diff --git a/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcUrlUtility.java b/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcUrlUtility.java
index 88b269125baf..89a2b8b5cb8c 100644
--- a/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcUrlUtility.java
+++ b/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcUrlUtility.java
@@ -102,6 +102,8 @@ protected boolean removeEldestEntry(Map.Entry<String, Map<String, String>> eldes
   static final String OAUTH_REFRESH_TOKEN_PROPERTY_NAME = "OAuthRefreshToken";
   static final String OAUTH_CLIENT_ID_PROPERTY_NAME = "OAuthClientId";
   static final String OAUTH_CLIENT_SECRET_PROPERTY_NAME = "OAuthClientSecret";
+  static final String DEFAULT_OAUTH_CLIENT_ID = "977385342095.apps.googleusercontent.com";
+  static final String DEFAULT_OAUTH_CLIENT_SECRET = "wbER7576mc_1YOII0dGk7jEE";
   static final String ENABLE_HTAPI_PROPERTY_NAME = "EnableHighThroughputAPI";
   static final String PROXY_HOST_PROPERTY_NAME = "ProxyHost";
   static final String PROXY_PORT_PROPERTY_NAME = "ProxyPort";
diff --git a/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/DataSource.java b/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/DataSource.java
index 9b38f2fed498..1c3344b9b6d1 100644
--- a/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/DataSource.java
+++ b/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/DataSource.java
@@ -960,7 +960,9 @@ public void setDestinationDatasetExpirationTime(long destinationDatasetExpiratio
   }
 
   public String getOAuthClientId() {
-    return oAuthClientId;
+    return oAuthClientId != null && !oAuthClientId.trim().isEmpty()
+        ? oAuthClientId
+        : BigQueryJdbcUrlUtility.DEFAULT_OAUTH_CLIENT_ID;
   }
 
   public void setOAuthClientId(String oAuthClientId) {
@@ -968,7 +970,9 @@ public void setOAuthClientId(String oAuthClientId) {
   }
 
   public String getOAuthClientSecret() {
-    return oAuthClientSecret;
+    return oAuthClientSecret != null && !oAuthClientSecret.trim().isEmpty()
+        ? oAuthClientSecret
+        : BigQueryJdbcUrlUtility.DEFAULT_OAUTH_CLIENT_SECRET;
   }
 
   public void setOAuthClientSecret(String oAuthClientSecret) {
diff --git a/java-bigquery/google-cloud-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcOAuthUtilityTest.java b/java-bigquery/google-cloud-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcOAuthUtilityTest.java
index adb7526cf6a5..f785173c00c1 100644
--- a/java-bigquery/google-cloud-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcOAuthUtilityTest.java
+++ b/java-bigquery/google-cloud-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryJdbcOAuthUtilityTest.java
@@ -218,6 +218,22 @@ public void testParseOAuthPropsForUserAuth() {
     assertThat(authProperties.get("OAuthClientSecret")).isEqualTo("secret");
   }
 
+  @Test
+  public void testParseOAuthPropsForUserAuthDefault() {
+    Map<String, String> authProperties =
+        BigQueryJdbcOAuthUtility.parseOAuthProperties(
+            DataSource.fromUrl(
+                "jdbc:bigquery://https://www.googleapis.com/bigquery/v2:443;"
+                    + "OAuthType=1;ProjectId=MyBigQueryProject;"),
+            null);
+
+    assertThat(authProperties.get("OAuthType")).isEqualTo("GOOGLE_USER_ACCOUNT");
+    assertThat(authProperties.get("OAuthClientId"))
+        .isEqualTo(BigQueryJdbcUrlUtility.DEFAULT_OAUTH_CLIENT_ID);
+    assertThat(authProperties.get("OAuthClientSecret"))
+        .isEqualTo(BigQueryJdbcUrlUtility.DEFAULT_OAUTH_CLIENT_SECRET);
+  }
+
   @Test
   public void testGenerateUserAuthURL() {
     try {