diff --git a/etc/config.csh/mpi b/etc/config.csh/mpi
index 3d44bf0de4..76a89c828d 100644
--- a/etc/config.csh/mpi
+++ b/etc/config.csh/mpi
@@ -6,7 +6,7 @@
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 #     Copyright (C) 2011-2016 OpenFOAM Foundation
-#     Copyright (C) 2017-2021 OpenCFD Ltd.
+#     Copyright (C) 2017-2022 OpenCFD Ltd.
 #------------------------------------------------------------------------------
 # License
 #     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
@@ -359,9 +359,6 @@ case HPMPI:
     case i686:
         set _foamFoundDir=lib/linux_ia32
         breaksw
-    case ia64:
-        set _foamFoundDir=lib/linux_ia64
-        breaksw
     endsw
 
     if ( "${_foamFoundDir}" != "" ) then
diff --git a/etc/config.csh/settings b/etc/config.csh/settings
index c42976f4f9..a0100abeeb 100644
--- a/etc/config.csh/settings
+++ b/etc/config.csh/settings
@@ -6,7 +6,7 @@
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 #     Copyright (C) 2011-2016 OpenFOAM Foundation
-#     Copyright (C) 2016-2021 OpenCFD Ltd.
+#     Copyright (C) 2016-2022 OpenCFD Ltd.
 #------------------------------------------------------------------------------
 # License
 #     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
@@ -71,10 +71,6 @@ case Linux:
         setenv WM_ARCH linux
         breaksw
 
-    case ia64:
-        setenv WM_ARCH linuxIA64
-        breaksw
-
     default:
         echo "openfoam: (`uname -m`) - unknown Linux processor type"
         breaksw
diff --git a/etc/config.sh/mpi b/etc/config.sh/mpi
index 178b308041..8f9794b411 100644
--- a/etc/config.sh/mpi
+++ b/etc/config.sh/mpi
@@ -6,7 +6,7 @@
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 #     Copyright (C) 2011-2016 OpenFOAM Foundation
-#     Copyright (C) 2017-2021 OpenCFD Ltd.
+#     Copyright (C) 2017-2022 OpenCFD Ltd.
 #------------------------------------------------------------------------------
 # License
 #     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
@@ -363,7 +363,6 @@ HPMPI)
     case "$(uname -m)" in
     x86_64) _foamFoundDir=lib/linux_amd64 ;;
     i686)   _foamFoundDir=lib/linux_ia32 ;;
-    ia64)   _foamFoundDir=lib/linux_ia64 ;;
     *)      unset _foamFoundDir ;;
     esac
 
diff --git a/etc/config.sh/settings b/etc/config.sh/settings
index 8024eb7519..0555cbb9cf 100644
--- a/etc/config.sh/settings
+++ b/etc/config.sh/settings
@@ -6,7 +6,7 @@
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 #     Copyright (C) 2011-2016 OpenFOAM Foundation
-#     Copyright (C) 2016-2021 OpenCFD Ltd.
+#     Copyright (C) 2016-2022 OpenCFD Ltd.
