diff --git a/icu4c/source/common/cstring.c b/icu4c/source/common/cstring.c
index 4847431e0a..59c0226757 100644
--- a/icu4c/source/common/cstring.c
+++ b/icu4c/source/common/cstring.c
@@ -21,9 +21,7 @@
 
 
 
-#include <stdio.h>
 #include <stdlib.h>
-#include <ctype.h>
 #include "unicode/utypes.h"
 #include "unicode/putil.h"
 #include "cmemory.h"
@@ -88,7 +86,6 @@ void T_CString_integerToString(char* buffer, int32_t i, int32_t radix)
   return;
 }
 
-#include <stdio.h>
 
 int32_t
 T_CString_stringToInteger(const char *integerString, int32_t radix)
diff --git a/icu4c/source/common/ucmp8.c b/icu4c/source/common/ucmp8.c
index 46612e9a29..35dedb4073 100644
--- a/icu4c/source/common/ucmp8.c
+++ b/icu4c/source/common/ucmp8.c
@@ -10,10 +10,6 @@
 #include <stdlib.h>
 #endif
 
-#ifndef _STDIO_H
-#include <stdio.h>
-#endif
-
 
 #include "ucmp8.h"
 #include "cmemory.h"
diff --git a/icu4c/source/common/ucnv_bld.c b/icu4c/source/common/ucnv_bld.c
index f1a2cc9eb8..4194dab0a7 100644
--- a/icu4c/source/common/ucnv_bld.c
+++ b/icu4c/source/common/ucnv_bld.c
@@ -33,9 +33,9 @@
 #include "cmemory.h"
 #include "filestrm.h"
 
-#include <stdio.h>
 
 #if 0
+#include <stdio.h>
 extern void UCNV_DEBUG_LOG(char *what, char *who, void *p, int l);
 #define UCNV_DEBUG_LOG(x,y,z) UCNV_DEBUG_LOG(x,y,z,__LINE__)
 #else
diff --git a/icu4c/source/common/uresbund.c b/icu4c/source/common/uresbund.c
index 6a408c0532..1d24a01bb2 100644
--- a/icu4c/source/common/uresbund.c
+++ b/icu4c/source/common/uresbund.c
@@ -19,7 +19,6 @@
 */
 
 #include "uresimp.h"
-#include <stdio.h>
 
 /* this is just for internal purposes. DO NOT USE! */
 static void entryCloseInt(UResourceDataEntry *resB);