diff --git a/app/controllers/api/v0/competitions_controller.rb b/app/controllers/api/v0/competitions_controller.rb
index d16540777a..4fa21ad8da 100644
--- a/app/controllers/api/v0/competitions_controller.rb
+++ b/app/controllers/api/v0/competitions_controller.rb
@@ -25,7 +25,7 @@ def competition_index
 
     competitions = competitions_scope.search(params[:q], params: params)
 
-    serial_methods = ["short_display_name", "city", "country_iso2", "event_ids", "date_range", "latitude_degrees", "longitude_degrees", "registration_status"]
+    serial_methods = ["short_display_name", "city", "country_iso2", "event_ids", "date_range", "latitude_degrees", "longitude_degrees", "cached_registration_status"]
     serial_includes = {}
 
     serial_includes["delegates"] = { only: ["id", "name"], methods: [], include: ["avatar"] } if admin_mode
diff --git a/app/models/competition.rb b/app/models/competition.rb
index 358ad74b69..1e95a247ea 100644
--- a/app/models/competition.rb
+++ b/app/models/competition.rb
@@ -1008,6 +1008,12 @@ def registration_status
     end
   end
 
+  def cached_registration_status
+    Rails.cache.fetch(["comp-registration-status", self.id], expires_in: 5.minutes) do
+      self.registration_status
+    end
+  end
+
   def any_registrations?
     self.registrations.any?
   end
diff --git a/app/webpacker/components/CompetitionsOverview/ListViewSection.js b/app/webpacker/components/CompetitionsOverview/ListViewSection.js
index 3f76a5d9b6..b375bf6090 100644
--- a/app/webpacker/components/CompetitionsOverview/ListViewSection.js
+++ b/app/webpacker/components/CompetitionsOverview/ListViewSection.js
@@ -408,7 +408,7 @@ function ConditionalYearHeader({
 }
 
 function RegistrationStatus({ comp }) {
-  if (comp.registration_status === 'not_yet_opened') {
+  if (comp.cached_registration_status === 'not_yet_opened') {
     return (
       <Popup
         trigger={<Icon name="clock" color="blue" />}
@@ -418,7 +418,7 @@ function RegistrationStatus({ comp }) {
       />
     );
   }
-  if (comp.registration_status === 'past') {
+  if (comp.cached_registration_status === 'past') {
     return (
       <Popup
         trigger={<Icon name="user times" color="red" />}
@@ -428,7 +428,7 @@ function RegistrationStatus({ comp }) {
       />
     );
   }
-  if (comp.registration_status === 'full') {
+  if (comp.cached_registration_status === 'full') {
     return (
       <Popup
         trigger={<Icon name="user clock" color="orange" />}
@@ -438,7 +438,7 @@ function RegistrationStatus({ comp }) {
       />
     );
   }
-  if (comp.registration_status === 'open') {
+  if (comp.cached_registration_status === 'open') {
     return (
       <Popup
         trigger={<Icon name="user plus" color="green" />}