diff --git a/.gitignore b/.gitignore
index 28a8e2a55b1..6e00487d67d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,6 +52,10 @@ icu4c/source/config/Makefile.inc
 icu4c/source/data/*.brk
 icu4c/source/data/*.cnv
 icu4c/source/data/*.dat
+icu4c/source/data/*.dll
+icu4c/source/data/*.exp
+icu4c/source/data/*.lib
+icu4c/source/data/*.obj
 icu4c/source/data/*.res
 icu4c/source/data/.links
 icu4c/source/data/Makefile
diff --git a/icu4c/source/data/.cvsignore b/icu4c/source/data/.cvsignore
index 8761249dcde..2b734046fc2 100644
--- a/icu4c/source/data/.cvsignore
+++ b/icu4c/source/data/.cvsignore
@@ -4,3 +4,7 @@ Makefile
 *.dat
 *.res
 *.brk
+*.dll
+*.exp
+*.obj
+*.lib