diff --git a/google-cloud-clients/google-cloud-logging/src/main/java/com/google/cloud/logging/LogEntry.java b/google-cloud-clients/google-cloud-logging/src/main/java/com/google/cloud/logging/LogEntry.java
index c42125a0e60a..72be3bc22fd5 100644
--- a/google-cloud-clients/google-cloud-logging/src/main/java/com/google/cloud/logging/LogEntry.java
+++ b/google-cloud-clients/google-cloud-logging/src/main/java/com/google/cloud/logging/LogEntry.java
@@ -66,6 +66,7 @@ public LogEntry apply(com.google.logging.v2.LogEntry pb) {
   private final Map<String, String> labels;
   private final Operation operation;
   private final String trace;
+  private final String spanId;
   private final SourceLocation sourceLocation;
   private final Payload<?> payload;
 
@@ -84,6 +85,7 @@ public static class Builder {
     private Map<String, String> labels = new HashMap<>();
     private Operation operation;
     private String trace;
+    private String spanId;
     private SourceLocation sourceLocation;
     private Payload<?> payload;
 
@@ -102,6 +104,7 @@ public static class Builder {
       this.labels = new HashMap<>(entry.labels);
       this.operation = entry.operation;
       this.trace = entry.trace;
+      this.spanId = entry.spanId;
       this.sourceLocation = entry.sourceLocation;
       this.payload = entry.payload;
     }
@@ -228,6 +231,15 @@ public Builder setTrace(String trace) {
     }
 
 
+    /**
+     * Sets the ID of the trace span associated with the log entry, if any.
+     */
+    public Builder setSpanId(String spanId) {
+      this.spanId = spanId;
+      return this;
+    }
+
+
     /**
      * Sets the source code location information associated with the log entry if any.
      */
@@ -268,6 +280,7 @@ public LogEntry build() {
     this.labels = ImmutableMap.copyOf(builder.labels);
     this.operation = builder.operation;
     this.trace = builder.trace;
+    this.spanId = builder.spanId;
     this.sourceLocation = builder.sourceLocation;
     this.payload = builder.payload;
   }
@@ -363,6 +376,14 @@ public String getTrace() {
   }
 
 
+  /**
+   * Returns the ID of the trace span associated with the log entry, if any.
+   */
+  public String getSpanId() {
+    return spanId;
+  }
+
+
   /**
    * Returns the source code location information associated with the log entry, if any.
    */
@@ -386,7 +407,7 @@ public <T extends Payload> T getPayload() {
   @Override
   public int hashCode() {
     return Objects.hash(logName, resource, timestamp, receiveTimestamp, severity, insertId,
-        httpRequest, labels, operation, trace, sourceLocation, payload);
+        httpRequest, labels, operation, trace, spanId, sourceLocation, payload);
   }
 
