diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 44473099cee00f225cf274cae24c1cb2f93f9f6e..978c422d470b1663f7dfda8c67f35f9092c38848 100755
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -1121,7 +1121,7 @@ for the `SimpleRequest.response_type`. If the server does not support the
 Server gets the default SimpleRequest proto as the request. The content of the
 request is ignored. It returns the SimpleResponse proto with the payload set
 to current timestamp.  The timestamp is an integer representing current time
-with nanosecond resolution. This integer is formated as ASCII decimal in the
+with nanosecond resolution. This integer is formatted as ASCII decimal in the
 response. The format is not really important as long as the response payload
 is different for each request. In addition it adds
   1. cache control headers such that the response can be cached by proxies in
diff --git a/examples/csharp/HelloworldXamarin/iOS/AppDelegate.cs b/examples/csharp/HelloworldXamarin/iOS/AppDelegate.cs
index 16a071c4d600a3bdc2d80b850c61f2fea9abaa25..53835f89dac0e35f77fdcf373dddffc3a4bfd32e 100644
--- a/examples/csharp/HelloworldXamarin/iOS/AppDelegate.cs
+++ b/examples/csharp/HelloworldXamarin/iOS/AppDelegate.cs
@@ -58,7 +58,7 @@ namespace HelloworldXamarin.iOS
 
         public override void WillEnterForeground(UIApplication application)
         {
-            // Called as part of the transiton from background to active state.
+            // Called as part of the transition from background to active state.
             // Here you can undo many of the changes made on entering the background.
         }
 
diff --git a/examples/python/cancellation/README.md b/examples/python/cancellation/README.md
index 26ef61c329f9ef2bf2e4e532ce7dfa0ec6e17161..87d0c76d9b1417f1e1c2a1ef0b14bdd480362c5a 100644
--- a/examples/python/cancellation/README.md
+++ b/examples/python/cancellation/README.md
@@ -76,7 +76,7 @@ catch the `RpcError` raised by the for loop upon cancellation.
 
 #### Cancellation on the Server Side
 
-A server is reponsible for cancellation in two ways. It must respond in some way
+A server is responsible for cancellation in two ways. It must respond in some way
 when a client initiates a cancellation, otherwise long-running computations
 could continue indefinitely.
 
diff --git a/examples/python/cancellation/hash_name.proto b/examples/python/cancellation/hash_name.proto
index 7b4e47e056f1d5177d3cc8eaac409ab887c3b501..262f12b21f8424cbbc02bd1bae0613db1166ad02 100644
--- a/examples/python/cancellation/hash_name.proto
+++ b/examples/python/cancellation/hash_name.proto
@@ -21,7 +21,7 @@ message HashNameRequest {
   // The string that is desired in the secret's hash.
   string desired_name = 1;
 
-  // The ideal Hamming distance betwen desired_name and the secret that will
+  // The ideal Hamming distance between desired_name and the secret that will
   // be searched for.
   int32 ideal_hamming_distance = 2;
 
diff --git a/examples/python/data_transmission/README.en.md b/examples/python/data_transmission/README.en.md
index d96392905494b89468bb9ef4cc19b7d675f1891a..b935943477fb768b94b9519d74367d3057f9380f 100644
--- a/examples/python/data_transmission/README.en.md
+++ b/examples/python/data_transmission/README.en.md
@@ -1,6 +1,6 @@
 ##  Data transmission demo for using gRPC in Python
 
-Four ways of data transmission when gRPC is used in Python.  [Offical Guide](<https://grpc.io/docs/guides/concepts/#unary-rpc>)
+Four ways of data transmission when gRPC is used in Python.  [Official Guide](<https://grpc.io/docs/guides/concepts/#unary-rpc>)
 
 - #### unary-unary
 
diff --git a/src/compiler/ruby_generator_string-inl.h b/src/compiler/ruby_generator_string-inl.h
index 7d6b50a516dd7a8d705dd0cc1bbef923e521b829..005e9f09c7512b9e456055a42bc116a3f86bd4b3 100644
--- a/src/compiler/ruby_generator_string-inl.h
+++ b/src/compiler/ruby_generator_string-inl.h
@@ -106,7 +106,7 @@ inline grpc::string RubyPackage(const grpc::protobuf::FileDescriptor* file) {
   if (file->options().has_ruby_package()) {
     package_name = file->options().ruby_package();
 
