diff --git a/.gitignore b/.gitignore
index 2da125803c7..3194c791e4c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -301,6 +301,15 @@ icu4c/source/tools/gencnval/Makefile
 icu4c/source/tools/gencnval/Release
 icu4c/source/tools/gencnval/gencnval
 icu4c/source/tools/gencnval/gencnval.[0-9]
+icu4c/source/tools/genctd/*.d
+icu4c/source/tools/genctd/*.o
+icu4c/source/tools/genctd/*.pdb
+icu4c/source/tools/genctd/*.plg
+icu4c/source/tools/genctd/Debug
+icu4c/source/tools/genctd/Makefile
+icu4c/source/tools/genctd/Release
+icu4c/source/tools/genctd/genctd
+icu4c/source/tools/genctd/genctd.1
 icu4c/source/tools/genfchk/Debug
 icu4c/source/tools/genfchk/Makefile
 icu4c/source/tools/genfchk/genfchk
diff --git a/icu4c/source/tools/genctd/.cvsignore b/icu4c/source/tools/genctd/.cvsignore
new file mode 100644
index 00000000000..ae431eb547e
--- /dev/null
+++ b/icu4c/source/tools/genctd/.cvsignore
@@ -0,0 +1,9 @@
+*.d
+*.o
+*.pdb
+*.plg
+Debug
+Makefile
+Release
+genctd
+genctd.1