diff --git a/config/metrics.go b/config/metrics.go
index 0643ad485..226a4e789 100644
--- a/config/metrics.go
+++ b/config/metrics.go
@@ -15,6 +15,7 @@ type MetricsManager struct {
 	mu          sync.Mutex
 	serviceName string
 	addr        string
+	basicAuth   string
 	srv         *http.Server
 }
 
@@ -60,7 +61,7 @@ func (mgr *MetricsManager) updateInfo(cfg *Config) {
 }
 
 func (mgr *MetricsManager) updateServer(cfg *Config) {
-	if cfg.Options.MetricsAddr == mgr.addr {
+	if cfg.Options.MetricsAddr == mgr.addr && cfg.Options.MetricsBasicAuth == mgr.basicAuth {
 		return
 	}
 
@@ -73,6 +74,7 @@ func (mgr *MetricsManager) updateServer(cfg *Config) {
 	}
 
 	mgr.addr = cfg.Options.MetricsAddr
+	mgr.basicAuth = cfg.Options.MetricsBasicAuth
 	if mgr.addr == "" {
 		log.Info().Msg("metrics: http server disabled")
 		return
@@ -86,6 +88,10 @@ func (mgr *MetricsManager) updateServer(cfg *Config) {
 		return
 	}
 
+	if username, password, ok := cfg.Options.GetMetricsBasicAuth(); ok {
+		handler = httputil.RequireBasicAuth(handler, username, password)
+	}
+
 	mgr.srv, err = httputil.NewServer(&httputil.ServerOptions{
 		Addr:     mgr.addr,
 		Insecure: true,
diff --git a/config/metrics_test.go b/config/metrics_test.go
index 49c95c16b..2e8cc4175 100644
--- a/config/metrics_test.go
+++ b/config/metrics_test.go
@@ -1,12 +1,14 @@
 package config
 
 import (
+	"encoding/base64"
 	"fmt"
 	"net"
 	"net/http"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestMetricsManager(t *testing.T) {
@@ -54,3 +56,32 @@ func TestMetricsManager(t *testing.T) {
 	assert.Equal(t, 500, getStatusCode(addr1))
 	assert.Equal(t, 200, getStatusCode(addr2))
 }
+
+func TestMetricsManagerBasicAuth(t *testing.T) {
+	li1, err := net.Listen("tcp", "127.0.0.1:0")
+	if !assert.NoError(t, err) {
+		return
+	}
+	addr1 := li1.Addr().String()
+	li1.Close()
+
+	src := NewStaticSource(&Config{
+		Options: &Options{
+			MetricsAddr:      addr1,
+			MetricsBasicAuth: base64.StdEncoding.EncodeToString([]byte("x:y")),
+		},
+	})
+	mgr := NewMetricsManager(src)
+	defer mgr.Close()
+
+	res, err := http.Get(fmt.Sprintf("http://%s/metrics", addr1))
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusUnauthorized, res.StatusCode)
+
+	req, err := http.NewRequest("GET", fmt.Sprintf("http://%s/metrics", addr1), nil)
+	require.NoError(t, err)
+	req.SetBasicAuth("x", "y")
+	res, err = http.DefaultClient.Do(req)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, res.StatusCode)
+}
diff --git a/config/options.go b/config/options.go
index b7531894c..fe65a9621 100644
--- a/config/options.go
+++ b/config/options.go
@@ -186,6 +186,8 @@ type Options struct {
 
 	// Address/Port to bind to for prometheus metrics
 	MetricsAddr string `mapstructure:"metrics_address" yaml:"metrics_address,omitempty"`
+	// - require basic auth for prometheus metrics, base64 encoded user:pass string
+	MetricsBasicAuth string `mapstructure:"metrics_basic_auth" yaml:"metrics_basic_auth,omitempty"`
 
 	// Tracing shared settings
 	TracingProvider   string  `mapstructure:"tracing_provider" yaml:"tracing_provider,omitempty"`
@@ -693,6 +695,18 @@ func (o *Options) Validate() error {
 		return fmt.Errorf("config: %w", err)
 	}
 
+	// validate metrics basic auth
+	if o.MetricsBasicAuth != "" {
+		str, err := base64.StdEncoding.DecodeString(o.MetricsBasicAuth)
+		if err != nil {
+			return fmt.Errorf("config: metrics_basic_auth must be a base64 encoded string")
+		}
+
+		if !strings.Contains(string(str), ":") {
+			return fmt.Errorf("config: metrics_basic_auth should contain a user name and password separated by a colon")
+		}
+	}
+
 	return nil
 }
 
@@ -759,6 +773,25 @@ func (o *Options) GetAllPolicies() []Policy {
 	return policies
 }
 
