diff --git a/openmc/capi/__init__.py b/openmc/capi/__init__.py
index 355304a310..4cea121f71 100644
--- a/openmc/capi/__init__.py
+++ b/openmc/capi/__init__.py
@@ -35,4 +35,5 @@ from .core import *
 from .nuclide import *
 from .material import *
 from .cell import *
+from .filter import *
 from .tally import *
diff --git a/openmc/capi/filter.py b/openmc/capi/filter.py
new file mode 100644
index 0000000000..f671ce4016
--- /dev/null
+++ b/openmc/capi/filter.py
@@ -0,0 +1,15 @@
+from ctypes import c_int, c_int32, c_double, c_char_p, POINTER
+
+from . import _dll
+from .error import _error_handler
+
+
+__all__ = []
+
+# Tally functions
+_dll.openmc_extend_filters.argtypes = [c_int32, POINTER(c_int32), POINTER(c_int32)]
+_dll.openmc_extend_filters.restype = c_int
+_dll.openmc_extend_filters.errcheck = _error_handler
+_dll.openmc_filter_set_type.argtypes = [c_int32, c_char_p]
+_dll.openmc_filter_set_type.restype = c_int
+_dll.openmc_filter_set_type.errcheck = _error_handler
diff --git a/src/api.F90 b/src/api.F90
index f083c7a468..975fb36a93 100644
--- a/src/api.F90
+++ b/src/api.F90
@@ -19,6 +19,7 @@ module openmc_api
   use random_lcg,      only: seed, initialize_prng
   use tally_header
   use tally_filter_header
+  use tally_filter,    only: openmc_filter_set_type
   use simulation,      only: openmc_run
   use string,          only: to_f_string
   use volume_calc,     only: openmc_calculate_volumes
@@ -31,6 +32,7 @@ module openmc_api
   public :: openmc_cell_set_temperature
   public :: openmc_extend_filters
   public :: openmc_extend_tallies
+  public :: openmc_filter_set_type
   public :: openmc_finalize
   public :: openmc_find
   public :: openmc_get_cell
diff --git a/src/error.F90 b/src/error.F90
index 9dec93147c..b7736d0a71 100644
--- a/src/error.F90
+++ b/src/error.F90
@@ -27,6 +27,7 @@ module error
   integer(C_INT), public, bind(C) :: E_TALLY_INVALID_ID = -12
   integer(C_INT), public, bind(C) :: E_INVALID_SIZE = -13
   integer(C_INT), public, bind(C) :: E_CELL_NO_MATERIAL = -14
+  integer(C_INT), public, bind(C) :: E_ALREADY_ALLOCATED = -15
 
   ! Warning codes
   integer(C_INT), public, bind(C) :: W_BELOW_MIN_BOUND = 1
diff --git a/src/tallies/tally_filter.F90 b/src/tallies/tally_filter.F90
index 7c3706dc6b..e5026f95ca 100644
--- a/src/tallies/tally_filter.F90
+++ b/src/tallies/tally_filter.F90
@@ -5,11 +5,12 @@ module tally_filter
   use algorithm,           only: binary_search
   use constants,           only: ONE, NO_BIN_FOUND, FP_PRECISION, ERROR_REAL
   use dict_header,         only: DictIntInt
+  use error
   use geometry_header
   use hdf5_interface
   use particle_header,     only: Particle
   use surface_header
-  use string,              only: to_str
+  use string,              only: to_str, to_f_string
   use tally_filter_header
 
   ! Inherit other filters
@@ -1144,4 +1145,63 @@ contains
     end do
   end subroutine find_offset
 
+!===============================================================================
+!                               C API FUNCTIONS
+!===============================================================================
+
+  function openmc_filter_set_type(index, type) result(err) bind(C)
+    ! Set the type of a filter
+    integer(C_INT32_T), value, intent(in) :: index
+    character(kind=C_CHAR), intent(in) :: type(*)
+    integer(C_INT) :: err
+
+    character(:), allocatable :: type_
+
+    type_ = to_f_string(type)
+
+    err = 0
+    if (index >= 1 .and. index <= n_filters) then
+      if (allocated(filters(index) % obj)) then
+        err = E_ALREADY_ALLOCATED
+      else
+        select case (type_)
+        case ('azimuthal')
+          allocate(AzimuthalFilter :: filters(index) % obj)
+        case ('cell')
+          allocate(CellFilter :: filters(index) % obj)
+        case ('cellborn')
+          allocate(CellbornFilter :: filters(index) % obj)
+        case ('cellfrom')
+          allocate(CellfromFilter :: filters(index) % obj)
+        case ('delayedgroup')
+          allocate(DelayedGroupFilter :: filters(index) % obj)
+        case ('distribcell')
+          allocate(DistribcellFilter :: filters(index) % obj)
+        case ('energy')
+          allocate(EnergyFilter :: filters(index) % obj)
+        case ('energyout')
+          allocate(EnergyoutFilter :: filters(index) % obj)
+        case ('energyfunction')
+          allocate(EnergyFunctionFilter :: filters(index) % obj)
+        case ('material')
+          allocate(MaterialFilter :: filters(index) % obj)
+        case ('mesh')
+          allocate(MeshFilter :: filters(index) % obj)
+        case ('mu')
+          allocate(MuFilter :: filters(index) % obj)
+        case ('polar')
+          allocate(PolarFilter :: filters(index) % obj)
+        case ('surface')
+          allocate(SurfaceFilter :: filters(index) % obj)
+        case ('universe')
+          allocate(UniverseFilter :: filters(index) % obj)
+        case default
+          err = E_UNASSIGNED
+        end select
+      end if
+    else
+      err = E_OUT_OF_BOUNDS
+    end if
+  end function openmc_filter_set_type
+
 end module tally_filter