-    // If :: is in the package convert the Ruby formated name
+    // If :: is in the package convert the Ruby formatted name
     //    -> A::B::C
     // to use the dot seperator notation
     //    -> A.B.C
diff --git a/test/cpp/util/cli_credentials.cc b/test/cpp/util/cli_credentials.cc
index 91acc904aac63f7ef49bbe91d3421207ebc3dfd7..1f7af81a3313e0815c8fe54b8745936636ccf558 100644
--- a/test/cpp/util/cli_credentials.cc
+++ b/test/cpp/util/cli_credentials.cc
@@ -41,11 +41,11 @@ DEFINE_string(
     "validation.");
 DEFINE_string(
     ssl_client_cert, "",
-    "If not empty, load this PEM formated client certificate file. Requires "
+    "If not empty, load this PEM formatted client certificate file. Requires "
     "use of --ssl_client_key.");
 DEFINE_string(
     ssl_client_key, "",
-    "If not empty, load this PEM formated private key. Requires use of "
+    "If not empty, load this PEM formatted private key. Requires use of "
     "--ssl_client_cert");
 DEFINE_string(
     channel_creds_type, "",
diff --git a/test/cpp/util/proto_file_parser.h b/test/cpp/util/proto_file_parser.h
index 1e49c98daf9f282aa01da03e2a64ece1ec411263..114f5cba7c630a9612ea313ded1933d0a17a8c08 100644
--- a/test/cpp/util/proto_file_parser.h
+++ b/test/cpp/util/proto_file_parser.h
@@ -63,7 +63,7 @@ class ProtoFileParser {
   /// \param is_json_format if \c true the \c formatted_proto is treated as a
   ///        json-formatted proto, otherwise it is treated as a text-formatted
   ///        proto
-  /// \return the serialised binary proto represenation of \c formatted_proto
+  /// \return the serialised binary proto representation of \c formatted_proto
   grpc::string GetSerializedProtoFromMethod(const grpc::string& method,
                                             const grpc::string& formatted_proto,
                                             bool is_request,
@@ -72,7 +72,7 @@ class ProtoFileParser {
   /// Converts a text or json string to its proto representation for the given
   /// message type.
   /// \param formatted_proto the text- or json-formatted proto string
-  /// \return the serialised binary proto represenation of \c formatted_proto
+  /// \return the serialised binary proto representation of \c formatted_proto
   grpc::string GetSerializedProtoFromMessageType(
       const grpc::string& message_type_name,
       const grpc::string& formatted_proto, bool is_json_format);
diff --git a/tools/buildgen/plugins/check_attrs.py b/tools/buildgen/plugins/check_attrs.py
index 0730f8a1bbb401daeded0f2e25c40b8f1a752741..1fadd3a231076856518e3b49e49b9532eaf47325 100644
--- a/tools/buildgen/plugins/check_attrs.py
+++ b/tools/buildgen/plugins/check_attrs.py
@@ -112,7 +112,7 @@ def mako_plugin(dictionary):
 
   This validates that filegroups, libs, and target can have only valid
   attributes. This is mainly for preventing build.yaml from having
-  unnecessary and misleading attributes accidently.
+  unnecessary and misleading attributes accidentally.
   """
 
     errors = []
diff --git a/tools/gce/linux_kokoro_performance_worker_init.sh b/tools/gce/linux_kokoro_performance_worker_init.sh
index 46061a0cc67fc2008916dbd86003a0a2e8c58fc8..78c98ce1e3b3027802f3e6b2be4061dcb9fa3f80 100755
--- a/tools/gce/linux_kokoro_performance_worker_init.sh
+++ b/tools/gce/linux_kokoro_performance_worker_init.sh
@@ -92,7 +92,7 @@ sudo pypy get-pip.py
 sudo pypy -m pip install tabulate
 sudo pypy -m pip install google-api-python-client oauth2client
 # TODO(jtattermusch): for some reason, we need psutil installed
-# in pypy for kokoro_log_reader.py (strange, because the comand is
+# in pypy for kokoro_log_reader.py (strange, because the command is
 # "python kokoro_log_reader.py" and pypy is not the system default)
 sudo pypy -m pip install psutil
 
diff --git a/tools/github/pr_latency.py b/tools/github/pr_latency.py
index 34870a53260bcffc74998365154c5ddc60791666..2eb87aa66bb172db9e134598866c5427c5b2959c 100644
--- a/tools/github/pr_latency.py
+++ b/tools/github/pr_latency.py
@@ -18,7 +18,7 @@ You'll need a github API token to avoid being rate-limited. See
 https://help.github.com/articles/creating-a-personal-access-token-for-the-command-line/
 
 This script goes over the most recent 100 pull requests. For PRs with a single
-commit, it uses the PR's creation as the initial time; othewise, it uses the
+commit, it uses the PR's creation as the initial time; otherwise, it uses the
 date of the last commit. This is somewhat fragile, and imposed by the fact that
 GitHub reports a PR's updated timestamp for any event that modifies the PR (e.g.
 comments), not just the addition of new commits.
diff --git a/tools/internal_ci/linux/grpc_publish_packages.sh b/tools/internal_ci/linux/grpc_publish_packages.sh
index 87684214d846a41fd1495e410b506c75ca695d34..db5c9d0b03b71829e09c8127e08b636f7be47bd0 100755
--- a/tools/internal_ci/linux/grpc_publish_packages.sh
+++ b/tools/internal_ci/linux/grpc_publish_packages.sh
@@ -223,7 +223,7 @@ EOF
 
