diff --git a/.gitignore b/.gitignore
index 84f4f292b2c..fb98e9b2cca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -96,6 +96,7 @@ icu4c/source/test/ieeetest/Makefile
 icu4c/source/test/ieeetest/Release
 icu4c/source/test/ieeetest/ieeetest
 icu4c/source/test/intltest/*.d
+icu4c/source/test/intltest/*.plg
 icu4c/source/test/intltest/Debug
 icu4c/source/test/intltest/Makefile
 icu4c/source/test/intltest/Release
@@ -129,6 +130,7 @@ icu4c/source/tools/genccode/genccode
 icu4c/source/tools/genccode/tmp
 icu4c/source/tools/gencmn/*.d
 icu4c/source/tools/gencmn/*.pdb
+icu4c/source/tools/gencmn/*.plg
 icu4c/source/tools/gencmn/Debug
 icu4c/source/tools/gencmn/Makefile
 icu4c/source/tools/gencmn/Release
@@ -183,6 +185,7 @@ icu4c/source/tools/gentz/tmp
 icu4c/source/tools/icupkg.inc
 icu4c/source/tools/makeconv/*.d
 icu4c/source/tools/makeconv/*.pdb
+icu4c/source/tools/makeconv/*.plg
 icu4c/source/tools/makeconv/Debug
 icu4c/source/tools/makeconv/Makefile
 icu4c/source/tools/makeconv/Release
diff --git a/icu4c/source/test/intltest/.cvsignore b/icu4c/source/test/intltest/.cvsignore
index 827ca5897cd..d3c74861533 100644
--- a/icu4c/source/test/intltest/.cvsignore
+++ b/icu4c/source/test/intltest/.cvsignore
@@ -3,3 +3,4 @@ intltest
 Debug
 Release
 Makefile
+*.plg
diff --git a/icu4c/source/tools/gencmn/.cvsignore b/icu4c/source/tools/gencmn/.cvsignore
index 7b123ffcfb3..46f916ec597 100644
--- a/icu4c/source/tools/gencmn/.cvsignore
+++ b/icu4c/source/tools/gencmn/.cvsignore
@@ -5,3 +5,4 @@ Makefile
 *.d
 *.pdb
 gencmn
+*.plg
diff --git a/icu4c/source/tools/makeconv/.cvsignore b/icu4c/source/tools/makeconv/.cvsignore
index 94615c1aac5..94a03ea521c 100644
--- a/icu4c/source/tools/makeconv/.cvsignore
+++ b/icu4c/source/tools/makeconv/.cvsignore
@@ -6,3 +6,4 @@ Makefile
 *.pdb
 makeconv
 makeconv.[0-9]
+*.plg