apps/installable_organizations/%v/accessible_repositories", enterprise, org)
+
+	u, err := addOptions(u, opts)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var repos []*AccessibleRepository
+	resp, err := s.client.Do(ctx, req, &repos)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return repos, resp, nil
+}
+
+// ListAppInstallations lists the GitHub app installations associated with the given enterprise-owned organization.
+//
+// GitHub API docs: https://docs.github.com/enterprise-cloud@latest/rest/enterprise-admin/organization-installations#list-github-apps-installed-on-an-enterprise-owned-organization
+//
+//meta:operation GET /enterprises/{enterprise}/apps/organizations/{org}/installations
+func (s *EnterpriseService) ListAppInstallations(ctx context.Context, enterprise, org string, opts *ListOptions) ([]*Installation, *Response, error) {
+	u := fmt.Sprintf("enterprises/%v/apps/organizations/%v/installations", enterprise, org)
+
+	u, err := addOptions(u, opts)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var installation []*Installation
+	resp, err := s.client.Do(ctx, req, &installation)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return installation, resp, nil
+}
+
+// InstallApp installs any valid GitHub app on the specified organization owned by the enterprise.
+// If the app is already installed on the organization, and is suspended, it will be unsuspended. If the app has a pending installation request, they will all be approved.
+//
+// GitHub API docs: https://docs.github.com/enterprise-cloud@latest/rest/enterprise-admin/organization-installations#install-a-github-app-on-an-enterprise-owned-organization
+//
+//meta:operation POST /enterprises/{enterprise}/apps/organizations/{org}/installations
+func (s *EnterpriseService) InstallApp(ctx context.Context, enterprise, org string, request InstallAppRequest) (*Installation, *Response, error) {
+	u := fmt.Sprintf("enterprises/%v/apps/organizations/%v/installations", enterprise, org)
+	req, err := s.client.NewRequest("POST", u, request)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var installation *Installation
+	resp, err := s.client.Do(ctx, req, &installation)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return installation, resp, nil
+}
+
+// UninstallApp uninstalls a GitHub app from an organization. Any app installed on the organization can be removed.
+//
+// GitHub API docs: https://docs.github.com/enterprise-cloud@latest/rest/enterprise-admin/organization-installations#uninstall-a-github-app-from-an-enterprise-owned-organization
+//
+//meta:operation DELETE /enterprises/{enterprise}/apps/organizations/{org}/installations/{installation_id}
+func (s *EnterpriseService) UninstallApp(ctx context.Context, enterprise, org string, installationID int64) (*Response, error) {
+	u := fmt.Sprintf("enterprises/%v/apps/organizations/%v/installations/%v", enterprise, org, installationID)
+	req, err := s.client.NewRequest("DELETE", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := s.client.Do(ctx, req, nil)
+	if err != nil {
+		return resp, err
+	}
+
+	return resp, nil
+}
diff --git a/github/enterprise_app_installation_test.go b/github/enterprise_app_installation_test.go
new file mode 100644
index 00000000000..766982a28d4
--- /dev/null
+++ b/github/enterprise_app_installation_test.go
@@ -0,0 +1,197 @@
+// Copyright 2025 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestEnterpriseService_ListAppInstallableOrganizations(t *testing.T) {
+	t.Parallel()
+	client, mux, _ := setup(t)
+
+	mux.HandleFunc("/enterprises/e/apps/installable_organizations", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		fmt.Fprint(w, `[{"id":1, "login":"org1"}]`)
+	})
+
+	ctx := t.Context()
+	opts := &ListOptions{Page: 1, PerPage: 10}
+	got, _, err := client.Enterprise.ListAppInstallableOrganizations(ctx, "e", opts)
+	if err != nil {
+		t.Fatalf("Enterprise.ListAppInstallableOrganizations returned error: %v", err)
+	}
+
+	want := []*InstallableOrganization{
+		{ID: int64(1), Login: "org1"},
+	}
+
+	if !cmp.Equal(got, want) {
+		t.Errorf("Enterprise.ListAppInstallableOrganizations = %+v, want %+v", got, want)
+	}
+
+	const methodName = "ListAppInstallableOrganizations"
+	testBadOptions(t, methodName, func() error {
+		_, _, err := client.Enterprise.ListAppInstallableOrganizations(ctx, "\n", opts)
+		return err
+	})
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Enterprise.ListAppInstallableOrganizations(ctx, "e", nil)
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}
+
+func TestEnterpriseService_ListAppAccessibleOrganizationRepositories(t *testing.T) {
+	t.Parallel()
+	client, mux, _ := setup(t)
+
+	mux.HandleFunc("/enterprises/e/apps/installable_organizations/org1/accessible_repositories", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		fmt.Fprint(w, `[{"id":10, "name":"repo1", "full_name":"org1/repo1"}]`)
+	})
+
+	opts := &ListOptions{Page: 2, PerPage: 2}
+	ctx := t.Context()
+	repos, _, err := client.Enterprise.ListAppAccessibleOrganizationRepositories(ctx, "e", "org1", opts)
+	if err != nil {
+		t.Errorf("Enterprise.ListAppAccessibleOrganizationRepositories returned error: %v", err)
