diff --git a/integrations/pull_create_test.go b/integrations/pull_create_test.go
index 7db1ce1ecf..a62144c613 100644
--- a/integrations/pull_create_test.go
+++ b/integrations/pull_create_test.go
@@ -46,7 +46,7 @@ func testPullCreate(t *testing.T, session *TestSession, user, repo, branch strin
 func TestPullCreate(t *testing.T) {
 	prepareTestEnv(t)
 	session := loginUser(t, "user1")
-	testRepoFork(t, session)
+	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFile(t, session, "user1", "repo1", "master", "README.md")
 	testPullCreate(t, session, "user1", "repo1", "master")
 }
diff --git a/integrations/pull_merge_test.go b/integrations/pull_merge_test.go
index ddb18f8024..100298b083 100644
--- a/integrations/pull_merge_test.go
+++ b/integrations/pull_merge_test.go
@@ -48,7 +48,7 @@ func testPullCleanUp(t *testing.T, session *TestSession, user, repo, pullnum str
 func TestPullMerge(t *testing.T) {
 	prepareTestEnv(t)
 	session := loginUser(t, "user1")
-	testRepoFork(t, session)
+	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFile(t, session, "user1", "repo1", "master", "README.md")
 
 	resp := testPullCreate(t, session, "user1", "repo1", "master")
@@ -61,7 +61,7 @@ func TestPullMerge(t *testing.T) {
 func TestPullCleanUpAfterMerge(t *testing.T) {
 	prepareTestEnv(t)
 	session := loginUser(t, "user1")
-	testRepoFork(t, session)
+	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFileToNewBranch(t, session, "user1", "repo1", "master", "feature/test", "README.md")
 
 	resp := testPullCreate(t, session, "user1", "repo1", "feature/test")
diff --git a/integrations/repo_fork_test.go b/integrations/repo_fork_test.go
index bd6ec79155..f8cc2e3f3b 100644
--- a/integrations/repo_fork_test.go
+++ b/integrations/repo_fork_test.go
@@ -5,19 +5,24 @@
 package integrations
 
 import (
+	"fmt"
 	"net/http"
 	"testing"
 
+	"code.gitea.io/gitea/models"
+
 	"github.com/stretchr/testify/assert"
 )
 
-func testRepoFork(t *testing.T, session *TestSession) *TestResponse {
+func testRepoFork(t *testing.T, session *TestSession, ownerName, repoName, forkOwnerName, forkRepoName string) *TestResponse {
+	forkOwner := models.AssertExistsAndLoadBean(t, &models.User{Name: forkOwnerName}).(*models.User)
+
 	// Step0: check the existence of the to-fork repo
-	req := NewRequest(t, "GET", "/user1/repo1")
+	req := NewRequestf(t, "GET", "/%s/%s", forkOwnerName, forkRepoName)
 	resp := session.MakeRequest(t, req, http.StatusNotFound)
 
 	// Step1: go to the main page of repo
-	req = NewRequest(t, "GET", "/user2/repo1")
+	req = NewRequestf(t, "GET", "/%s/%s", ownerName, repoName)
 	resp = session.MakeRequest(t, req, http.StatusOK)
 
 	// Step2: click the fork button
@@ -31,15 +36,17 @@ func testRepoFork(t *testing.T, session *TestSession) *TestResponse {
 	htmlDoc = NewHTMLParser(t, resp.Body)
 	link, exists = htmlDoc.doc.Find("form.ui.form[action^=\"/repo/fork/\"]").Attr("action")
 	assert.True(t, exists, "The template has changed")
+	_, exists = htmlDoc.doc.Find(fmt.Sprintf(".owner.dropdown .item[data-value=\"%d\"]", forkOwner.ID)).Attr("data-value")
+	assert.True(t, exists, fmt.Sprintf("Fork owner '%s' is not present in select box", forkOwnerName))
 	req = NewRequestWithValues(t, "POST", link, map[string]string{
 		"_csrf":     htmlDoc.GetCSRF(),
-		"uid":       "1",
-		"repo_name": "repo1",
+		"uid":       fmt.Sprintf("%d", forkOwner.ID),
+		"repo_name": forkRepoName,
 	})
 	resp = session.MakeRequest(t, req, http.StatusFound)
 
 	// Step4: check the existence of the forked repo
-	req = NewRequest(t, "GET", "/user1/repo1")
+	req = NewRequestf(t, "GET", "/%s/%s", forkOwnerName, forkRepoName)
 	resp = session.MakeRequest(t, req, http.StatusOK)
 
 	return resp
@@ -48,5 +55,19 @@ func testRepoFork(t *testing.T, session *TestSession) *TestResponse {
 func TestRepoFork(t *testing.T) {
 	prepareTestEnv(t)
 	session := loginUser(t, "user1")
-	testRepoFork(t, session)
+	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
+}
+
+func TestRepoForkToOrg(t *testing.T) {
+	prepareTestEnv(t)
+	session := loginUser(t, "user2")
+	testRepoFork(t, session, "user2", "repo1", "user3", "repo1")
+
+	// Check that no more forking is allowed as user2 owns repository
+	//  and user3 organization that owner user2 is also now has forked this repository
+	req := NewRequest(t, "GET", "/user2/repo1")
+	resp := session.MakeRequest(t, req, http.StatusOK)
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	_, exists := htmlDoc.doc.Find("a.ui.button[href^=\"/repo/fork/\"]").Attr("href")
+	assert.False(t, exists, "Forking should not be allowed anymore")
 }
diff --git a/models/repo.go b/models/repo.go
index a6817f6514..9819d4b77a 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -651,6 +651,25 @@ func (repo *Repository) CanBeForked() bool {
 	return !repo.IsBare && repo.UnitEnabled(UnitTypeCode)
 }
 
+// CanUserFork returns true if specified user can fork repository.
+func (repo *Repository) CanUserFork(user *User) (bool, error) {
+	if user == nil {
+		return false, nil
+	}
+	if repo.OwnerID != user.ID && !user.HasForkedRepo(repo.ID) {
+		return true, nil
+	}
+	if err := user.GetOwnedOrganizations(); err != nil {
+		return false, err
+	}
+	for _, org := range user.OwnedOrgs {
+		if repo.OwnerID != org.ID && !org.HasForkedRepo(repo.ID) {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
 // CanEnablePulls returns true if repository meets the requirements of accepting pulls.
 func (repo *Repository) CanEnablePulls() bool {
 	return !repo.IsMirror && !repo.IsBare
diff --git a/modules/context/repo.go b/modules/context/repo.go
index 788588f8e4..88208922c8 100644
--- a/modules/context/repo.go
+++ b/modules/context/repo.go
@@ -337,6 +337,11 @@ func RepoAssignment() macaron.Handler {
 		ctx.Data["IsRepositoryAdmin"] = ctx.Repo.IsAdmin()
 		ctx.Data["IsRepositoryWriter"] = ctx.Repo.IsWriter()
 
+		if ctx.Data["CanSignedUserFork"], err = ctx.Repo.Repository.CanUserFork(ctx.User); err != nil {
+			ctx.Handle(500, "CanUserFork", err)
+			return
+		}
+
 		ctx.Data["DisableSSH"] = setting.SSH.Disabled
 		ctx.Data["ExposeAnonSSH"] = setting.SSH.ExposeAnonymous
 		ctx.Data["DisableHTTP"] = setting.Repository.DisableHTTPGit
diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index 48e17665da..f80e8cb1e5 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -61,6 +61,8 @@ func getForkRepository(ctx *context.Context) *models.Repository {
 	ctx.Data["repo_name"] = forkRepo.Name
 	ctx.Data["description"] = forkRepo.Description
 	ctx.Data["IsPrivate"] = forkRepo.IsPrivate
+	canForkToUser := forkRepo.OwnerID != ctx.User.ID && !ctx.User.HasForkedRepo(forkRepo.ID)
+	ctx.Data["CanForkToUser"] = canForkToUser
 
 	if err = forkRepo.GetOwner(); err != nil {
 		ctx.Handle(500, "GetOwner", err)
@@ -69,11 +71,23 @@ func getForkRepository(ctx *context.Context) *models.Repository {
 	ctx.Data["ForkFrom"] = forkRepo.Owner.Name + "/" + forkRepo.Name
 	ctx.Data["ForkFromOwnerID"] = forkRepo.Owner.ID
 
-	if err := ctx.User.GetOrganizations(true); err != nil {
-		ctx.Handle(500, "GetOrganizations", err)
+	if err := ctx.User.GetOwnedOrganizations(); err != nil {
+		ctx.Handle(500, "GetOwnedOrganizations", err)
 		return nil
 	}
-	ctx.Data["Orgs"] = ctx.User.Orgs
+	var orgs []*models.User
+	for _, org := range ctx.User.OwnedOrgs {
+		if forkRepo.OwnerID != org.ID && !org.HasForkedRepo(forkRepo.ID) {
+			orgs = append(orgs, org)
+		}
+	}
+	ctx.Data["Orgs"] = orgs
+
+	if canForkToUser {
+		ctx.Data["ContextUser"] = ctx.User
+	} else if len(orgs) > 0 {
+		ctx.Data["ContextUser"] = orgs[0]
+	}
 
 	return forkRepo
 }
@@ -87,7 +101,6 @@ func Fork(ctx *context.Context) {
 		return
 	}
 
-	ctx.Data["ContextUser"] = ctx.User
 	ctx.HTML(200, tplFork)
 }
 
@@ -95,15 +108,16 @@ func Fork(ctx *context.Context) {
 func ForkPost(ctx *context.Context, form auth.CreateRepoForm) {
 	ctx.Data["Title"] = ctx.Tr("new_fork")
 
+	ctxUser := checkContextUser(ctx, form.UID)
+	if ctx.Written() {
+		return
+	}
+
 	forkRepo := getForkRepository(ctx)
 	if ctx.Written() {
 		return
 	}
 
-	ctxUser := checkContextUser(ctx, form.UID)
-	if ctx.Written() {
-		return
-	}
 	ctx.Data["ContextUser"] = ctxUser
 
 	if ctx.HasError() {
diff --git a/templates/repo/header.tmpl b/templates/repo/header.tmpl
index 6baacd537b..ee6fcb388d 100644
--- a/templates/repo/header.tmpl
+++ b/templates/repo/header.tmpl
@@ -32,7 +32,7 @@
 						</div>
 						{{if .CanBeForked}}
 							<div class="ui compact labeled button" tabindex="0">
-								<a class="ui compact button {{if eq .OwnerID $.SignedUserID}}poping up{{end}}" {{if not (eq .OwnerID $.SignedUserID)}}href="{{AppSubUrl}}/repo/fork/{{.ID}}"{{else}} data-content="{{$.i18n.Tr "repo.fork_from_self"}}" data-position="top center" data-variation="tiny"{{end}}>
+								<a class="ui compact button {{if not $.CanSignedUserFork}}poping up{{end}}" {{if $.CanSignedUserFork}}href="{{AppSubUrl}}/repo/fork/{{.ID}}"{{else}} data-content="{{$.i18n.Tr "repo.fork_from_self"}}" data-position="top center" data-variation="tiny"{{end}}>
 									<i class="octicon octicon-repo-forked"></i>{{$.i18n.Tr "repo.fork"}}
 								</a>
 								<a class="ui basic label" href="{{.Link}}/forks">
diff --git a/templates/repo/pulls/fork.tmpl b/templates/repo/pulls/fork.tmpl
index 133cc92f7c..e9fbfdf2b6 100644
--- a/templates/repo/pulls/fork.tmpl
+++ b/templates/repo/pulls/fork.tmpl
@@ -19,17 +19,17 @@
 							</span>
 							<i class="dropdown icon"></i>
 							<div class="menu">
-								<div class="item" data-value="{{.SignedUser.ID}}">
-									<img class="ui mini image" src="{{.SignedUser.RelAvatarLink}}">
-									{{.SignedUser.ShortName 20}}
-								</div>
+								{{if .CanForkToUser}}
+									<div class="item" data-value="{{.SignedUser.ID}}">
+										<img class="ui mini image" src="{{.SignedUser.RelAvatarLink}}">
+										{{.SignedUser.ShortName 20}}
+									</div>
+								{{end}}
 								{{range .Orgs}}
-									{{if and (.IsOwnedBy $.SignedUser.ID) (ne .ID $.ForkFromOwnerID)}}
-										<div class="item" data-value="{{.ID}}">
-											<img class="ui mini image" src="{{.RelAvatarLink}}">
-											{{.ShortName 20}}
-										</div>
-									{{end}}
+									<div class="item" data-value="{{.ID}}">
+										<img class="ui mini image" src="{{.RelAvatarLink}}">
+										{{.ShortName 20}}
+									</div>
 								{{end}}
 							</div>
 						</div>