diff --git a/API.md b/API.md
index 7d7b6b44a..672aaaed0 100644
--- a/API.md
+++ b/API.md
@@ -8,8 +8,8 @@ iD supports several URL parameters. When constructing a URL to a standalone inst
 of iD (e.g. `http://openstreetmap.us/iD/release/`), the following parameters are available
 in the hash portion of the URL:
 
-* `map` - A slash separated `zoom/longitude/latitude`.  Example:
-  `map=20.00/-77.02271/38.90085`
+* `map` - A slash separated `zoom/latitude/longitude`.  Example:
+  `map=20.00/38.90085/-77.02271`
 * `id` - The character 'n', 'w', or 'r', followed by the OSM ID of a node,
    way or relation, respectively. Selects the specified entity, and, unless
    a `map` parameter is also provided, centers the map on it.
@@ -35,8 +35,7 @@ When constructing a URL to an instance of iD embedded in the OpenStreetMap Rails
 Port (e.g. `http://www.openstreetmap.org/edit?editor=id`), the following parameters
 are available as regular URL query parameters:
 
-* `map` - slash separated `zoom/latitude/longitude`.  Example:
-  `map=20.00/38.90085/-77.02271`.
+* `map` - same as standalone
 * `lat`, `lon`, `zoom` - Self-explanatory.
 * `node`, `way`, `relation` - Select the specified entity.
 * `background` - same as standalone
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5106cd2cf..6db9e804a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 * :warning: iD now uses `npm` scripts for all build processes
   * iD requires Node v4 or higher, but does not require `make` anymore
   * Update install instructions and prerequisites (#3466, thanks @tyrasd)
+* :warning: iD url hash map order has changed to `zoom/latitude/longitude` to match OSM and others (#3554)
 * Many preset improvements:
   * Add Construction and Tower Type fields to Mast and Tower presets (#3561, thanks @bkil)
   * Add Turning Loop (Island) preset, adjust icons for traversable/nontraversable features (#3557)
diff --git a/modules/behavior/hash.js b/modules/behavior/hash.js
index 1cdeb9b15..6849aa6c3 100644
--- a/modules/behavior/hash.js
+++ b/modules/behavior/hash.js
@@ -14,8 +14,8 @@ export function behaviorHash(context) {
         if (args.length < 3 || args.some(isNaN)) {
             return true; // replace bogus hash
         } else if (s !== formatter(map).slice(1)) {
-            map.centerZoom([args[1],
-                Math.min(lat, Math.max(-lat, args[2]))], args[0]);
+            map.centerZoom([args[2],
+                Math.min(lat, Math.max(-lat, args[1]))], args[0]);
         }
     };
 
@@ -40,8 +40,8 @@ export function behaviorHash(context) {
         }
 
         newParams.map = zoom.toFixed(2) +
-                '/' + center[0].toFixed(precision) +
-                '/' + center[1].toFixed(precision);
+                '/' + center[1].toFixed(precision) +
+                '/' + center[0].toFixed(precision);
 
         return '#' + utilQsString(_.assign(q, newParams), true);
     };
diff --git a/test/spec/behavior/hash.js b/test/spec/behavior/hash.js
index 66f2159d3..15c86e963 100644
--- a/test/spec/behavior/hash.js
+++ b/test/spec/behavior/hash.js
@@ -4,15 +4,13 @@ describe('iD.behaviorHash', function () {
     var hash, context;
 
     beforeEach(function () {
-        context = iD.Context(window)
-            .imagery(iD.dataImagery);
+        context = iD.Context(window);
         context.container(d3.select(document.createElement('div')));
 
         // Neuter connection
         context.connection().loadTiles = function () {};
 
         hash = iD.behaviorHash(context);
-
         d3.select(document.createElement('div'))
             .call(context.map());
     });
@@ -22,18 +20,14 @@ describe('iD.behaviorHash', function () {
     });
 
     it('sets hadHash if location.hash is present', function () {
-        location.hash = 'map=20.00/-77.02405/38.87952';
-
+        location.hash = 'map=20.00/38.87952/-77.02405';
         hash();
-
         expect(hash.hadHash).to.be.true;
     });
 
     it('centerZooms map to requested level', function () {
-        location.hash = 'map=20.00/-77.02405/38.87952';
-
+        location.hash = 'map=20.00/38.87952/-77.02405';
         hash();
-
         expect(context.map().center()[0]).to.be.closeTo(-77.02405, 0.1);
         expect(context.map().center()[1]).to.be.closeTo(38.87952, 0.1);
         expect(context.map().zoom()).to.equal(20.0);
@@ -41,7 +35,6 @@ describe('iD.behaviorHash', function () {
 
     it('centerZooms map at requested coordinates on hash change', function (done) {
         hash();
-
         d3.select(window).on('hashchange', function () {
             expect(context.map().center()[0]).to.be.closeTo(-77.02405, 0.1);
             expect(context.map().center()[1]).to.be.closeTo(38.87952, 0.1);
@@ -49,24 +42,17 @@ describe('iD.behaviorHash', function () {
             d3.select(window).on('hashchange', null);
             done();
         });
-
-        location.hash = 'map=20.00/-77.02405/38.87952';
+        location.hash = 'map=20.00/38.87952/-77.02405';
     });
 
     it('stores the current zoom and coordinates in location.hash on map move events', function () {
         location.hash = '';
-
         hash();
-
         var clock = sinon.useFakeTimers();
-
-        context.map().center([38.9, -77.0]);
+        context.map().center([-77.0, 38.9]);
         context.map().zoom(2.0);
-
         clock.tick(500);
-
         expect(location.hash).to.equal('#map=2.00/38.9/-77.0');
-
         clock.restore();
     });
 });