1920* = Minnesota Place Names - 1920 Original** - Brief historic comments on some of these places can be found here.
PO = Record of Appointment of Postmasters, 1832-1971, National Archives

Maps/Landowners in Townships

Linked places in table have separate website pages.
In Township / Notes
Alliance T
Amrum X Elmwood - Post Office Only
Averill V X Spring Prairie
Baker (Navan) V X Alliance
Barnes Glyndon
Barnesville (New Barnesville) C X Barnesville / Photo - Railroad Station
Bethel T Changed to Hawley 1884
Bona X Alliance - Post Office Only
Burbankton Kurtz
Burlington Kurtz
Carleton Moorhead
Comstock V X Holy Cross
Cromwell T
Dale X Highland Grove
Dilworth (Little Italy) V X Moorhead
Douglas R Georgetown
Downer V X Elkton
Eglon T
Elkton T Originally named Garfield and Madison
Elmwood T
Felton T
Felton R X Felton
Finkle R Moorhead 
Flowing T
Georgetown (Old Georgetown, Selkirk) TP X Georgetown
Georgetown T
Glyndon T
Glyndon V X Glyndon
Goose Prairie T
Hagen T
Hawley (Yeovil) C X Hawley/ Photo - Store 1895
Hawley T Originally Bethal Township
Highland Grove T
Hitterdal V X Goose Prairie 
Holy Cross  X Holy Cross
Holy Cross T
Humboldt T
Keene T
Keene X Keene
Kragnes X Kragnes
Kragnes T
Kurtz T / Photo - Farmhouse
La Fayette (Shayenne City) Kragnes
Lambs R Oakport
Little Italy (Dilworth) X Moorhead
Lund X See Tansem
Manitoba Junction Highland Grove
Moland T
Moorhead T
Moorhead C X Moorhead
Morken T
Muskoda R X Hawley 
Naven (Baker) X Alliance
New Barnsville (Barnesville) X Barnesville
Oakport T
Odneland (Ulen) X Georgetown
Old Georgetown (Selkirk, Georgetown) X Georgetown
Onland (Ulen) X Georgetown
Oneland (Ulen) X Georgetown
Parke T Originally named Oak Grove, Park, Parktown
Real X
Riverton T
Rollag  X Parke
Rustad V Kurtz
Ruthruff R Moorhead
Sabin  V X Elmwood
Sarsfield Georgetown
Selkirk (Georgetown, Old Georgetown) X Spring Prairie
Shayenne City (La Fayette) X Kragnes
Sitomanee Kurtz
Skree T
Spring Prairie T
Stockwood X Riverton
Tansem T Originally named Lund
Ulen (Uhlen, Odneland, Onland, Oneland) X Ulen
Ulen T
Willardton X Elmwood
Winnipeg Junction X Highland Grove
Viding T
Witherow Riverton
Wrodahl X Merkon (Post Office Only @ Merkon Farm)
Yeovil (Hawley) X Hawley

*Minnesota Place Names - 1920 Original - Legend From the Publication:
C = City
R = Railway Station
T = Township
TP = Trading Post
V = Village
Clay County excerpt provided by Tim Stowell

An in-depth guide to many Clay County communities can be found here.