diff --git a/.azure-pipelines/windows.sh b/.azure-pipelines/windows.sh
index a1ed841439..d083eda1f9 100644
--- a/.azure-pipelines/windows.sh
+++ b/.azure-pipelines/windows.sh
@@ -28,15 +28,8 @@ echo "GREP_VERSION: $(grep --version)"
 
 GNU_MAKE="$(which make)" # must be done before installing dmc (tampers with PATH)
 
-if [ "$MODEL" == "32omf" ] ; then
-    install_host_dmc
-    CC="$PWD/dm/bin/dmc.exe"
-    CXX="$PWD/dm/bin/dmc.exe"
-    export CPPCMD="$PWD/dm/bin/sppn.exe"
-else
-    CC="cl.exe"
-    CXX="cl.exe"
-fi
+CC="cl.exe"
+CXX="cl.exe"
 
 ################################################################################
 # Install the host compiler
@@ -63,8 +56,9 @@ if [ "$MODEL" == "64" ] ; then
     LIBNAME=phobos64.lib
 elif [ "$MODEL" == "32" ] ; then
     LIBNAME=phobos32mscoff.lib
-else # 32omf
-    LIBNAME=phobos.lib
+else
+    echo 'Invalid $MODEL provided'.
+    exit 1
 fi
 
 ################################################################################
@@ -79,9 +73,6 @@ fi
 
 # avoid the DMC runtime and its limitations for the compiler and {build,run}.d tools themselves
 TOOL_MODEL="$MODEL"
-if [[ "$MODEL" == "32omf" ]]; then
-    TOOL_MODEL=32
-fi
 
 cd "$DMD_DIR"
 "$HOST_DC" -m$TOOL_MODEL compiler/src/build.d -ofgenerated/build.exe
@@ -115,25 +106,6 @@ fi
 
 "$HOST_DC" -m$TOOL_MODEL -g -i run.d
 
-if [ "$MODEL" == "32omf" ] ; then
-    # Pre-build the tools while the host compiler's sc.ini is untampered (see below).
-    ./run tools
-
-    # WORKAROUND: Make Optlink use freshly built Phobos, not the host compiler's.
-    # Optlink apparently prefers LIB in sc.ini (in the same dir as optlink.exe)
-    # over the LIB env variable (and `-conf=` for DMD apparently doesn't prevent
-    # that, and there's apparently no sane way to specify a libdir for Optlink
-    # in the DMD cmdline either).
-    rm "$DMD_DIR/tools/dmd2/windows/bin/sc.ini"
-    # We also need to remove LIB from the freshly built compiler's sc.ini -
-    # not all test invocations use `-conf=`.
-    sed -i 's|^LIB=.*$||g' "$DMD_DIR/generated/windows/release/$TOOL_MODEL/sc.ini"
-    # Okay, now the lib directories are controlled by the LIB env variable.
-    # run.d prepends the dir containing freshly built phobos.lib; we still need
-    # the DMC and Windows libs from the host compiler.
-    export LIB="$DMD_DIR/tools/dmd2/windows/lib"
-fi
-
 targets=("all")
 args=('ARGS=-O -inline -g') # no -release for faster builds
 if [ "$HOST_DMD_VERSION" = "2.079.0" ] ; then
@@ -159,31 +131,25 @@ fi
 cd "$DMD_DIR/druntime"
 "$GNU_MAKE" -j$N MODEL=$MODEL DMD="$DMD_BIN_PATH" CC="$CC" unittest
 
-if [ "$MODEL" != "32omf" ] ; then
-    # run some tests for shared druntime
+# run some tests for shared druntime
 
-    # no separate output for static or shared builds, so clean directories to force rebuild
-    rm -rf test/shared/generated
-    # the test_runner links against libdruntime-ut.dll and runs all unittests
-    #  no matter what module name is passed in, so restrict to src/object.d
-    "$GNU_MAKE" -j$N unittest MODEL=$MODEL SHARED=1 DMD="$DMD_BIN_PATH" CC="$CC" UT_SRCS=src/object.d ADDITIONAL_TESTS=test/shared
-fi
+# no separate output for static or shared builds, so clean directories to force rebuild
+rm -rf test/shared/generated
+# the test_runner links against libdruntime-ut.dll and runs all unittests
+#  no matter what module name is passed in, so restrict to src/object.d
+"$GNU_MAKE" -j$N unittest MODEL=$MODEL SHARED=1 DMD="$DMD_BIN_PATH" CC="$CC" UT_SRCS=src/object.d ADDITIONAL_TESTS=test/shared
 
 ################################################################################
 # Build and run Phobos unittests
 ################################################################################
 
-if [ "$MODEL" = "32omf" ] ; then
-    echo "FIXME: cannot compile 32-bit OMF Phobos unittests ('more than 32767 symbols in object file')"
+cd "$DMD_DIR/../phobos"
+if [ "$MODEL" = "64" ] ; then
+    cp "$DMD_DIR/tools/dmd2/windows/bin64/libcurl.dll" .
 else
-    cd "$DMD_DIR/../phobos"
-    if [ "$MODEL" = "64" ] ; then
-        cp "$DMD_DIR/tools/dmd2/windows/bin64/libcurl.dll" .
-    else
-        cp "$DMD_DIR/tools/dmd2/windows/bin/libcurl.dll" .
-    fi
-    "$GNU_MAKE" -j$N MODEL=$MODEL DMD="$DMD_BIN_PATH" CC="$CC" DMD_DIR="$DMD_DIR" unittest
+    cp "$DMD_DIR/tools/dmd2/windows/bin/libcurl.dll" .
 fi
+"$GNU_MAKE" -j$N MODEL=$MODEL DMD="$DMD_BIN_PATH" CC="$CC" DMD_DIR="$DMD_DIR" unittest
 
