diff --git a/CMakeLists.txt b/CMakeLists.txt
index c21b44cc1..73d967b3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -367,21 +367,22 @@ set(LIBOPENMC_FORTRAN_SRC
   src/string.F90
   src/summary.F90
   src/surface_header.F90
-  src/tally.F90
-  src/tally_filter.F90
-  src/tally_filter_header.F90
-  src/tally_header.F90
-  src/tally_initialize.F90
   src/timer_header.F90
   src/tracking.F90
   src/track_output.F90
-  src/trigger.F90
-  src/trigger_header.F90
   src/urr_header.F90
   src/vector_header.F90
   src/volume_calc.F90
   src/volume_header.F90
-  src/xml_interface.F90)
+  src/xml_interface.F90
+  src/tallies/tally.F90
+  src/tallies/tally_filter.F90
+  src/tallies/tally_filter_header.F90
+  src/tallies/tally_header.F90
+  src/tallies/tally_initialize.F90
+  src/tallies/trigger.F90
+  src/tallies/trigger_header.F90
+)
 add_library(libopenmc SHARED ${LIBOPENMC_FORTRAN_SRC})
 set_target_properties(libopenmc PROPERTIES OUTPUT_NAME openmc)
 add_executable(${program} src/main.F90)
diff --git a/src/tally.F90 b/src/tallies/tally.F90
similarity index 100%
rename from src/tally.F90
rename to src/tallies/tally.F90
diff --git a/src/tally_filter.F90 b/src/tallies/tally_filter.F90
similarity index 100%
rename from src/tally_filter.F90
rename to src/tallies/tally_filter.F90
diff --git a/src/tally_filter_header.F90 b/src/tallies/tally_filter_header.F90
similarity index 100%
rename from src/tally_filter_header.F90
rename to src/tallies/tally_filter_header.F90
diff --git a/src/tally_header.F90 b/src/tallies/tally_header.F90
similarity index 100%
rename from src/tally_header.F90
rename to src/tallies/tally_header.F90
diff --git a/src/tally_initialize.F90 b/src/tallies/tally_initialize.F90
similarity index 100%
rename from src/tally_initialize.F90
rename to src/tallies/tally_initialize.F90
diff --git a/src/trigger.F90 b/src/tallies/trigger.F90
similarity index 100%
rename from src/trigger.F90
rename to src/tallies/trigger.F90
diff --git a/src/trigger_header.F90 b/src/tallies/trigger_header.F90
similarity index 100%
rename from src/trigger_header.F90
rename to src/tallies/trigger_header.F90