+// GetMetricsBasicAuth gets the metrics basic auth username and password.
+func (o *Options) GetMetricsBasicAuth() (username, password string, ok bool) {
+	if o.MetricsBasicAuth == "" {
+		return "", "", false
+	}
+
+	bs, err := base64.StdEncoding.DecodeString(o.MetricsBasicAuth)
+	if err != nil {
+		return "", "", false
+	}
+
+	idx := bytes.Index(bs, []byte{':'})
+	if idx == -1 {
+		return "", "", false
+	}
+
+	return string(bs[:idx]), string(bs[idx+1:]), true
+}
+
 // Checksum returns the checksum of the current options struct
 func (o *Options) Checksum() uint64 {
 	return hashutil.MustHash(o)
@@ -900,6 +933,9 @@ func (o *Options) ApplySettings(settings *config.Settings) {
 	if settings.MetricsAddress != nil {
 		o.MetricsAddr = settings.GetMetricsAddress()
 	}
+	if settings.MetricsBasicAuth != nil {
+		o.MetricsBasicAuth = settings.GetMetricsBasicAuth()
+	}
 	if settings.TracingProvider != nil {
 		o.TracingProvider = settings.GetTracingProvider()
 	}
diff --git a/docs/reference/readme.md b/docs/reference/readme.md
index 9cb9a8a23..c0aefc4dd 100644
--- a/docs/reference/readme.md
+++ b/docs/reference/readme.md
@@ -496,6 +496,20 @@ As of `v0.9`, Pomerium uses [envoy](https://www.envoyproxy.io/) for the data pla
 All metrics coming from envoy will be labeled with `service="pomerium"` or `service="pomerium-proxy"`, depending if you're running all-in-one or distributed service mode.
 
 
+### Metrics Basic Authentication
+- Environmental Variable: `METRICS_BASIC_AUTH`
+- Config File Key: `metrics_basic_auth`
+- Type: base64 encoded `string` of `username:password`
+- Example: `eDp5` (for username: x, and password: y)
+- Default: ``
+- Optional
+
+Require [Basic HTTP Authentication](https://tools.ietf.org/html/rfc7617) to access the metrics endpoint.
+
+To support this in Prometheus, consult the `basic_auth` option in the [`scrape_config`](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#scrape_config)
+documentation.
+
+
 ### Proxy Log Level
 - Environmental Variable: `PROXY_LOG_LEVEL`
 - Config File Key: `proxy_log_level`
diff --git a/docs/reference/settings.yaml b/docs/reference/settings.yaml
index 478d6256f..31449a0e4 100644
--- a/docs/reference/settings.yaml
+++ b/docs/reference/settings.yaml
@@ -562,6 +562,20 @@ settings:
           All metrics coming from envoy will be labeled with `service="pomerium"` or `service="pomerium-proxy"`, depending if you're running all-in-one or distributed service mode.
         shortdoc: |
           Expose a prometheus format HTTP endpoint on the specified port.
+      - name: "Metrics Basic Authentication"
+        keys: ["metrics_basic_auth"]
+        attributes: |
+          - Environmental Variable: `METRICS_BASIC_AUTH`
+          - Config File Key: `metrics_basic_auth`
+          - Type: base64 encoded `string` of `username:password`
+          - Example: `eDp5` (for username: x, and password: y)
+          - Default: ``
+          - Optional
+        doc: |
+          Require [Basic HTTP Authentication](https://tools.ietf.org/html/rfc7617) to access the metrics endpoint.
+
+          To support this in Prometheus, consult the `basic_auth` option in the [`scrape_config`](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#scrape_config)
+          documentation.
       - name: "Proxy Log Level"
         keys: ["proxy_log_level"]
         attributes: |
diff --git a/internal/httputil/handlers.go b/internal/httputil/handlers.go
index bd86d23ea..75c5ae5e9 100644
--- a/internal/httputil/handlers.go
+++ b/internal/httputil/handlers.go
@@ -2,6 +2,7 @@ package httputil
 