 ################################################################################
 # Prepare artifacts
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 7eeaf4f559..50756e8ed0 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -30,9 +30,6 @@ jobs:
         x64:
           MODEL: 64
           ARCH: x64
-        x86-OMF:
-          MODEL: 32omf
-          ARCH: x86
         x86:
           MODEL: 32
           ARCH: x86
@@ -54,11 +51,6 @@ jobs:
         x64:
           MODEL: 64
           ARCH: x64
-
-        # x64 only because 32bit causes weird linker errors for several tests???
-        # x86-OMF:
-        #   MODEL: 32omf
-        #   ARCH: x86
     steps:
       - template: .azure-pipelines/windows.yml
 
diff --git a/changelog/dmd.omf-removed.dd b/changelog/dmd.omf-removed.dd
new file mode 100644
index 0000000000..3835aa03b9
--- /dev/null
+++ b/changelog/dmd.omf-removed.dd
@@ -0,0 +1,5 @@
+Windows OMF support has been removed
+
+After two years of making PE-COFF support the default on Windows, OMF support has now been removed.
+
+This includes the switch (``-m32omf``).
diff --git a/ci/README.md b/ci/README.md
index bc48e4caa3..3c727e82ee 100644
--- a/ci/README.md
+++ b/ci/README.md
@@ -71,13 +71,12 @@ There are currently 49 checks.
 - Azure pipelines (Windows_Coverage x64)
 - Azure pipelines (Windows_DMD_bootstrap x64)
 - Azure pipelines (Windows_DMD_latest x64)
-- Azure pipelines (Windows_DMD_latest x86-OMF)
 - Azure pipelines (Windows_VisualD_LDC x64_Debug)
 - Azure pipelines (Windows_VisualD_LDC x86-mscoff)
 - Azure pipelines (Windows_VisualD_LDC x86-mscoff_MinGW)
 
 Azure pipelines run on Windows platforms, and build DMD, Phobos and Druntime, and run their unittests.
-Windows has three binary formats: 32-bit OMF (deprecated), 32-bit COFF, and 64-bit COFF.
+Windows has two binary formats: 32-bit COFF, and 64-bit COFF.
 
 ### DAutoTest
 
diff --git a/compiler/src/dmd/cli.d b/compiler/src/dmd/cli.d
index 71651d6572..ab7dcfa6e1 100644
--- a/compiler/src/dmd/cli.d
+++ b/compiler/src/dmd/cli.d
@@ -536,12 +536,6 @@ dmd -cov -unittest myprog.d
             "generate 32 bit code and write MS-COFF object files (deprecated use -m32)",
             TargetOS.Windows
         ),
-        Option("m32omf",
-            "(deprecated) generate 32 bit code and write OMF object files",
-            `$(WINDOWS Compile a 32 bit executable. The generated object code is in OMF and is meant to be used with the
-               $(LINK2 http://www.digitalmars.com/download/freecompiler.html, Digital Mars C/C++ compiler)).`,
-            TargetOS.Windows
-        ),
         Option("m64",
             "generate 64 bit code",
             `$(UNIX Compile a 64 bit executable. This is the default for the 64 bit dmd.)
diff --git a/compiler/src/dmd/mars.d b/compiler/src/dmd/mars.d
index 767d16ffc0..aea7536253 100644
--- a/compiler/src/dmd/mars.d
+++ b/compiler/src/dmd/mars.d
@@ -276,7 +276,7 @@ void getenv_setargv(const(char)* envvalue, Strings* args)
 }
 
 /**
- * Parse command line arguments for the last instance of -m32, -m64, -m32mscoff or -m32omfobj
+ * Parse command line arguments for the last instance of -m32, -m64, -m32mscoff
  * to detect the desired architecture.
  *
  * Params:
@@ -285,7 +285,7 @@ void getenv_setargv(const(char)* envvalue, Strings* args)
  *          Should be "32" or "64"
  *
  * Returns:
- *   "32", "64" or "32omf" if the "-m32", "-m64", "-m32omf" flags were passed,
+ *   "32", or "64" if the "-m32", "-m64" flags were passed,
  *   respectively. If they weren't, return `arch`.
  */
 const(char)[] parse_arch_arg(Strings* args, const(char)[] arch)
@@ -296,7 +296,7 @@ const(char)[] parse_arch_arg(Strings* args, const(char)[] arch)
 
         if (arg.length && arg[0] == '-')
         {
-            if (arg[1 .. $] == "m32" || arg[1 .. $] == "m32omf" || arg[1 .. $] == "m64")
+            if (arg[1 .. $] == "m32" || arg[1 .. $] == "m64")
                 arch = arg[2 .. $];
             else if (arg[1 .. $] == "m32mscoff")
                 arch = "32";
@@ -901,11 +901,6 @@ bool parseCommandLine(const ref Strings arguments, const size_t argc, ref Param
             target.isX86_64 = false;
             target.omfobj = false;
         }
-        else if (arg == "-m32omf") // https://dlang.org/dmd.html#switch-m32omfobj
-        {
-            target.isX86_64 = false;
-            target.omfobj = true;
-        }
         else if (startsWith(p + 1, "mscrtlib="))
         {
             driverParams.mscrtlib = arg[10 .. $];