| 5J | 5j | 5J (disambiguation) |
| 5J (sculpture) | 5J fleet | 5JJJ |
| 5JO | 5K | 5k |
| 5K (disambiguation) | 5K (resolution) | 5K (road running) |
| 5K (running) | 5K (song) | 5k race |
| 5K race | 5K resolution | 5k resolution |
| 5K road race | 5k run | 5K run |
| 5K run world record progression | 5k86 | 5KA |
| 5KIX | 5KKA | 5km |
| 5km, road | 5kMiles | 5ks |
| 5Ks | 5L | 5l |
| 5L (disambiguation) | 5L40E | 5lbs of Pressure |
| 5LC | 5LCM | 5linesradio |
| 5Linx | 5LINX | 5live |
| 5LN | 5lo | 5LP4134 |
| 5M | 5m | 5M (disambiguation) |
| 5M model | 5M-2500 | 5M0 |
| 5MA | 5martz | 5mastz |
| 5matz | 5MBS | 5me Escadrille de Chasse |
| 5MEO | 5MeO-Dalt | 5meo-dalt |
| 5MEO-DALT | 5MeO-DMT | 5meoamt |
| 5meodalt | 5MEODALT | 5meodmt |
| 5MG | 5MIINUST | 5miinust |
| 5Mile Lake | 5mm | 5mm Bergmann |
| 5mm Bergmann Rimless | 5mm caliber | 5mm Clement |
| 5mm Craig | 5mm Remington Rimfire Magnum | 5mm scale |
| 5mm/35 SMc | 5MMM | 5MT |
| 5MV | 5MW | 5N |
| 5n | 5N (disambiguation) | 5N copper |
| 5n copper | 5N Plus | 5N Plus Inc. |
| 5N-Bicalutamide | 5N-bicalutamide | 5N62 |
| 5N65 radar | 5N7 | 5NAA deaminase |
| 5naf | 5nal Destination | 5Nally |
| 5nally | 5nd Squadron (JASDF) | 5newsonline.com |
| 5NF | 5nizza | 5NIZZA |
| 5nm | 5O | 5o |
| 5O (disambiguation) | 5o Cent | 5O5 (dinghy) |
| 5OKI | 5oki | 5p |
| 5P | 5P (disambiguation) | 5p coin |
| 5p deletion syndrome | 5p minus | 5P Team |
| 5p- | 5p- syndrome | 5P-42 Filin |
| 5PA | 5p− | 5PB |
| 5pb | 5pb. | 5pb. Games |
| 5pb. Records | 5PBA | 5pins |
| 5Plus | 5PM | 5pm |
| 5PNN | 5Pointz | 5Prime |
| 5Q | 5q | 5Q (disambiguation) |
| 5Q minus syndrome | 5q spinal muscular atrophy | 5q- |
| 5Q- syndrome | 5q- syndrome | 5R |
| 5r | 5R (disambiguation) | 5R Fulton Rapid |
| 5R4 | 5R7 | 5RAM |
| 5RC | 5Rebbeccas | 5Rebeccas |
| 5Rhythms | 5rhythms | 5RM |
| 5RN | 5rocks | 5Rocks |
| 5RPH | 5RTI | 5S |
| 5s | 5S (disambiguation) | 5s (iPhone 5s) |
| 5S (methodology) | 5S (music) | 5S Philosophy |
| 5S ribosomal DNA | 5S ribosomal maturation nuclease | 5S ribosomal RNA |
| 5S ribosomal RNA maturation endonuclease | 5S RNA | 5S rRNA |
| 5s-fe | 5S-FE | 5S0 |
| 5S017C4 | 5S2 | 5S4 |
| 5S5 | 5S6 | 5SBSFM |
| 5secondfilms | 5SEF | 5Select |
| 5select | 5sfe | 5SOS |
| 5sos | 5SoS | 5Sos |
| 5soS | 5sOs | 5SOs |
| 5sOS | 5SOS (album) | 5SOS discography |
| 5SOS III Tour | 5SOS5 | 5sos5 |
| 5SOS5 (5 Seconds of Summer album) | 5SOS5 (album) | 5Spike |
| 5SSA | 5sta Family | 5Star |
| 5STAR | 5Star Movement | 5StarMax |
| 5SY | 5T | 5t |
| 5T (disambiguation) | 5T (gang) | 5T4 |
| 5ta estacion | 5ta. Aparición (Mexibús) | 5TA5 |
| 5tar 5ystem | 5Tears Vol. 3 | 5TEARS Vol. 3 ~Sweet Dragon~ |
| 5text | 5th | 5th & Columbia Tower |