 # Upload the current build artifacts
 gsutil -m cp -r "$LOCAL_STAGING_TEMPDIR/${BUILD_RELPATH%%/*}" "$GCS_ARCHIVE_ROOT"
-# Upload directory indicies for subdirectories
+# Upload directory indices for subdirectories
 (
   cd "$LOCAL_BUILD_ROOT"
   find * -type d | while read -r directory
diff --git a/tools/interop_matrix/create_matrix_images.py b/tools/interop_matrix/create_matrix_images.py
index 28dc4be0f4dab7583f8eb80cbef2a42fabaac17b..0e4423b92ac71bf863502d5e104ca53dea825524 100755
--- a/tools/interop_matrix/create_matrix_images.py
+++ b/tools/interop_matrix/create_matrix_images.py
@@ -25,7 +25,7 @@ import subprocess
 import sys
 import tempfile
 
-# Langauage Runtime Matrix
+# Language Runtime Matrix
 import client_matrix
 
 python_util_dir = os.path.abspath(
diff --git a/tools/interop_matrix/create_testcases.sh b/tools/interop_matrix/create_testcases.sh
index b3e3ee6cd25e979669e3081019e8f5da95ac1b1e..5074a8abbf5c12d891b173692ba287116cd05abb 100755
--- a/tools/interop_matrix/create_testcases.sh
+++ b/tools/interop_matrix/create_testcases.sh
@@ -19,7 +19,7 @@
 # Params:
 #   LANG - The language.
 #   SKIP_TEST - If set, skip running the test cases for sanity.
-#   RELEASE - Create testcase for specific release, defautl to 'master'.
+#   RELEASE - Create testcase for specific release, default to 'master'.
 #   KEEP_IMAGE - Do not clean local docker image created for the test cases.
 
 set -e
diff --git a/tools/profiling/microbenchmarks/bm_diff/bm_main.py b/tools/profiling/microbenchmarks/bm_diff/bm_main.py
index e5061b24f57dad3b391dbd4905849c825d267343..2dbaa1b7bef508ed4651229f6c859ae0317f0053 100755
--- a/tools/profiling/microbenchmarks/bm_diff/bm_main.py
+++ b/tools/profiling/microbenchmarks/bm_diff/bm_main.py
@@ -66,7 +66,7 @@ def _args():
         '--old',
         default='old',
         type=str,
-        help='Name of baseline run to compare to. Ususally just called "old"')
+        help='Name of baseline run to compare to. Usually just called "old"')
     argp.add_argument(
         '-r',
         '--regex',
@@ -91,7 +91,7 @@ def _args():
         '--pr_comment_name',
         type=str,
         default="microbenchmarks",
-        help='Name that Jenkins will use to commen on the PR')
+        help='Name that Jenkins will use to comment on the PR')
     argp.add_argument('--counters', dest='counters', action='store_true')
     argp.add_argument('--no-counters', dest='counters', action='store_false')
     argp.set_defaults(counters=True)
diff --git a/tools/run_tests/performance/README.md b/tools/run_tests/performance/README.md
index 791270ab389cc947e305e69e4c94918cfaa22089..787f3229bc9b403ed66738e15cf2eb3a0493d8a8 100644
--- a/tools/run_tests/performance/README.md
+++ b/tools/run_tests/performance/README.md
@@ -24,7 +24,7 @@ GCE "worker" machines that are in the same zone.
   * For example, to start the grpc-go benchmark worker:
   [grpc-go worker main.go](https://github.com/grpc/grpc-go/blob/master/benchmark/worker/main.go) --driver_port <driver_port>
 
-#### Comands to start workers in different languages:
+#### Commands to start workers in different languages:
  * Note that these commands are what the top-level
    [run_performance_test.py](../run_performance_tests.py) script uses to
    build and run different workers through the
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 6786b8d53bb2612beddaa85eb1f6925b056e1767..7d2d56530af76d4f15341a0e28d10c963ac02c48 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -1380,7 +1380,7 @@ def _docker_arch_suffix(arch):
 
 
 def runs_per_test_type(arg_str):
-    """Auxilary function to parse the "runs_per_test" flag.
+    """Auxiliary function to parse the "runs_per_test" flag.
 
        Returns:
            A positive integer or 0, the latter indicating an infinite number of
@@ -1786,7 +1786,7 @@ def _shut_down_legacy_server(legacy_server_port):
 
 
 def _calculate_num_runs_failures(list_of_results):
-    """Caculate number of runs and failures for a particular test.
+    """Calculate number of runs and failures for a particular test.
 
   Args:
     list_of_results: (List) of JobResult object.