diff --git a/src/traces/parcats/calc.js b/src/traces/parcats/calc.js
index 510f4eba655..51ef5e28bfa 100644
--- a/src/traces/parcats/calc.js
+++ b/src/traces/parcats/calc.js
@@ -16,6 +16,7 @@ var colorscaleCalc = require('../../components/colorscale/calc');
 var filterUnique = require('../../lib/filter_unique.js');
 var Drawing = require('../../components/drawing');
 var Lib = require('../../lib');
+var isNumeric = require('fast-isnumeric');
 
 /**
  * Create a wrapped ParcatsModel object from trace
@@ -40,9 +41,19 @@ module.exports = function calc(gd, trace) {
             // then add extra to the end in trace order
             categoryValues = dim.categoryarray;
         } else {
-            // Get all categories up front so we can order them
-            // Should we check for numbers as sort numerically?
-            categoryValues = filterUnique(dim.values).sort();
+            // Get all categories up front
+            categoryValues = filterUnique(dim.values);
+
+            // order them
+            var allNumeric = true;
+            for(var i = 0; i < categoryValues.length; i++) {
+                if(!isNumeric(categoryValues[i])) {
+                    allNumeric = false;
+                    break;
+                }
+            }
+            categoryValues.sort(allNumeric ? Lib.sorterAsc : undefined);
+
             if(dim.categoryorder === 'category descending') {
                 categoryValues = categoryValues.reverse();
             }
diff --git a/test/image/baselines/parcats_numeric_sort.png b/test/image/baselines/parcats_numeric_sort.png
new file mode 100644
index 00000000000..0701334d71c
Binary files /dev/null and b/test/image/baselines/parcats_numeric_sort.png differ
diff --git a/test/image/mocks/parcats_numeric_sort.json b/test/image/mocks/parcats_numeric_sort.json
new file mode 100644
index 00000000000..01c4593a86e
--- /dev/null
+++ b/test/image/mocks/parcats_numeric_sort.json
@@ -0,0 +1,40 @@
+{
+    "data": [
+        {
+            "type": "parcats",
+            "dimensions": [
+                {
+                    "label": "A",
+                    "values": [
+                        1,
+                        2,
+                        3
+                    ],
+                    "categoryorder": "category ascending"
+                },
+                {
+                    "label": "B",
+                    "values": [
+                        9,
+                        10,
+                        11
+                    ],
+                    "categoryorder": "category ascending"
+                }
+            ]
+        }
+    ],
+    "layout": {
+        "width": 320,
+        "height": 200,
+        "margin": {
+            "t": 20,
+            "b": 20,
+            "l": 20,
+            "r": 20
+        },
+        "font": {
+            "size": 16
+        }
+    }
+}
diff --git a/test/jasmine/tests/mock_test.js b/test/jasmine/tests/mock_test.js
index 22e54a4a04c..eb7abbbfa29 100644
--- a/test/jasmine/tests/mock_test.js
+++ b/test/jasmine/tests/mock_test.js
@@ -743,6 +743,7 @@ var list = [
     'parcats_hoveron_color',
     'parcats_hoveron_dimension',
     'parcats_invisible_dimension',
+    'parcats_numeric_sort',
     'parcats_reordered',
     'parcats_unbundled',
     'percent_error_bar',
@@ -1785,6 +1786,7 @@ figs['parcats_grid_subplots'] = require('@mocks/parcats_grid_subplots');
 figs['parcats_hoveron_color'] = require('@mocks/parcats_hoveron_color');
 figs['parcats_hoveron_dimension'] = require('@mocks/parcats_hoveron_dimension');
 figs['parcats_invisible_dimension'] = require('@mocks/parcats_invisible_dimension');
+figs['parcats_numeric_sort'] = require('@mocks/parcats_numeric_sort');
 figs['parcats_reordered'] = require('@mocks/parcats_reordered');
 figs['parcats_unbundled'] = require('@mocks/parcats_unbundled');
 figs['percent_error_bar'] = require('@mocks/percent_error_bar');