 import (
 	"bytes"
+	"crypto/subtle"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -64,3 +65,25 @@ func (f HandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		e.ErrorResponse(w, r)
 	}
 }
+
+// RequireBasicAuth creates a new handler that requires basic auth from the client before
+// calling the underlying handler.
+func RequireBasicAuth(handler http.Handler, username, password string) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
+
+		u, p, ok := r.BasicAuth()
+		if !ok {
+			http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+			return
+		}
+
+		if subtle.ConstantTimeCompare([]byte(u), []byte(username)) != 1 ||
+			subtle.ConstantTimeCompare([]byte(p), []byte(password)) != 1 {
+			http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+			return
+		}
+
+		handler.ServeHTTP(w, r)
+	})
+}
diff --git a/pkg/grpc/config/config.pb.go b/pkg/grpc/config/config.pb.go
index c76c4ac27..e911c1db4 100644
--- a/pkg/grpc/config/config.pb.go
+++ b/pkg/grpc/config/config.pb.go
@@ -205,7 +205,8 @@ type Route struct {
 	// https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/endpoint/v3/endpoint_components.proto#envoy-v3-api-msg-config-endpoint-v3-lbendpoint
 	// optional load balancing weights assigned to upstream servers defined in TO
 	// if not specified, all upstream servers would be assigned the same weight
-	// if provided, load_balancing_weights[i] >= 1 and len(to) == len(load_balancing_weights)
+	// if provided, load_balancing_weights[i] >= 1 and len(to) ==
+	// len(load_balancing_weights)
 	LoadBalancingWeights []uint32       `protobuf:"varint,37,rep,packed,name=load_balancing_weights,json=loadBalancingWeights,proto3" json:"load_balancing_weights,omitempty"`
 	Redirect             *RouteRedirect `protobuf:"bytes,34,opt,name=redirect,proto3" json:"redirect,omitempty"`
 	// Deprecated: Do not use.
@@ -690,6 +691,7 @@ type Settings struct {
 	RefreshCooldown                                   *durationpb.Duration `protobuf:"bytes,38,opt,name=refresh_cooldown,json=refreshCooldown,proto3,oneof" json:"refresh_cooldown,omitempty"`
 	DefaultUpstreamTimeout                            *durationpb.Duration `protobuf:"bytes,39,opt,name=default_upstream_timeout,json=defaultUpstreamTimeout,proto3,oneof" json:"default_upstream_timeout,omitempty"`
 	MetricsAddress                                    *string              `protobuf:"bytes,40,opt,name=metrics_address,json=metricsAddress,proto3,oneof" json:"metrics_address,omitempty"`
+	MetricsBasicAuth                                  *string              `protobuf:"bytes,64,opt,name=metrics_basic_auth,json=metricsBasicAuth,proto3,oneof" json:"metrics_basic_auth,omitempty"`
 	TracingProvider                                   *string              `protobuf:"bytes,41,opt,name=tracing_provider,json=tracingProvider,proto3,oneof" json:"tracing_provider,omitempty"`
 	TracingSampleRate                                 *float64             `protobuf:"fixed64,42,opt,name=tracing_sample_rate,json=tracingSampleRate,proto3,oneof" json:"tracing_sample_rate,omitempty"`
 	TracingJaegerCollectorEndpoint                    *string              `protobuf:"bytes,43,opt,name=tracing_jaeger_collector_endpoint,json=tracingJaegerCollectorEndpoint,proto3,oneof" json:"tracing_jaeger_collector_endpoint,omitempty"`
@@ -1023,6 +1025,13 @@ func (x *Settings) GetMetricsAddress() string {
 	return ""
 }
 
+func (x *Settings) GetMetricsBasicAuth() string {
+	if x != nil && x.MetricsBasicAuth != nil {
+		return *x.MetricsBasicAuth
+	}
+	return ""
+}
+
 func (x *Settings) GetTracingProvider() string {
 	if x != nil && x.TracingProvider != nil {
 		return *x.TracingProvider
@@ -1426,7 +1435,7 @@ var file_config_proto_rawDesc = []byte{
 	0x30, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1a,
 	0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66,
 	0x2e, 0x4c, 0x69, 0x73, 0x74, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75,
-	0x65, 0x3a, 0x02, 0x38, 0x01, 0x22, 0xdb, 0x25, 0x0a, 0x08, 0x53, 0x65, 0x74, 0x74, 0x69, 0x6e,
+	0x65, 0x3a, 0x02, 0x38, 0x01, 0x22, 0xa5, 0x26, 0x0a, 0x08, 0x53, 0x65, 0x74, 0x74, 0x69, 0x6e,
 	0x67, 0x73, 0x12, 0x19, 0x0a, 0x05, 0x64, 0x65, 0x62, 0x75, 0x67, 0x18, 0x02, 0x20, 0x01, 0x28,
 	0x08, 0x48, 0x00, 0x52, 0x05, 0x64, 0x65, 0x62, 0x75, 0x67, 0x88, 0x01, 0x01, 0x12, 0x20, 0x0a,
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@@ -1566,172 +1575,177 @@ var file_config_proto_rawDesc = []byte{
 	0x65, 0x61, 0x6d, 0x54, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x88, 0x01, 0x01, 0x12, 0x2c, 0x0a,
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 }
 
 var (
diff --git a/pkg/grpc/config/config.proto b/pkg/grpc/config/config.proto
index 090ed3ece..dfc3592d3 100644
--- a/pkg/grpc/config/config.proto
+++ b/pkg/grpc/config/config.proto
@@ -34,7 +34,8 @@ message Route {
   // https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/endpoint/v3/endpoint_components.proto#envoy-v3-api-msg-config-endpoint-v3-lbendpoint
   // optional load balancing weights assigned to upstream servers defined in TO
   // if not specified, all upstream servers would be assigned the same weight
-  // if provided, load_balancing_weights[i] >= 1 and len(to) == len(load_balancing_weights)
+  // if provided, load_balancing_weights[i] >= 1 and len(to) ==
+  // len(load_balancing_weights)
   repeated uint32 load_balancing_weights = 37;
 
   RouteRedirect redirect = 34;
@@ -83,7 +84,6 @@ message Route {
 
   repeated Policy policies = 27;
   string id = 28;
-
 }
 
 message Policy {
@@ -145,6 +145,7 @@ message Settings {
   optional google.protobuf.Duration refresh_cooldown = 38;
   optional google.protobuf.Duration default_upstream_timeout = 39;
   optional string metrics_address = 40;
+  optional string metrics_basic_auth = 64;
   optional string tracing_provider = 41;
   optional double tracing_sample_rate = 42;
   optional string tracing_jaeger_collector_endpoint = 43;