| rh. | rehu- (Fodder) |
| rjä | risteilijä (Cruiser) |
| rp.joukot | rannikonpuolustusjoukot (Coastal Defence Forces) |
| R | rajavartiosto (Borderguard) |
| R | ryhmä (Group) |
| R | rykmentti (Regiment) |
| R.It.Ptri | rannikkoilmatorjuntapatteri (Coastal Anti-aircraft Battery) |
| R.K. | rintamakuulustelukortti (Field Interrogation Record) |
| Ra | Raahen suojeluskuntapiiri (Raahe Civil Guard District) |
| Raa.skp. | Raahen suojeluskuntapiiri (Raahe Civil Guard District) |
| Raas.skp. | Raaseporin suojeluskuntapiiri (Raasepori Civil Guard District) |
| Rad.P | radiopataljoona (Radio Battalion) |
| Raiv.Lv. | raivaajalaivue (Minesweeper Squadron) |
| RajaJP | rajajääkäripataljoona (Border Guard Jäger Battalion) |
| RajaK | rajakomppania (Border Guard Company) |
| RajaP | rajapataljoona (Border Battalion) |
| Rak.P | rakennuspataljoona (Construction Battalion) |
| Rask. | raskas (Heavy) |
| Rask.It.Ptri | raskas ilmatorjuntapatteri (Heavy Anti-aircraft Battery) |
| Rask.Psto | raskas patteristo (Heavy Artillery Battalion) |
| Rask.Ptri | raskas patteri (Heavy Battery) |
| Rats.ptri | ratsastava patteri (Mounted Battery) |
| Rats.Ptri | ratsastava patteri (Mounted Battery) |
| RatsPtri | ratsastava patteri (Mounted Battery) |
| RatsuK | ratsukoulu (Riding School) |
| Raut.It.KKJ | rautatieilmatorjuntakonekiväärijoukkue (Railway Anti-aircraft Machinegun Platoon) |
| Raut.It.KKK | rautatieilmatorjuntakonekiväärikomppania (Railway Anti-aircraft Machinegun Company) |
| Raut.It.Ptri | rautatieilmatorjuntapatteri (Railway Anti-aircraft Battery) |
| Raut.Liik.K | rautatieliikennekomppania (Railway Traffice Company) |
| Raut.Ptri | rautatiepatteri (Railway Battery) |
| RaV | raaka-ainevarikko (Raw Material Depot) |
| RAUK | reservialiupseerikoulu (Reserve NCO School) |
| RE | rajavartioston esikunta (Border Guard HQ) |
| Rj.K | rajajääkärikomppania (Border Guard Jäger Company) |
| Rj.P | rajajääkäripataljoona (Border Guard Jäger Battalion) |
| RJR | rannikkojalkaväkirykmentti (Coastal Infantry Regiment) |
| RKorj.J | radankorjausjoukkue (Railway Track Repair Platoon) |
| RKorj.K | radankorjauskomppania (Railway Track Repair Company) |
| RL | Rannikkolaivasto (Coastal Fleet) |
| RL | Rannikkolaivue (Coastal Squadron) |
| Ro.HK | Rovaniemen harjoituskeskus (Rovaniemi Training Center) |
| RP | rannikkopataljoona (Coastal Battalion) |
| RPr. | rannikkoprikaati (Coastal Brigade) |
| RPr.E | ratsuväkiprikaatin esikunta (Cavalry Brigade HQ) |
| RPuh.lenn.J | rautatie puhelin ja lennätinjoukkue (Railway Telephone And Telegraph Platoon) |
| RR | ratsurykmentti (Cavalry Regiment) |
| RR | rannikkoryhmä (Coastal Group) |
| RR | rannikkorykmentti ( Coastal Regiment) |
| Rs | raskas (Heavy) |
| RsPsto | raskas patteristo (Heavy Artillery Battalion) |
| RtPsto | rannikkopatteristo (Coastal Artillery Battalion) |
| RtPtri | rannikkotykistöpatteri (Coastal Artillery Battery) |
| RT | rannikkotykistö (Coastal Artillery) |
| RT | rannikkotykistörykmentti (Coastal Artillery Regiment) |
| RT | Ryhmä Talvela (Group Talvela) |
| RTAK | Rannikkotykistön aliupseerikoulu (Coastal Artillery NCO School) |
| RTG | röntgen (X-ray) |
| RTKK | Rannikkotykistön kapitulanttikoulu (Coastal Artillery Capitulant School) |
| RTR | rannikkotykistörykmentti (Coastal Artillery Regiment) |
| RUK | reserviupseerikoulu (Reserve Officer School) |
| Rv | rajavartiosto (Border Guard) |
| Rv.AUK | ratsuväen aliupseerikoulu (Cavalry NCO School) |
| Rv.AUK | Ratsuväen aliupseerikoulu ( Cavalry NCO School) |
| Rv.Pr. | ratsuväkiprikaati (Cavalry Brigade) |
| Ryn.Tyk.P | rynnäkkötykkipataljoona (Assault Gun Battalion) |
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