diff --git a/html/modules/custom/ghi_blocks/src/Plugin/Block/GlobalPage/KeyFigures.php b/html/modules/custom/ghi_blocks/src/Plugin/Block/GlobalPage/KeyFigures.php
index 2b20c24a6..c832741a4 100644
--- a/html/modules/custom/ghi_blocks/src/Plugin/Block/GlobalPage/KeyFigures.php
+++ b/html/modules/custom/ghi_blocks/src/Plugin/Block/GlobalPage/KeyFigures.php
@@ -63,6 +63,7 @@ public function getData(string $source_key = 'data') {
       'expectedReach' => 'Expected reach',
     ];
     $caseload_values = $this->getPlanQuery()->getCaseloadTotalValues($types);
+    $affected_countries = $this->getPlanQuery()->getNumerOfGhoCountries();
     return [
       'total_funding' => $funding,
       'total_requirements' => $requirements,
@@ -72,6 +73,7 @@ public function getData(string $source_key = 'data') {
       'people_reached' => $caseload_values['reached'],
       'people_reached_percent' => CommonHelper::calculateRatio($caseload_values['reached_custom'], $caseload_values['target_custom']),
       'people_expected_reach' => $caseload_values['expectedReach'],
+      'countries_affected' => $affected_countries,
     ];
   }
 
diff --git a/html/modules/custom/ghi_plans/src/Plugin/EndpointQuery/PlanOverviewQuery.php b/html/modules/custom/ghi_plans/src/Plugin/EndpointQuery/PlanOverviewQuery.php
index 204aa3d83..f5c64ab8a 100644
--- a/html/modules/custom/ghi_plans/src/Plugin/EndpointQuery/PlanOverviewQuery.php
+++ b/html/modules/custom/ghi_plans/src/Plugin/EndpointQuery/PlanOverviewQuery.php
@@ -100,6 +100,44 @@ public function getPlans($filter = TRUE) {
     return $this->plans;
   }
 
+  /**
+   * Get the caseload total values for the supplied types.
+   *
+   * @return int
+   *   The number of unique countries of all GHO plans.
+   */
+  public function getNumerOfGhoCountries() {
+    // Get the plans, but make sure they are not filtered for visibility. The
+    // number of affected countries will appear only in the key figures
+    // element, where we want the number of countries for all GHO plans
+    // independently of whether specific plans are hidden from global pages or
+    // not.
+    $plans = $this->getPlans(FALSE);
+    if (empty($plans)) {
+      return 0;
+    }
+
+    $countries = [];
+    foreach ($plans as $plan) {
+      // Only include plans with isPartOfGho=true.
+      if (!$plan->isPartOfGho()) {
+        continue;
+      }
+      $plan_countries = $plan->getCountries();
+      if (empty($plan_countries)) {
+        continue;
+      }
+      foreach ($plan_countries as $plan_country) {
+        if (array_key_exists($plan_country->id(), $countries)) {
+          continue;
+        }
+        $countries[$plan_country->id()] = $plan_country;
+      }
+    }
+
+    return count($countries);
+  }
+
   /**
    * Get the caseload total values for the supplied types.
    *