+	}
+
+	want := []*AccessibleRepository{
+		{ID: int64(10), Name: "repo1", FullName: "org1/repo1"},
+	}
+
+	if !cmp.Equal(repos, want) {
+		t.Errorf("Enterprise.ListAppAccessibleOrganizationRepositories returned %+v, want %+v", repos, want)
+	}
+
+	const methodName = "ListAppAccessibleOrganizationRepositories"
+
+	testBadOptions(t, methodName, func() (err error) {
+		_, _, err = client.Enterprise.ListAppAccessibleOrganizationRepositories(ctx, "\n", "org1", opts)
+		return err
+	})
+
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Enterprise.ListAppAccessibleOrganizationRepositories(ctx, "e", "org1", nil)
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}
+
+func TestEnterpriseService_ListAppInstallations(t *testing.T) {
+	t.Parallel()
+	client, mux, _ := setup(t)
+
+	mux.HandleFunc("/enterprises/e/apps/organizations/org1/installations", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		testFormValues(t, r, values{"per_page": "2", "page": "2"})
+		fmt.Fprint(w, `[{"id":99}]`)
+	})
+
+	opts := &ListOptions{Page: 2, PerPage: 2}
+	ctx := t.Context()
+	installations, _, err := client.Enterprise.ListAppInstallations(ctx, "e", "org1", opts)
+	if err != nil {
+		t.Errorf("ListAppInstallations returned error: %v", err)
+	}
+	want := []*Installation{
+		{ID: Ptr(int64(99))},
+	}
+
+	if !cmp.Equal(installations, want) {
+		t.Errorf("ListAppInstallations returned %+v, want %+v", installations, want)
+	}
+
+	const methodName = "ListAppInstallations"
+
+	testBadOptions(t, methodName, func() (err error) {
+		_, _, err = client.Enterprise.ListAppInstallations(ctx, "\n", "org1", &ListOptions{})
+		return err
+	})
+
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Enterprise.ListAppInstallations(ctx, "e", "org1", nil)
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}
+
+func TestEnterpriseService_InstallApp(t *testing.T) {
+	t.Parallel()
+	client, mux, _ := setup(t)
+
+	mux.HandleFunc("/enterprises/e/apps/organizations/org1/installations", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "POST")
+		testBody(t, r, `{"client_id":"cid","repository_selection":"selected","repositories":["r1","r2"]}`+"\n")
+		fmt.Fprint(w, `{"id":555}`)
+	})
+
+	req := InstallAppRequest{
+		ClientID:            "cid",
+		RepositorySelection: "selected",
+		Repositories:        []string{"r1", "r2"},
+	}
+
+	ctx := t.Context()
+	installation, _, err := client.Enterprise.InstallApp(ctx, "e", "org1", req)
+	if err != nil {
+		t.Errorf("InstallApp returned error: %v", err)
+	}
+
+	want := &Installation{ID: Ptr(int64(555))}
+
+	if !cmp.Equal(installation, want) {
+		t.Errorf("InstallApp returned %+v, want %+v", installation, want)
+	}
+
+	const methodName = "InstallApp"
+
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Enterprise.InstallApp(ctx, "e", "org1", req)
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}
+
+func TestEnterpriseService_UninstallApp(t *testing.T) {
+	t.Parallel()
+	client, mux, _ := setup(t)
+
+	mux.HandleFunc("/enterprises/e/apps/organizations/org1/installations/123", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "DELETE")
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	ctx := t.Context()
+	resp, err := client.Enterprise.UninstallApp(ctx, "e", "org1", 123)
+	if err != nil {
+		t.Errorf("UninstallApp returned error: %v", err)
+	}
+
+	if resp.StatusCode != http.StatusNoContent {
+		t.Errorf("UninstallApp returned status %v, want %v", resp.StatusCode, http.StatusNoContent)
+	}
+
+	const methodName = "UninstallApp"
+
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		return client.Enterprise.UninstallApp(ctx, "e", "org1", 123)
+	})
+}
diff --git a/github/github-accessors.go b/github/github-accessors.go
index 2a1a9394f67..d9ed060d5ce 100644
--- a/github/github-accessors.go
+++ b/github/github-accessors.go
@@ -11286,6 +11286,14 @@ func (i *Import) GetVCSUsername() string {
 	return *i.VCSUsername
 }
 
+// GetAccessibleRepositoriesURL returns the AccessibleRepositoriesURL field if it's non-nil, zero value otherwise.
+func (i *InstallableOrganization) GetAccessibleRepositoriesURL() string {
+	if i == nil || i.AccessibleRepositoriesURL == nil {
+		return ""
+	}
+	return *i.AccessibleRepositoriesURL
+}
+
 // GetAccessTokensURL returns the AccessTokensURL field if it's non-nil, zero value otherwise.
 func (i *Installation) GetAccessTokensURL() string {
 	if i == nil || i.AccessTokensURL == nil {
diff --git a/github/github-accessors_test.go b/github/github-accessors_test.go
index c926697944f..d2ae9e7b911 100644
--- a/github/github-accessors_test.go
+++ b/github/github-accessors_test.go
@@ -14662,6 +14662,17 @@ func TestImport_GetVCSUsername(tt *testing.T) {
 	i.GetVCSUsername()
 }
 
+func TestInstallableOrganization_GetAccessibleRepositoriesURL(tt *testing.T) {
+	tt.Parallel()
+	var zeroValue string
+	i := &InstallableOrganization{AccessibleRepositoriesURL: &zeroValue}
+	i.GetAccessibleRepositoriesURL()
+	i = &InstallableOrganization{}
+	i.GetAccessibleRepositoriesURL()
+	i = nil
+	i.GetAccessibleRepositoriesURL()
+}
+
 func TestInstallation_GetAccessTokensURL(tt *testing.T) {
 	tt.Parallel()
 	var zeroValue string