diff --git a/data/us-states.json b/data/us-states.json
index 0d0c069..b9a5223 100644
--- a/data/us-states.json
+++ b/data/us-states.json
@@ -2031,7 +2031,7 @@
     },
     {
       "type": "Feature",
-      "id": "IW",
+      "id": "IA",
       "properties": { "name": "Iowa", "density": 54.81 },
       "geometry": {
         "type": "Polygon",