diff --git a/cmd/algod/main.go b/cmd/algod/main.go
index 3e4162bf30..b67747984c 100644
--- a/cmd/algod/main.go
+++ b/cmd/algod/main.go
@@ -327,12 +327,17 @@ func run() int {
 		}
 
 		currentVersion := config.GetCurrentVersion()
+		var overrides []telemetryspec.NameValue
+		for name, val := range config.GetNonDefaultConfigValues(cfg, startupConfigCheckFields) {
+			overrides = append(overrides, telemetryspec.NameValue{Name: name, Value: val})
+		}
 		startupDetails := telemetryspec.StartupEventDetails{
 			Version:      currentVersion.String(),
 			CommitHash:   currentVersion.CommitHash,
 			Branch:       currentVersion.Branch,
 			Channel:      currentVersion.Channel,
 			InstanceHash: crypto.Hash([]byte(absolutePath)).String(),
+			Overrides:    overrides,
 		}
 
 		log.EventWithDetails(telemetryspec.ApplicationState, telemetryspec.StartupEvent, startupDetails)
@@ -369,6 +374,30 @@ func run() int {
 	return 0
 }
 
+var startupConfigCheckFields = []string{
+	"AgreementIncomingBundlesQueueLength",
+	"AgreementIncomingProposalsQueueLength",
+	"AgreementIncomingVotesQueueLength",
+	"BroadcastConnectionsLimit",
+	"CatchupBlockValidateMode",
+	"ConnectionsRateLimitingCount",
+	"ConnectionsRateLimitingWindowSeconds",
+	"GossipFanout",
+	"IncomingConnectionsLimit",
+	"IncomingMessageFilterBucketCount",
+	"IncomingMessageFilterBucketSize",
+	"LedgerSynchronousMode",
+	"MaxAcctLookback",
+	"MaxConnectionsPerIP",
+	"OutgoingMessageFilterBucketCount",
+	"OutgoingMessageFilterBucketSize",
+	"ProposalAssemblyTime",
+	"ReservedFDs",
+	"TxPoolExponentialIncreaseFactor",
+	"TxPoolSize",
+	"VerifiedTranscationsCacheSize",
+}
+
 func resolveDataDir() string {
 	// Figure out what data directory to tell algod to use.
 	// If not specified on cmdline with '-d', look for default in environment.
diff --git a/config/config_test.go b/config/config_test.go
index 454f52c613..1e1915faa3 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -26,6 +26,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
 	"github.com/algorand/go-algorand/protocol"
@@ -551,3 +552,31 @@ func TestLocalVersionField(t *testing.T) {
 	expectedTag = expectedTag[:len(expectedTag)-1]
 	require.Equal(t, expectedTag, string(field.Tag))
 }
+
+func TestGetNonDefaultConfigValues(t *testing.T) {
+	partitiontest.PartitionTest(t)
+
+	cfg := GetDefaultLocal()
+
+	// set 4 non-default values
+	cfg.AgreementIncomingBundlesQueueLength = 2
+	cfg.AgreementIncomingProposalsQueueLength = 200
+	cfg.TxPoolSize = 30
+	cfg.Archival = true
+
+	// ask for 2 of them
+	ndmap := GetNonDefaultConfigValues(cfg, []string{"AgreementIncomingBundlesQueueLength", "TxPoolSize"})
+
+	// assert correct
+	expected := map[string]interface{}{
+		"AgreementIncomingBundlesQueueLength": uint64(2),
+		"TxPoolSize":                          int(30),
+	}
+	assert.Equal(t, expected, ndmap)
+
+	// ask for field that doesn't exist: should skip
+	assert.Equal(t, expected, GetNonDefaultConfigValues(cfg, []string{"Blah", "AgreementIncomingBundlesQueueLength", "TxPoolSize"}))
+
+	// check unmodified defaults
+	assert.Empty(t, GetNonDefaultConfigValues(GetDefaultLocal(), []string{"AgreementIncomingBundlesQueueLength", "TxPoolSize"}))
+}
diff --git a/config/migrate.go b/config/migrate.go
index 9fd9c86076..405314c628 100644
--- a/config/migrate.go
+++ b/config/migrate.go
@@ -198,3 +198,25 @@ func getVersionedDefaultLocalConfig(version uint32) (local Local) {
 	}
 	return
 }
+
+// GetNonDefaultConfigValues takes a provided cfg and list of field names, and returns a map of all values in cfg
+// that are not set to the default for the latest version.
+func GetNonDefaultConfigValues(cfg Local, fieldNames []string) map[string]interface{} {
+	defCfg := GetDefaultLocal()
+	ret := make(map[string]interface{})
+
+	for _, fieldName := range fieldNames {
+		defField := reflect.ValueOf(defCfg).FieldByName(fieldName)
+		if !defField.IsValid() {
+			continue
+		}
+		cfgField := reflect.ValueOf(cfg).FieldByName(fieldName)
+		if !cfgField.IsValid() {
+			continue
+		}
+		if !reflect.DeepEqual(defField.Interface(), cfgField.Interface()) {
+			ret[fieldName] = cfgField.Interface()
+		}
+	}
+	return ret
+}
diff --git a/logging/telemetryspec/event.go b/logging/telemetryspec/event.go
index 81d2283241..a759bb261d 100644
--- a/logging/telemetryspec/event.go
+++ b/logging/telemetryspec/event.go
@@ -29,6 +29,12 @@ type Event string
 // StartupEvent event
 const StartupEvent Event = "Startup"
 
+// NameValue defines a named value, for use in an array reported to telemetry.
+type NameValue struct {
+	Name  string
+	Value interface{}
+}
+
 // StartupEventDetails contains details for the StartupEvent
 type StartupEventDetails struct {
 	Version      string
@@ -36,6 +42,7 @@ type StartupEventDetails struct {
 	Branch       string
 	Channel      string
 	InstanceHash string
+	Overrides    []NameValue
 }
 
 // HeartbeatEvent is sent periodically to indicate node is running