diff --git a/app/services/seed/parks.rb b/app/services/seed/parks.rb
index d102180..d33dade 100644
--- a/app/services/seed/parks.rb
+++ b/app/services/seed/parks.rb
@@ -9,13 +9,18 @@ class Seed::Parks
       response_body = NpsClient.current.parks(offset: offset).body
       offset = response_body['start'].to_i + response_body['limit'].to_i
       total = response_body['total'].to_i
-      parks = response_body['data']
+      parks, states = response_body['data']
         .pluck('parkCode', 'name', 'states', 'activities', 'operatingHours')
         .map do |code, name, states, activities, operating_hours|
-          { code:, name:, properties: { activities:, operating_hours: } }
-        end
+          [
+            { code:, name:, properties: { activities:, operating_hours: } },
+            states.split(',').map { { state: it.strip.upcase, park_code: code } }
+          ]
+        end.transpose
       Park.upsert_all(parks, unique_by: :code)
+      ParksByState.upsert_all(states.flatten, unique_by: :index_parks_by_states_on_state_and_park_code)
       Rails.logger.info("Upserted #{parks.count} national parks")
+      Rails.logger.info("Upserted #{states.flatten.count} park by state records")
     end
   end
 end