 #------------------------------------------------------------------------------
 # License
 #     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
@@ -68,10 +68,6 @@ Linux)
         WM_ARCH=linux
         ;;
 
-    ia64)
-        WM_ARCH=linuxIA64
-        ;;
-
     *)
         echo "openfoam: ($(uname -m)) - unknown Linux processor type" 1>&2
         ;;
diff --git a/wmake/rules/General/mplib-ia64-HPMPI b/wmake/rules/General/mplib-ia64-HPMPI
deleted file mode 100644
index db327ee7e9..0000000000
--- a/wmake/rules/General/mplib-ia64-HPMPI
+++ /dev/null
@@ -1,8 +0,0 @@
-#------------------------------------------------------------------------------
-# HPMPI rules (ia64)
-
-PFLAGS     =
-PINC       = -isystem $(MPI_ARCH_PATH)/include -D_MPICC_H
-PLIBS      = -L$(MPI_ARCH_PATH)/lib/linux_ia64 -lmpi
-
-#------------------------------------------------------------------------------
diff --git a/wmake/rules/linux64Icc/c++ b/wmake/rules/linux64Icc/c++
index e29e706a7c..b1361e92f8 100644
--- a/wmake/rules/linux64Icc/c++
+++ b/wmake/rules/linux64Icc/c++
@@ -18,5 +18,4 @@ cxxtoo      = $(Ctoo)
 
 include $(GENERAL_RULES)/Icc/link-c++
 
-#legacy: LINK_LIBS   += -L$(IA64ROOT)/lib
 #------------------------------------------------------------------------------
diff --git a/wmake/rules/linuxIA64Gcc/X b/wmake/rules/linuxIA64Gcc/X
deleted file mode 100644
index bed8bfeddf..0000000000
--- a/wmake/rules/linuxIA64Gcc/X
+++ /dev/null
@@ -1,3 +0,0 @@
-XFLAGS     =
-XINC       = $(XFLAGS) -I/usr/X11R6/include
-XLIBS      = -L/usr/X11R6/lib -lXext -lX11
diff --git a/wmake/rules/linuxIA64Gcc/c b/wmake/rules/linuxIA64Gcc/c
deleted file mode 100644
index 3bed0d729c..0000000000
--- a/wmake/rules/linuxIA64Gcc/c
+++ /dev/null
@@ -1,18 +0,0 @@
-#------------------------------------------------------------------------------
-include $(GENERAL_RULES)/Gcc/c
-
-cARCH      :=
-
-ifneq (,$(WM_COMPILE_OPTION))
-    sinclude $(DEFAULT_RULES)/c$(WM_COMPILE_OPTION)
-endif
-
-cFLAGS      = \
-    $(cARCH) $(GFLAGS) $(cWARN) $(cOPT) $(cDBUG) \
-    $(FOAM_EXTRA_CFLAGS) $(LIB_HEADER_DIRS) -fPIC
-
-ctoo        = $(WM_SCHEDULER) $(cc) $(cFLAGS) -c $< -o $@
-
-include $(GENERAL_RULES)/Gcc/link-c
-
-#------------------------------------------------------------------------------
diff --git a/wmake/rules/linuxIA64Gcc/c++ b/wmake/rules/linuxIA64Gcc/c++
deleted file mode 100644
index ca39a0a204..0000000000
--- a/wmake/rules/linuxIA64Gcc/c++
+++ /dev/null
@@ -1,24 +0,0 @@
-#------------------------------------------------------------------------------
-include $(GENERAL_RULES)/Gcc/c++
-
-c++ARCH    :=
-
-ifneq (,$(WM_COMPILE_OPTION))
-    sinclude $(DEFAULT_RULES)/c++$(WM_COMPILE_OPTION)
-endif
-
-c++FLAGS    = \
-    $(c++ARCH) $(GFLAGS) $(c++WARN) $(c++OPT) $(c++DBUG) $(ptFLAGS) \
-    $(FOAM_EXTRA_CXXFLAGS) $(LIB_HEADER_DIRS) -fPIC
-
-Ctoo        = $(WM_SCHEDULER) $(CC) $(c++FLAGS) -c $< -o $@
-cctoo       = $(Ctoo)
-cpptoo      = $(Ctoo)
-cxxtoo      = $(Ctoo)
-
-LINK_LIBS   = $(c++DBUG)
-
