diff --git a/mlir/include/mlir-c/BuiltinAttributes.h b/mlir/include/mlir-c/BuiltinAttributes.h
--- a/mlir/include/mlir-c/BuiltinAttributes.h
+++ b/mlir/include/mlir-c/BuiltinAttributes.h
@@ -25,6 +25,12 @@
 /// Returns an empty attribute.
 MLIR_CAPI_EXPORTED MlirAttribute mlirAttributeGetNull(void);
 
+//===----------------------------------------------------------------------===//
+// Location attribute.
+//===----------------------------------------------------------------------===//
+
+MLIR_CAPI_EXPORTED bool mlirAttributeIsALocation(MlirAttribute attr);
+
 //===----------------------------------------------------------------------===//
 // Affine map attribute.
 //===----------------------------------------------------------------------===//
diff --git a/mlir/include/mlir-c/IR.h b/mlir/include/mlir-c/IR.h
--- a/mlir/include/mlir-c/IR.h
+++ b/mlir/include/mlir-c/IR.h
@@ -225,6 +225,14 @@
 // Location API.
 //===----------------------------------------------------------------------===//
 
+/// Returns the underlying location attribute of this location.
+MLIR_CAPI_EXPORTED MlirAttribute
+mlirLocationGetAttribute(MlirLocation location);
+
+/// Creates a location from a location attribute.
+MLIR_CAPI_EXPORTED MlirLocation
+mlirLocationFromAttribute(MlirAttribute attribute);
+
 /// Creates an File/Line/Column location owned by the given context.
 MLIR_CAPI_EXPORTED MlirLocation mlirLocationFileLineColGet(
     MlirContext context, MlirStringRef filename, unsigned line, unsigned col);
diff --git a/mlir/lib/CAPI/IR/BuiltinAttributes.cpp b/mlir/lib/CAPI/IR/BuiltinAttributes.cpp
--- a/mlir/lib/CAPI/IR/BuiltinAttributes.cpp
+++ b/mlir/lib/CAPI/IR/BuiltinAttributes.cpp
@@ -20,6 +20,14 @@
 
 MlirAttribute mlirAttributeGetNull() { return {nullptr}; }
 
+//===----------------------------------------------------------------------===//
+// Location attribute.
+//===----------------------------------------------------------------------===//
+
+bool mlirAttributeIsALocation(MlirAttribute attr) {
+  return unwrap(attr).isa<LocationAttr>();
+}
+
 //===----------------------------------------------------------------------===//
 // Affine map attribute.
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/CAPI/IR/IR.cpp b/mlir/lib/CAPI/IR/IR.cpp
--- a/mlir/lib/CAPI/IR/IR.cpp
+++ b/mlir/lib/CAPI/IR/IR.cpp
@@ -145,6 +145,14 @@
 // Location API.
 //===----------------------------------------------------------------------===//
 
+MlirAttribute mlirLocationGetAttribute(MlirLocation location) {
+  return wrap(LocationAttr(unwrap(location)));
+}
+
+MlirLocation mlirLocationFromAttribute(MlirAttribute attribute) {
+  return wrap(Location(unwrap(attribute).cast<LocationAttr>()));
+}
+
 MlirLocation mlirLocationFileLineColGet(MlirContext context,
                                         MlirStringRef filename, unsigned line,
                                         unsigned col) {
diff --git a/mlir/test/CAPI/ir.c b/mlir/test/CAPI/ir.c
--- a/mlir/test/CAPI/ir.c
+++ b/mlir/test/CAPI/ir.c
@@ -1305,6 +1305,11 @@
           1e-6)
     return 23;
 
+  MlirLocation loc = mlirLocationUnknownGet(ctx);
+  MlirAttribute locAttr = mlirLocationGetAttribute(loc);
+  if (!mlirAttributeIsALocation(locAttr))
+    return 24;
+
   return 0;
 }
 
@@ -2159,6 +2164,9 @@
   fprintf(stderr, "@test_diagnostics\n");
   MlirLocation unknownLoc = mlirLocationUnknownGet(ctx);
   mlirEmitError(unknownLoc, "test diagnostics");
+  MlirAttribute unknownAttr = mlirLocationGetAttribute(unknownLoc);
+  MlirLocation unknownClone = mlirLocationFromAttribute(unknownAttr);
+  mlirEmitError(unknownClone, "test clone");
   MlirLocation fileLineColLoc = mlirLocationFileLineColGet(
       ctx, mlirStringRefCreateFromCString("file.c"), 1, 2);
   mlirEmitError(fileLineColLoc, "test diagnostics");
@@ -2181,6 +2189,9 @@
   // CHECK: processing diagnostic (userData: 42) <<
   // CHECK:   test diagnostics
   // CHECK:   loc(unknown)
+  // CHECK: processing diagnostic (userData: 42) <<
+  // CHECK:   test clone
+  // CHECK:   loc(unknown)
   // CHECK: >> end of diagnostic (userData: 42)
   // CHECK: processing diagnostic (userData: 42) <<
   // CHECK:   test diagnostics