| 5th & Market station | 5th & Missouri (St. Louis Metrolink) | 5th & Missouri (St. Louis MetroLink) |
| 5th & Missouri station | 5th (1st Eastern) Lanarkshire Rifle Volunteer Corps | 5th (2nd Northern) Lanarkshire Artillery Volunteer Corps |
| 5th (3rd Leicester Town Rifles) Leicestershire Rifle Volunteer Corps | 5th (Ardgour) Argyllshire Artillery Volunteer Corps | 5th (B.C.) Coast Regiment, RCA |
| 5th (BC) Artillery Regiment Museum | 5th (Berry) Devonshire Mounted Rifle Volunteers | 5th (Blackburn) Lancashire Artillery Volunteer Corps |
| 5th (Blythswood Rifles) Lanarkshire Rifle Volunteer Corps | 5th (Bowling) Yorkshire (West Riding) Artillery Volunteer Corps | 5th (Bradford) Yorkshire West Riding Rifle Volunteer Corps |
| 5th (Bridlington) Yorkshire (East Riding) Rifle Volunteer Corps | 5th (British Columbia) Field Artillery Regiment, RCA | 5th (Builth) Brecknockshire Rifle Volunteer Corps |
| 5th (Castletown) Caithness Artillery Volunteer Corps | 5th (Charmouth) Dorsetshire Artillery Volunteer Corps | 5th (Cinque Ports) Battalion, Royal Sussex Regiment |
| 5th (City of London) Battalion, London Regiment (London Rifle Brigade) | 5th (County Londonderry) Battalion, Ulster Defence Regiment | 5th (Cowie) Kincardineshire Artillery Volunteer Corps |
| 5th (Cullen) Banffshire Artillery Volunteer Corps | 5th (Cyclist) Battalion, East Yorkshire Regiment | 5th (Dundee) Forfarshire Artillery Volunteer Corps |
| 5th (East Grinstead) Sussex Rifle Volunteer Corps | 5th (Exeter) Devonshire Artillery Volunteer Corps | 5th (Flint) Flintshire Rifle Volunteer Corps |
| 5th (Flintshire) Battalion, Royal Welch Fusiliers | 5th (Fraserburgh) Aberdeenshire Artillery Volunteer Corps | 5th (Glasgow Highland) Volunteer Battalion, Highland Light Infantry |
| 5th (Gwersyllt) Denbighshire Rifle Volunteer Corps | 5th (Hackney) Battalion, Royal Berkshire Regiment | 5th (Hampshire and West Somerset) Yeomanry Cyclist Regiment |
| 5th (Harrington) Cumberland Artillery Volunteer Corps | 5th (Highland) Medium Brigade, Royal Garrison Artillery | 5th (Hornsea) Yorkshire (East Riding) Artillery Volunteers |
| 5th (Huntingdonshire) Battalion, Northamptonshire Regiment | 5th (Irish) Volunteer Battalion, King's (Liverpool Regiment) | 5th (Jhelum) Brigade |
| 5th (Kilmarnock) Ayrshire Artillery Volunteer Corps | 5th (Kirkcaldy) Fife Artillery Volunteer Corps | 5th (Laird's Iron Works) Cheshire Artillery Volunteer Corps |
| 5th (Lancashire) Anti-Aircraft Company, Royal Engineers | 5th (Lee Michaels album) | 5th (Liverpool Volunteer Rifle Brigade) Lancashire Rifle Volunteer Corps |
| 5th (Llanberis) Carnarvonshire Rifle Volunteer Corps | 5th (Llanidloes) Montgomeryshire Rifle Volunteer Corps | 5th (London) Corps Signals |
| 5th (Mhow) Cavalry Brigade | 5th (Mhow) