diff --git a/.changelog/11364.txt b/.changelog/11364.txt
new file mode 100644
index 000000000..a394fc4e0
--- /dev/null
+++ b/.changelog/11364.txt
@@ -0,0 +1,3 @@
+```release-note:improvement
+cli: Allow specifying namesapce and region in the `nomad ui` command
+```
diff --git a/command/ui.go b/command/ui.go
index c74f9b0fb..b3a0f1310 100644
--- a/command/ui.go
+++ b/command/ui.go
@@ -29,7 +29,7 @@ object. Supported identifiers are jobs, allocations and nodes.
 
 General Options:
 
-  ` + generalOptionsUsage(usageOptsDefault|usageOptsNoNamespace) + `
+  ` + generalOptionsUsage(usageOptsDefault) + `
 
 UI Options
 
@@ -116,6 +116,17 @@ func (c *UiCommand) Run(args []string) int {
 		return 1
 	}
 
+	// Set query params if necessary
+	qp := url.Query()
+	if ns := c.clientConfig().Namespace; ns != "" {
+		qp.Add("namespace", ns)
+	}
+	if region := c.clientConfig().Region; region != "" {
+		qp.Add("region", region)
+	}
+	url.RawQuery = qp.Encode()
+
+	// Set one-time secret
 	var ottSecret string
 	if authenticate {
 		ott, _, err := client.ACLTokens().UpsertOneTimeToken(nil)
@@ -185,7 +196,9 @@ func (c *UiCommand) Run(args []string) int {
 	var output string
 	if authenticate && ottSecret != "" {
 		output = fmt.Sprintf("Opening URL %q with one-time token", url.String())
-		url.RawQuery = fmt.Sprintf("ott=%s", ottSecret)
+		qp := url.Query()
+		qp.Add("ott", ottSecret)
+		url.RawQuery = qp.Encode()
 	} else {
 		output = fmt.Sprintf("Opening URL %q", url.String())
 	}
diff --git a/command/ui_test.go b/command/ui_test.go
new file mode 100644
index 000000000..5e22b9376
--- /dev/null
+++ b/command/ui_test.go
@@ -0,0 +1,112 @@
+package command
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/mitchellh/cli"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCommand_Ui(t *testing.T) {
+	t.Parallel()
+
+	type testCaseSetupFn func(*testing.T)
+
+	cases := []struct {
+		Name        string
+		SetupFn     testCaseSetupFn
+		Args        []string
+		ExpectedURL string
+	}{
+		{
+			Name:        "default values",
+			ExpectedURL: "http://127.0.0.1:4646",
+		},
+		{
+			Name:        "set namespace via flag",
+			Args:        []string{"-namespace=dev"},
+			ExpectedURL: "http://127.0.0.1:4646?namespace=dev",
+		},
+		{
+			Name:        "set region via flag",
+			Args:        []string{"-region=earth"},
+			ExpectedURL: "http://127.0.0.1:4646?region=earth",
+		},
+		{
+			Name:        "set region and namespace via flag",
+			Args:        []string{"-region=earth", "-namespace=dev"},
+			ExpectedURL: "http://127.0.0.1:4646?namespace=dev&region=earth",
+		},
+		{
+			Name: "set namespace via env var",
+			SetupFn: func(t *testing.T) {
+				setEnv(t, "NOMAD_NAMESPACE", "dev")
+			},
+			ExpectedURL: "http://127.0.0.1:4646?namespace=dev",
+		},
+		{
+			Name: "set region via flag",
+			SetupFn: func(t *testing.T) {
+				setEnv(t, "NOMAD_REGION", "earth")
+			},
+			ExpectedURL: "http://127.0.0.1:4646?region=earth",
+		},
+		{
+			Name: "set region and namespace via flag",
+			SetupFn: func(t *testing.T) {
+				setEnv(t, "NOMAD_REGION", "earth")
+				setEnv(t, "NOMAD_NAMESPACE", "dev")
+			},
+			ExpectedURL: "http://127.0.0.1:4646?namespace=dev&region=earth",
+		},
+		{
+			Name: "set region and namespace via flag",
+			SetupFn: func(t *testing.T) {
+				setEnv(t, "NOMAD_REGION", "earth")
+				setEnv(t, "NOMAD_NAMESPACE", "dev")
+			},
+			ExpectedURL: "http://127.0.0.1:4646?namespace=dev&region=earth",
+		},
+		{
+			Name: "flags have higher precedence",
+			SetupFn: func(t *testing.T) {
+				setEnv(t, "NOMAD_REGION", "earth")
+				setEnv(t, "NOMAD_NAMESPACE", "dev")
+			},
+			Args: []string{
+				"-region=mars",
+				"-namespace=prod",
+			},
+			ExpectedURL: "http://127.0.0.1:4646?namespace=prod&region=mars",
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.Name, func(t *testing.T) {
+			// Make sure environment variables are clean.
+			setEnv(t, "NOMAD_NAMESPACE", "")
+			setEnv(t, "NOMAD_REGION", "")
+
+			// Setup fake CLI UI and test case
+			ui := cli.NewMockUi()
+			cmd := &UiCommand{Meta: Meta{Ui: ui}}
+
+			if tc.SetupFn != nil {
+				tc.SetupFn(t)
+			}
+
+			// Don't try to open a browser.
+			args := append(tc.Args, "-show-url")
+
+			if code := cmd.Run(args); code != 0 {
+				require.Equal(t, 0, code, "expected exit code 0, got %d", code)
+			}
+
+			got := ui.OutputWriter.String()
+			expected := fmt.Sprintf("URL for web UI: %s", tc.ExpectedURL)
+			require.Equal(t, expected, strings.TrimSpace(got))
+		})
+	}
+}
diff --git a/website/content/docs/commands/ui.mdx b/website/content/docs/commands/ui.mdx
index 1ad5370ed..8c585e688 100644
--- a/website/content/docs/commands/ui.mdx
+++ b/website/content/docs/commands/ui.mdx
@@ -29,7 +29,7 @@ storage for authentication.
 
 ## General Options
 
-@include 'general_options_no_namespace.mdx'
+@include 'general_options.mdx'
 
 ## UI Options