   @Override
@@ -408,6 +429,7 @@ public boolean equals(Object obj) {
         && Objects.equals(labels, other.labels)
         && Objects.equals(operation, other.operation)
         && Objects.equals(trace, other.trace)
+        && Objects.equals(spanId, other.spanId)
         && Objects.equals(sourceLocation, other.sourceLocation)
         && Objects.equals(payload, other.payload);
   }
@@ -425,6 +447,7 @@ public String toString() {
         .add("labels", labels)
         .add("operation", operation)
         .add("trace", trace)
+        .add("spanId", spanId)
         .add("sourceLocation", sourceLocation)
         .add("payload", payload)
         .toString();
@@ -479,6 +502,9 @@ com.google.logging.v2.LogEntry toPb(String projectId) {
     if (trace != null) {
       builder.setTrace(trace);
     }
+    if (spanId != null) {
+      builder.setSpanId(spanId);
+    }
     if (sourceLocation != null) {
       builder.setSourceLocation(sourceLocation.toPb());
     }
@@ -543,6 +569,9 @@ static LogEntry fromPb(com.google.logging.v2.LogEntry entryPb) {
     if (!entryPb.getTrace().equals("")) {
       builder.setTrace(entryPb.getTrace());
     }
+    if (!entryPb.getSpanId().equals("")) {
+      builder.setSpanId(entryPb.getSpanId());
+    }
     if (!entryPb.getSourceLocation().equals(LogEntrySourceLocation.getDefaultInstance())) {
       builder.setSourceLocation(SourceLocation.fromPb(entryPb.getSourceLocation()));
     }
diff --git a/google-cloud-clients/google-cloud-logging/src/test/java/com/google/cloud/logging/LogEntryTest.java b/google-cloud-clients/google-cloud-logging/src/test/java/com/google/cloud/logging/LogEntryTest.java
index 3a7953234233..9de4e89a2a28 100644
--- a/google-cloud-clients/google-cloud-logging/src/test/java/com/google/cloud/logging/LogEntryTest.java
+++ b/google-cloud-clients/google-cloud-logging/src/test/java/com/google/cloud/logging/LogEntryTest.java
@@ -50,6 +50,7 @@ public class LogEntryTest {
       ImmutableMap.of("key1", "value1", "key2", "value2");
   private static final Operation OPERATION = Operation.of("id", "producer");
   private static final String TRACE = "trace";
+  private static final String SPAN_ID = "spanId";
   private static final SourceLocation SOURCE_LOCATION = new SourceLocation.Builder()
       .setFile("file")
       .setLine(42L)
@@ -71,6 +72,7 @@ public class LogEntryTest {
       .setLabels(LABELS)
       .setOperation(OPERATION)
       .setTrace(TRACE)
+      .setSpanId(SPAN_ID)
       .setSourceLocation(SOURCE_LOCATION)
       .build();
   private static final LogEntry JSON_ENTRY = LogEntry.newBuilder(JSON_PAYLOAD)
@@ -84,6 +86,7 @@ public class LogEntryTest {
       .setLabels(LABELS)
       .setOperation(OPERATION)
       .setTrace(TRACE)
+      .setSpanId(SPAN_ID)
       .setSourceLocation(SOURCE_LOCATION)
       .build();
   private static final LogEntry PROTO_ENTRY = LogEntry.newBuilder(PROTO_PAYLOAD)
@@ -97,6 +100,7 @@ public class LogEntryTest {
       .setLabels(LABELS)
       .setOperation(OPERATION)
       .setTrace(TRACE)
+      .setSpanId(SPAN_ID)
       .setSourceLocation(SOURCE_LOCATION)
       .build();
 
@@ -114,6 +118,7 @@ public void testOf() {
     assertNull(logEntry.getHttpRequest());
     assertNull(logEntry.getOperation());
     assertNull(logEntry.getTrace());
+    assertNull(logEntry.getSpanId());
     assertNull(logEntry.getSourceLocation());
     logEntry = LogEntry.of(LOG_NAME, RESOURCE, STRING_PAYLOAD);
     assertEquals(STRING_PAYLOAD, logEntry.getPayload());
@@ -128,6 +133,7 @@ public void testOf() {
     assertNull(logEntry.getHttpRequest());
     assertNull(logEntry.getOperation());
     assertNull(logEntry.getTrace());
+    assertNull(logEntry.getSpanId());
     assertNull(logEntry.getSourceLocation());
   }
 
