diff --git a/settings.gradle.kts b/settings.gradle.kts
index 5109cf74ffc1..45a00ee5d8de 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -213,7 +213,7 @@ include(":sdks:python:test-suites:tox:py37")
 include(":sdks:python:test-suites:tox:py38")
 include(":vendor:grpc-1_26_0")
 include(":vendor:bytebuddy-1_10_8")
-include(":vendor:calcite-1_20_0")
+include(":vendor:calcite-1_26_0")
 include(":vendor:guava-26_0-jre")
 include(":website")
 include(":runners:google-cloud-dataflow-java:worker:legacy-worker")
diff --git a/vendor/calcite-1_20_0/build.gradle b/vendor/calcite-1_26_0/build.gradle
similarity index 50%
rename from vendor/calcite-1_20_0/build.gradle
rename to vendor/calcite-1_26_0/build.gradle
index 085d822eebf3..2231b081bed1 100644
--- a/vendor/calcite-1_20_0/build.gradle
+++ b/vendor/calcite-1_26_0/build.gradle
@@ -18,29 +18,33 @@
 
 plugins { id 'org.apache.beam.vendor-java' }
 
-description = "Apache Beam :: Vendored Dependencies :: Calcite 1.20.0"
+description = "Apache Beam :: Vendored Dependencies :: Calcite 1.26.0"
 
 group = "org.apache.beam"
-version = "0.2"
+version = "0.1"
 
-def calcite_version = "1.20.0"
-def avatica_version = "1.16.0"
-def prefix = "org.apache.beam.vendor.calcite.v1_20_0"
+def calcite_version = "1.26.0"
+def avatica_version = "1.17.0"
+def prefix = "org.apache.beam.vendor.calcite.v1_26_0"
 
 List<String> packagesToRelocate = [
         "com.esri",
+        "com.fasterxml",
         "com.google.common",
-        "com.google.thirdparty",
         "com.google.protobuf",
-        "com.fasterxml",
+        "com.google.thirdparty",
+        "com.google.uzaygezen",
         "com.jayway",
         "com.yahoo",
+        "net.minidev",
         "org.apache.calcite",
         "org.apache.commons",
         "org.apache.http",
+        "org.apiguardian.api",
         "org.codehaus",
+        "org.objectweb",
         "org.pentaho",
-        "org.yaml"
+        "org.yaml",
 ]
 
 vendorJava(
@@ -48,17 +52,48 @@ vendorJava(
                 "org.apache.calcite:calcite-core:$calcite_version",
                 "org.apache.calcite:calcite-linq4j:$calcite_version",
                 "org.apache.calcite.avatica:avatica-core:$avatica_version",
-                library.java.protobuf_java,
-                library.java.slf4j_api
+        ],
+        runtimeDependencies: [
+                library.java.slf4j_api,
         ],
         relocations: packagesToRelocate.collectEntries {
             [ (it): "${prefix}.${it}" ] + [ "jdbc:calcite:": "jdbc:beam-vendor-calcite:"]
         },
         exclusions: [
+                // Code quality / Building annotations
+                "com/google/errorprone/**",
+                "com/google/j2objc/annotations/**",
+                "javax/annotation/**",
+                "org/checkerframework/**",
+                "org/jmlspecs/**",
+
+                // Runtime logging interface
                 "org/slf4j/**",
-                "**/module-info.class"
+                "org/apache/log4j/**",
+                "org/apache/logging/log4j/**",
+                "META-INF/versions/9/org/apache/logging/log4j/**",
+
+                // Optional loggers
+                "org/apache/commons/logging/impl/AvalonLogger*",
+                "org/apache/commons/logging/impl/LogKitLogger*",
+
+                // Optional JSON providers
+                "com/jayway/jsonpath/spi/json/GsonJsonProvider*",
+                "com/jayway/jsonpath/spi/json/JettisonProvider*",
+                "com/jayway/jsonpath/spi/json/JsonOrgJsonProvider*",
+                "com/jayway/jsonpath/spi/json/TapestryJsonProvider*",
+                "com/jayway/jsonpath/spi/mapper/GsonMappingProvider*",
+                "com/jayway/jsonpath/spi/mapper/JsonOrgMappingProvider*",
+                "com/jayway/jsonpath/spi/mapper/TapestryMappingProvider*",
+
+                // Unused broken code
+                "org/apache/commons/dbcp2/managed/**",
+                "org/apache/commons/pool2/proxy/**",
+                "org/codehaus/janino/AntCompilerAdapter*",
+
+                "**/module-info.class",
         ],
         groupId: group,
-        artifactId: "beam-vendor-calcite-1_20_0",
+        artifactId: "beam-vendor-calcite-1_26_0",
         version: version,
 )