The following are approximate tallies of current listings by county. These counts are based on entries in the National Register Information Database as of April 24, 2008[2] and new weekly listings posted since then on the National Register of Historic Places web site.[3] There are frequent additions to the listings and occasional delistings and the counts here are approximate and not official. New entries are added to the official Register on a weekly basis.[4] Also, the counts in this table exclude boundary increase and decrease listings which modify the area covered by an existing property or district and which carry a separate National Register reference number. The numbers of NRHP listings in each county are documented by tables in each of the individual county list-articles.
Adams County
Barnes County
Benson County
Billings County
Bottineau County
Bowman County
Burke County
Former listing
Burleigh County
Cass County
Cavalier County
Dickey County
Divide County
Dunn County
Former listing
Eddy County
Former listing
Emmons County
Foster County
Former listing
Golden Valley County
Former listings
Grand Forks County
Grant County
Griggs County
Hettinger County
Kidder County
LaMoure County
Former listing
Logan County
McHenry County
McIntosh County
Former listing
McKenzie County
McLean County
Former listings
Mercer County
Former listing
Morton County
Former listing
Mountrail County
Nelson County
Oliver County
Pembina County
Pierce County
Ramsey County
Ransom County
Renville County
Richland County
Rolette County
Sargent County
Sheridan County
Former listing
Sioux County
Sioux County has no current listings on the National Register.
^"National Register of Historic Places: Weekly List Actions". National Park Service. Archived from the original on January 26, 2011. Retrieved January 2, 2009.
^Weekly List Actions, National Register of Historic Places website
^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az baNumbers represent an alphabetical ordering by significant words. Various colorings, defined here, differentiate National Historic Landmarks and historic districts from other NRHP buildings, structures, sites or objects.
^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al amThe eight-digit number below each date is the number assigned to each location in the National Register Information System database, which can be viewed by clicking the number.
^Hiemstra, Damita. National Historic Landmark Nomination/Registration: Lynch Quarry Site. National Park Service, 2008-06, 1.
^"Dunn Center Quarry becomes historic landmark | the Dickinson Press | Dickinson, North Dakota". Archived from the original on June 2, 2013. Retrieved July 29, 2011.
^"Oscar Zero Missile Alert Facility & November-33 Missile Launch Facility". State Historical Society of North Dakota. Archived from the original on August 21, 2008. Retrieved January 17, 2009.
^"N.D. Voters to decide McLean County Courthouse's future".
^Weston, Timothy. "Acculturation in the Middle Missouri Valley as Reflected in Modified Bone Assemblages". Plains Anthropologist 38.142 (1993): 79-100: 80.
^Wood, W. Raymond. "Pottery Types from the Biesterfeldt Site, North Dakota". Plains Anthropologist 3 (1955): 3-12: 3.