diff --git a/.clang-format b/.clang-format
index 3b2451958b3..f9af7637aa3 100644
--- a/.clang-format
+++ b/.clang-format
@@ -3,5 +3,10 @@ Language:        Cpp
 BasedOnStyle:  Google
 DerivePointerAlignment: false
 PointerAlignment: Left
+---
+Language: ObjC
+BasedOnStyle: Google
+ColumnLimit: 100
+ObjCBlockIndentWidth: 2
 ...
 
diff --git a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
index 08c6a96f711..3b901ae4bff 100755
--- a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
+++ b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
@@ -16,10 +16,10 @@
 set -e
 
 # directories to run against
-DIRS="src/core/lib src/core/tsi src/core/ext src/cpp test/core test/cpp include src/compiler src/csharp src/ruby third_party/address_sorting"
+DIRS="src/core/lib src/core/tsi src/core/ext src/cpp test/core test/cpp include src/compiler src/csharp src/ruby third_party/address_sorting src/objective-c"
 
 # file matching patterns to check
-GLOB="*.h *.c *.cc"
+GLOB="*.h *.c *.cc *.m *.mm"
 
 # clang format command
 CLANG_FORMAT=${CLANG_FORMAT:-clang-format-5.0}
@@ -29,7 +29,7 @@ for dir in $DIRS
 do
   for glob in $GLOB
   do
-    files="$files `find ${CLANG_FORMAT_ROOT}/$dir -name $glob -and -not -name '*.generated.*' -and -not -name '*.pb.h' -and -not -name '*.pb.c' -and -not -name '*.pb.cc' -and -not -name end2end_tests.cc -and -not -name end2end_nosec_tests.cc -and -not -name public_headers_must_be_c89.c`"
+    files="$files `find ${CLANG_FORMAT_ROOT}/$dir -name $glob -and -not -name '*.generated.*' -and -not -name '*.pb.h' -and -not -name '*.pb.c' -and -not -name '*.pb.cc' -and -not -name '*.pbobjc.h' -and -not -name '*.pbobjc.m' -and -not -name '*.pbrpc.h' -and -not -name '*.pbrpc.m' -and -not -name end2end_tests.cc -and -not -name end2end_nosec_tests.cc -and -not -name public_headers_must_be_c89.c`"
   done
 done