diff --git a/plugins/provisioners/salt/config.rb b/plugins/provisioners/salt/config.rb
index 0a99d3fc8..4d97d942c 100644
--- a/plugins/provisioners/salt/config.rb
+++ b/plugins/provisioners/salt/config.rb
@@ -12,6 +12,7 @@ module VagrantPlugins
       attr_accessor :master_config
       attr_accessor :master_key
       attr_accessor :master_pub
+      attr_accessor :grains_config
       attr_accessor :run_highstate
       attr_accessor :run_overstate
       attr_accessor :always_install
@@ -38,6 +39,7 @@ module VagrantPlugins
         @master_config = UNSET_VALUE
         @master_key = UNSET_VALUE
         @master_pub = UNSET_VALUE
+        @grains_config = UNSET_VALUE
         @run_highstate = UNSET_VALUE
         @run_overstate = UNSET_VALUE
         @always_install = UNSET_VALUE
@@ -63,6 +65,7 @@ module VagrantPlugins
         @master_config      = nil if @master_config == UNSET_VALUE
         @master_key         = nil if @master_key == UNSET_VALUE
         @master_pub         = nil if @master_pub == UNSET_VALUE
+        @grains_config      = nil if @grains_config == UNSET_VALUE
         @run_highstate      = nil if @run_highstate == UNSET_VALUE
         @run_overstate      = nil if @run_overstate == UNSET_VALUE
         @always_install     = nil if @always_install == UNSET_VALUE
@@ -115,6 +118,13 @@ module VagrantPlugins
           end
         end
 
+        if @grains_config
+          expanded = Pathname.new(@grains_config).expand_path(machine.env.root_path)
+          if !expanded.file?
+            errors << I18n.t("vagrant.provisioners.salt.grains_config_nonexist")
+          end
+        end
+
         if @install_master && !@no_minion && !@seed_master && @run_highstate
           errors << I18n.t("vagrant.provisioners.salt.must_accept_keys")
         end
diff --git a/plugins/provisioners/salt/provisioner.rb b/plugins/provisioners/salt/provisioner.rb
index a47bce2a6..87af7cc7d 100644
--- a/plugins/provisioners/salt/provisioner.rb
+++ b/plugins/provisioners/salt/provisioner.rb
@@ -75,7 +75,7 @@ module VagrantPlugins
       end
 
       def need_configure
-        @config.minion_config or @config.minion_key or @config.master_config or @config.master_key
+        @config.minion_config or @config.minion_key or @config.master_config or @config.master_key or @config.grains_config
       end
 
       def need_install
@@ -181,6 +181,11 @@ module VagrantPlugins
           @machine.env.ui.info "Copying salt master config to vm."
           @machine.communicate.upload(expanded_path(@config.master_config).to_s, temp_config_dir + "/master")
         end
+
+        if @config.grains_config
+          @machine.env.ui.info "Copying salt grains config to vm."
+          @machine.communicate.upload(expanded_path(@config.grains_config).to_s, temp_config_dir + "/grains")
+        end
       end
 
       # Copy master and minion keys to VM
diff --git a/templates/locales/en.yml b/templates/locales/en.yml
index e28106a20..9b2f273fe 100644
--- a/templates/locales/en.yml
+++ b/templates/locales/en.yml
@@ -1909,6 +1909,8 @@ en:
           The specified minion_config file could not be found.
         master_config_nonexist: |-
           The specified master_config file could not be found.
+        grains_config_nonexist: |-
+          The specified grains_config file could not be found.
         missing_key: |-
           You must include both public and private keys.
         must_accept_keys: |-
diff --git a/test/unit/plugins/provisioners/salt/config_test.rb b/test/unit/plugins/provisioners/salt/config_test.rb
index c640a7497..24bf24796 100644
--- a/test/unit/plugins/provisioners/salt/config_test.rb
+++ b/test/unit/plugins/provisioners/salt/config_test.rb
@@ -60,5 +60,23 @@ describe VagrantPlugins::Salt::Config do
         expect(result[error_key]).to be_empty
       end
     end
+
+    context "grains_config" do
+      it "fails if grains_config is set and missing" do
+        subject.grains_config = "/nope/still/not/here"
+        subject.finalize!
+
+        result = subject.validate(machine)
+        expect(result[error_key]).to_not be_empty
+      end
+
+      it "is valid if is set and not missing" do
+        subject.grains_config = File.expand_path(__FILE__)
+        subject.finalize!
+
+        result = subject.validate(machine)
+        expect(result[error_key]).to be_empty
+      end
+    end
   end
 end
diff --git a/website/docs/source/v2/provisioning/salt.html.md b/website/docs/source/v2/provisioning/salt.html.md
index f66ac7c60..ddc81fa90 100644
--- a/website/docs/source/v2/provisioning/salt.html.md
+++ b/website/docs/source/v2/provisioning/salt.html.md
@@ -56,7 +56,7 @@ on this machine. Not supported on Windows.
 `false`. Not supported on Windows.
 
 * `install_type`  (stable | git | daily | testing) - Whether to install from a
-distribution's stable package manager, git tree-ish, daily ppa, or testing repository. 
+distribution's stable package manager, git tree-ish, daily ppa, or testing repository.
 Not supported on Windows.
 
 * `install_args` (develop) - When performing a git install,
@@ -77,6 +77,7 @@ a custom salt minion config file.
 * `minion_pub`  (salt/key/minion.pub) - Path to your minion
 public key
 
+* `grains_config`  (string) - Path to a custom salt grains file.
 
 ## Master Options
 These only make sense when `install_master` is `true`.