-LINKLIBSO   = $(CC) $(c++FLAGS) -shared
-LINKEXE     = $(CC) $(c++FLAGS) -Xlinker --add-needed
-
-#------------------------------------------------------------------------------
diff --git a/wmake/rules/linuxIA64Gcc/c++Debug b/wmake/rules/linuxIA64Gcc/c++Debug
deleted file mode 100644
index 08680a0e4a..0000000000
--- a/wmake/rules/linuxIA64Gcc/c++Debug
+++ /dev/null
@@ -1,2 +0,0 @@
-c++DBUG     = -ggdb3 -DFULLDEBUG
-c++OPT      = -O0 -fdefault-inline
diff --git a/wmake/rules/linuxIA64Gcc/cDebug b/wmake/rules/linuxIA64Gcc/cDebug
deleted file mode 100644
index 72b638f458..0000000000
--- a/wmake/rules/linuxIA64Gcc/cDebug
+++ /dev/null
@@ -1,2 +0,0 @@
-cDBUG       = -ggdb -DFULLDEBUG
-cOPT        = -O1 -fdefault-inline -finline-functions
diff --git a/wmake/rules/linuxIA64Gcc/general b/wmake/rules/linuxIA64Gcc/general
deleted file mode 100644
index 3fbd967720..0000000000
--- a/wmake/rules/linuxIA64Gcc/general
+++ /dev/null
@@ -1,14 +0,0 @@
-CPP        = cpp -traditional-cpp $(GFLAGS)
-
-include $(GENERAL_RULES)/standard
-include $(GENERAL_RULES)/Gcc/openmp
-
-ifneq (,$(findstring ~openmp,$(WM_COMPILE_CONTROL)))
-    include $(GENERAL_RULES)/no-openmp
-endif
-
-include $(DEFAULT_RULES)/X
-include $(DEFAULT_RULES)/c
-include $(DEFAULT_RULES)/c++
-
-#------------------------------------------------------------------------------
diff --git a/wmake/rules/linuxIA64Gcc/mplibHPMPI b/wmake/rules/linuxIA64Gcc/mplibHPMPI
deleted file mode 100644
index 36c64a3719..0000000000
--- a/wmake/rules/linuxIA64Gcc/mplibHPMPI
+++ /dev/null
@@ -1 +0,0 @@
-include $(GENERAL_RULES)/mplib-ia64-HPMPI
diff --git a/wmake/rules/linuxIA64Gcc/mplibMPI b/wmake/rules/linuxIA64Gcc/mplibMPI
deleted file mode 100644
index 186769c0c2..0000000000
--- a/wmake/rules/linuxIA64Gcc/mplibMPI
+++ /dev/null
@@ -1,3 +0,0 @@
-PFLAGS     = -DSGIMPI -DMPI_NO_CPPBIND
-PINC       =
-PLIBS      = -lmpi
diff --git a/wmake/rules/linuxIA64Icc/X b/wmake/rules/linuxIA64Icc/X
deleted file mode 100644
index bed8bfeddf..0000000000
--- a/wmake/rules/linuxIA64Icc/X
+++ /dev/null
@@ -1,3 +0,0 @@
-XFLAGS     =
-XINC       = $(XFLAGS) -I/usr/X11R6/include
-XLIBS      = -L/usr/X11R6/lib -lXext -lX11
diff --git a/wmake/rules/linuxIA64Icc/c b/wmake/rules/linuxIA64Icc/c
deleted file mode 100644
index 8fbd70272d..0000000000
--- a/wmake/rules/linuxIA64Icc/c
+++ /dev/null
@@ -1,21 +0,0 @@
-#------------------------------------------------------------------------------
-include $(GENERAL_RULES)/Icc/c
-
-cARCH      :=
-
-ifneq (,$(WM_COMPILE_OPTION))
-    sinclude $(DEFAULT_RULES)/c$(WM_COMPILE_OPTION)
-endif
-
-cFLAGS      = \
-    $(cARCH) $(GFLAGS) $(cWARN) $(cOPT) $(cDBUG) \
-    $(FOAM_EXTRA_CFLAGS) $(LIB_HEADER_DIRS) -fPIC
-
-ctoo        = $(WM_SCHEDULER) $(cc) $(cFLAGS) -c $< -o $@
-
-LINK_LIBS   = $(cDBUG) -L$(IA32ROOT)/lib
-
-LINKLIBSO   = $(cc) $(cARCH) -i_dynamic
-LINKEXE     = $(cc) $(cARCH) -Xlinker -z -Xlinker nodefs
-
-#------------------------------------------------------------------------------
diff --git a/wmake/rules/linuxIA64Icc/c++ b/wmake/rules/linuxIA64Icc/c++
