diff --git a/connector/github/github.go b/connector/github/github.go
index 831a8f13fa..434f23718e 100644
--- a/connector/github/github.go
+++ b/connector/github/github.go
@@ -325,6 +325,8 @@ func (c *githubConnector) getGroups(ctx context.Context, client *http.Client, gr
 		return c.groupsForOrgs(ctx, client, userLogin)
 	} else if c.org != "" {
 		return c.teamsForOrg(ctx, client, c.org)
+	} else if groupScope {
+		return c.userGroups(ctx, client)
 	}
 	return nil, nil
 }
@@ -572,10 +574,12 @@ func (c *githubConnector) userInOrg(ctx context.Context, client *http.Client, us
 // https://developer.github.com/v3/orgs/teams/#response-12
 type team struct {
 	Name string `json:"name"`
-	Org  struct {
-		Login string `json:"login"`
-	} `json:"organization"`
 	Slug string `json:"slug"`
+	Org  org    `json:"organization"`
+}
+
+type org struct {
+	Login string `json:"login"`
 }
 
 // teamsForOrg queries the GitHub API for team membership within a specific organization.
@@ -612,3 +616,76 @@ func (c *githubConnector) teamsForOrg(ctx context.Context, client *http.Client,
 
 	return groups, nil
 }
+
+func (c *githubConnector) userGroups(ctx context.Context, client *http.Client) (groups []string, err error) {
+
+	orgs, err := c.userOrgs(ctx, client)
+	if err != nil {
+		return groups, err
+	}
+
+	orgTeams, err := c.userOrgTeams(ctx, client)
+	if err != nil {
+		return groups, err
+	}
+
+	for _, org := range orgs {
+		if teams, ok := orgTeams[org]; !ok {
+			groups = append(groups, org)
+		} else {
+			for _, team := range teams {
+				groups = append(groups, org+":"+team)
+			}
+		}
+	}
+
+	return groups, err
+}
+
+func (c *githubConnector) userOrgs(ctx context.Context, client *http.Client) ([]string, error) {
+	apiURL, groups := c.apiURL+"/user/orgs", []string{}
+	for {
+		// https://developer.github.com/v3/orgs/#list-your-organizations
+		var (
+			orgs []org
+			err  error
+		)
+		if apiURL, err = get(ctx, client, apiURL, &orgs); err != nil {
+			return nil, fmt.Errorf("github: get orgs: %v", err)
+		}
+
+		for _, org := range orgs {
+			groups = append(groups, org.Login)
+		}
+
+		if apiURL == "" {
+			break
+		}
+	}
+
+	return groups, nil
+}
+
+func (c *githubConnector) userOrgTeams(ctx context.Context, client *http.Client) (map[string][]string, error) {
+	apiURL, groups := c.apiURL+"/user/teams", map[string][]string{}
+	for {
+		// https://developer.github.com/v3/orgs/teams/#list-user-teams
+		var (
+			teams []team
+			err   error
+		)
+		if apiURL, err = get(ctx, client, apiURL, &teams); err != nil {
+			return nil, fmt.Errorf("github: get teams: %v", err)
+		}
+
+		for _, team := range teams {
+			groups[team.Org.Login] = append(groups[team.Org.Login], team.Name)
+		}
+
+		if apiURL == "" {
+			break
+		}
+	}
+
+	return groups, nil
+}
diff --git a/connector/github/github_test.go b/connector/github/github_test.go
new file mode 100644
index 0000000000..57aef55427
--- /dev/null
+++ b/connector/github/github_test.go
@@ -0,0 +1,121 @@
+package github
+
+import (
+	"context"
+	"crypto/tls"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"reflect"
+	"testing"
+
+	"github.com/dexidp/dex/connector"
+)
+
+func TestUserGroups(t *testing.T) {
+
+	orgs := []org{
+		{Login: "org-1"},
+		{Login: "org-2"},
+		{Login: "org-3"},
+	}
+
+	teams := []team{
+		{Name: "team-1", Org: org{Login: "org-1"}},
+		{Name: "team-2", Org: org{Login: "org-1"}},
+		{Name: "team-3", Org: org{Login: "org-1"}},
+		{Name: "team-4", Org: org{Login: "org-2"}},
+	}
+
+	s := newTestServer(map[string]interface{}{
+		"/user/orgs":  orgs,
+		"/user/teams": teams,
+	})
+
+	connector := githubConnector{apiURL: s.URL}
+	groups, err := connector.userGroups(context.Background(), newClient())
+
+	expectNil(t, err)
+	expectEquals(t, groups, []string{
+		"org-1:team-1",
+		"org-1:team-2",
+		"org-1:team-3",
+		"org-2:team-4",
+		"org-3",
+	})
+
+	s.Close()
+}
+
+func TestUserGroupsWithoutOrgs(t *testing.T) {
+
+	s := newTestServer(map[string]interface{}{
+		"/user/orgs":  []org{},
+		"/user/teams": []team{},
+	})
+
+	connector := githubConnector{apiURL: s.URL}
+	groups, err := connector.userGroups(context.Background(), newClient())
+
+	expectNil(t, err)
+	expectEquals(t, len(groups), 0)
+
+	s.Close()
+}
+
+func TestUsernameIncludedInFederatedIdentity(t *testing.T) {
+
+	s := newTestServer(map[string]interface{}{
+		"/user": user{Login: "some-login"},
+		"/user/emails": []userEmail{{
+			Email:    "some@email.com",
+			Verified: true,
+			Primary:  true,
+		}},
+		"/login/oauth/access_token": map[string]interface{}{
+			"access_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9",
+			"expires_in":   "30",
+		},
+	})
+
+	hostURL, err := url.Parse(s.URL)
+	expectNil(t, err)
+
+	req, err := http.NewRequest("GET", hostURL.String(), nil)
+	expectNil(t, err)
+
+	githubConnector := githubConnector{apiURL: s.URL, hostName: hostURL.Host, httpClient: newClient()}
+	identity, err := githubConnector.HandleCallback(connector.Scopes{}, req)
+
+	expectNil(t, err)
+	expectEquals(t, identity.Username, "some-login")
+
+	s.Close()
+}
+
+func newTestServer(responses map[string]interface{}) *httptest.Server {
+	return httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(responses[r.URL.Path])
+	}))
+}
+
+func newClient() *http.Client {
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+	}
+	return &http.Client{Transport: tr}
+}
+
+func expectNil(t *testing.T, a interface{}) {
+	if a != nil {
+		t.Errorf("Expected %+v to equal nil", a)
+	}
+}
+
+func expectEquals(t *testing.T, a interface{}, b interface{}) {
+	if !reflect.DeepEqual(a, b) {
+		t.Errorf("Expected %+v to equal %+v", a, b)
+	}
+}