diff --git a/README.rst b/README.rst
index 05a5b8e..fee51aa 100755
--- a/README.rst
+++ b/README.rst
@@ -231,6 +231,7 @@ Finance
 GIS
 ---
 
+* `ArcGIS Open Data portal <http://opendata.arcgis.com/>`_
 * `Cambridge, MA, US, GIS data on GitHub <http://cambridgegis.github.io/gisdata.html>`_
 * `Factual Global Location Data <https://www.factual.com/>`_
 * `Geo Spatial Data from ASU <http://geodacenter.asu.edu/datalist/>`_