diff --git a/changelogs/fragments/61227-win_iis_webapplication-apppool-change.yml b/changelogs/fragments/61227-win_iis_webapplication-apppool-change.yml
new file mode 100644
index 00000000000..f500d99b788
--- /dev/null
+++ b/changelogs/fragments/61227-win_iis_webapplication-apppool-change.yml
@@ -0,0 +1,2 @@
+minor_changes:
+- win_iis_webapplication - now uses the current application pool of the website instead of the DefaultAppPool if none was specified.
diff --git a/lib/ansible/modules/windows/win_iis_webapplication.ps1 b/lib/ansible/modules/windows/win_iis_webapplication.ps1
index 5658ae73de8..587de19cb69 100644
--- a/lib/ansible/modules/windows/win_iis_webapplication.ps1
+++ b/lib/ansible/modules/windows/win_iis_webapplication.ps1
@@ -27,6 +27,12 @@ if ($null -eq (Get-Module "WebAdministration" -ErrorAction SilentlyContinue)) {
 
 # Application info
 $application = Get-WebApplication -Site $site -Name $name
+$website = Get-Website -Name $site
+
+# Set ApplicationPool to current if not specified
+if (!$application_pool) {
+  $application_pool = $website.applicationPool
+}
 
 try {
   # Add application
diff --git a/lib/ansible/modules/windows/win_iis_webapplication.py b/lib/ansible/modules/windows/win_iis_webapplication.py
index 2ddc32b4ab5..3e293d989b2 100644
--- a/lib/ansible/modules/windows/win_iis_webapplication.py
+++ b/lib/ansible/modules/windows/win_iis_webapplication.py
@@ -40,6 +40,7 @@ options:
   application_pool:
     description:
     - The application pool in which the new site executes.
+    - If not specified, the application pool of the current website will be used.
     type: str
 seealso:
 - module: win_iis_virtualdirectory