@@ -143,6 +149,7 @@ public void testBuilder() {
     assertEquals(LABELS, STRING_ENTRY.getLabels());
     assertEquals(OPERATION, STRING_ENTRY.getOperation());
     assertEquals(TRACE, STRING_ENTRY.getTrace());
+    assertEquals(SPAN_ID, STRING_ENTRY.getSpanId());
     assertEquals(SOURCE_LOCATION, STRING_ENTRY.getSourceLocation());
     assertEquals(STRING_PAYLOAD, STRING_ENTRY.getPayload());
     assertEquals(LOG_NAME, JSON_ENTRY.getLogName());
@@ -155,6 +162,7 @@ public void testBuilder() {
     assertEquals(LABELS, JSON_ENTRY.getLabels());
     assertEquals(OPERATION, JSON_ENTRY.getOperation());
     assertEquals(TRACE, JSON_ENTRY.getTrace());
+    assertEquals(SPAN_ID, JSON_ENTRY.getSpanId());
     assertEquals(SOURCE_LOCATION, JSON_ENTRY.getSourceLocation());
     assertEquals(JSON_PAYLOAD, JSON_ENTRY.getPayload());
     assertEquals(LOG_NAME, PROTO_ENTRY.getLogName());
@@ -167,6 +175,7 @@ public void testBuilder() {
     assertEquals(LABELS, PROTO_ENTRY.getLabels());
     assertEquals(OPERATION, PROTO_ENTRY.getOperation());
     assertEquals(TRACE, PROTO_ENTRY.getTrace());
+    assertEquals(SPAN_ID, PROTO_ENTRY.getSpanId());
     assertEquals(SOURCE_LOCATION, PROTO_ENTRY.getSourceLocation());
     assertEquals(PROTO_PAYLOAD, PROTO_ENTRY.getPayload());
     LogEntry logEntry = LogEntry.newBuilder(STRING_PAYLOAD)
@@ -182,6 +191,7 @@ public void testBuilder() {
         .addLabel("key2", "value2")
         .setOperation(OPERATION)
         .setTrace(TRACE)
+        .setSpanId(SPAN_ID)
         .setSourceLocation(SOURCE_LOCATION)
         .build();
     assertEquals(LOG_NAME, logEntry.getLogName());
@@ -194,6 +204,7 @@ public void testBuilder() {
     assertEquals(LABELS, logEntry.getLabels());
     assertEquals(OPERATION, logEntry.getOperation());
     assertEquals(TRACE, logEntry.getTrace());
+    assertEquals(SPAN_ID, logEntry.getSpanId());
     assertEquals(SOURCE_LOCATION, logEntry.getSourceLocation());
     assertEquals(StringPayload.of("otherPayload"), logEntry.getPayload());
   }
@@ -219,6 +230,7 @@ public void testToBuilder() {
         .addLabel("key", "value")
         .setOperation(Operation.of("otherId", "otherProducer"))
         .setTrace("otherTrace")
+        .setSpanId("otherSpanId")
         .setSourceLocation(new SourceLocation.Builder().setFile("hey.java").build())
         .build();
     assertEquals("otherLogName", logEntry.getLogName());
@@ -231,6 +243,7 @@ public void testToBuilder() {
     assertEquals(ImmutableMap.of("key", "value"), logEntry.getLabels());
     assertEquals(Operation.of("otherId", "otherProducer"), logEntry.getOperation());
     assertEquals("otherTrace", logEntry.getTrace());
+    assertEquals("otherSpanId", logEntry.getSpanId());
     assertEquals(new SourceLocation.Builder().setFile("hey.java").build(),
         logEntry.getSourceLocation());
     assertEquals(StringPayload.of("otherPayload"), logEntry.getPayload());
@@ -246,6 +259,7 @@ public void testToBuilder() {
         .setLabels(LABELS)
         .setOperation(OPERATION)
         .setTrace(TRACE)
+        .setSpanId(SPAN_ID)
         .setSourceLocation(SOURCE_LOCATION)
         .build();
     compareLogEntry(STRING_ENTRY, logEntry);
@@ -274,6 +288,7 @@ private void compareLogEntry(LogEntry expected, LogEntry value) {
     assertEquals(expected.getLabels(), value.getLabels());
     assertEquals(expected.getOperation(), value.getOperation());
     assertEquals(expected.getTrace(), value.getTrace());
+    assertEquals(expected.getSpanId(), value.getSpanId());
     assertEquals(expected.getSourceLocation(), value.getSourceLocation());
     assertEquals(expected.getPayload(), value.getPayload());
     assertEquals(expected.hashCode(), value.hashCode());