deleted file mode 100644
index 0117e7dea4..0000000000
--- a/wmake/rules/linuxIA64Icc/c++
+++ /dev/null
@@ -1,24 +0,0 @@
-#------------------------------------------------------------------------------
-include $(GENERAL_RULES)/Icc/c++
-
-c++ARCH    :=
-
-ifneq (,$(WM_COMPILE_OPTION))
-    sinclude $(DEFAULT_RULES)/c++$(WM_COMPILE_OPTION)
-endif
-
-c++FLAGS    = \
-    $(c++ARCH) $(GFLAGS) $(c++WARN) $(c++OPT) $(c++DBUG) $(ptFLAGS) \
-    $(FOAM_EXTRA_CXXFLAGS) $(LIB_HEADER_DIRS) -fPIC
-
-Ctoo        = $(WM_SCHEDULER) $(CC) $(c++FLAGS) -c $< -o $@
-cctoo       = $(Ctoo)
-cpptoo      = $(Ctoo)
-cxxtoo      = $(Ctoo)
-
-LINK_LIBS   = $(c++DBUG) -L$(IA32ROOT)/lib
-
-LINKLIBSO   = $(CC) $(c++FLAGS) -shared
-LINKEXE     = $(CC) $(c++FLAGS)
-
-#------------------------------------------------------------------------------
diff --git a/wmake/rules/linuxIA64Icc/c++Opt b/wmake/rules/linuxIA64Icc/c++Opt
deleted file mode 100644
index 2cb0159273..0000000000
--- a/wmake/rules/linuxIA64Icc/c++Opt
+++ /dev/null
@@ -1,12 +0,0 @@
-c++DBUG     =
-c++OPT      = \
-    -DICC_IA64_PREFETCH \
-    -ansi-alias \
-    -O3 \
-    -fp-speculationsafe \
-    -ftz \
-    -mP3OPT_ecg_swp_control=0x400000 \
-    -fno-alias \
-    -mtune=itanium2 \
-    -fargument-noalias-global \
-    -unroll0
diff --git a/wmake/rules/linuxIA64Icc/c++Prof b/wmake/rules/linuxIA64Icc/c++Prof
deleted file mode 100644
index 9295c12648..0000000000
--- a/wmake/rules/linuxIA64Icc/c++Prof
+++ /dev/null
@@ -1,2 +0,0 @@
-c++DBUG    = -prof_gen
-c++OPT     = -O3
diff --git a/wmake/rules/linuxIA64Icc/general b/wmake/rules/linuxIA64Icc/general
deleted file mode 100644
index b75dd9190a..0000000000
--- a/wmake/rules/linuxIA64Icc/general
+++ /dev/null
@@ -1,15 +0,0 @@
-CPP        = /lib/cpp -traditional-cpp $(GFLAGS) -DICC_IA64_PREFETCH
-GLIBS      =
-
-include $(GENERAL_RULES)/standard
-include $(GENERAL_RULES)/Icc/openmp
-
-ifneq (,$(findstring ~openmp,$(WM_COMPILE_CONTROL)))
-    include $(GENERAL_RULES)/no-openmp
-endif
-
-include $(DEFAULT_RULES)/X
-include $(DEFAULT_RULES)/c
-include $(DEFAULT_RULES)/c++
-
-#------------------------------------------------------------------------------
diff --git a/wmake/rules/linuxIA64Icc/mplibHPMPI b/wmake/rules/linuxIA64Icc/mplibHPMPI
deleted file mode 100644
index 36c64a3719..0000000000
--- a/wmake/rules/linuxIA64Icc/mplibHPMPI
+++ /dev/null
@@ -1 +0,0 @@
-include $(GENERAL_RULES)/mplib-ia64-HPMPI
diff --git a/wmake/rules/linuxIA64Icc/mplibIMPI b/wmake/rules/linuxIA64Icc/mplibIMPI
deleted file mode 100644
index 186769c0c2..0000000000
--- a/wmake/rules/linuxIA64Icc/mplibIMPI
+++ /dev/null
@@ -1,3 +0,0 @@
-PFLAGS     = -DSGIMPI -DMPI_NO_CPPBIND
-PINC       =
-PLIBS      = -lmpi
diff --git a/wmake/rules/linuxIA64Icc/mplibMPI b/wmake/rules/linuxIA64Icc/mplibMPI
deleted file mode 100644
index 186769c0c2..0000000000
--- a/wmake/rules/linuxIA64Icc/mplibMPI
+++ /dev/null
@@ -1,3 +0,0 @@
-PFLAGS     = -DSGIMPI -DMPI_NO_CPPBIND
-PINC       =
-PLIBS      = -lmpi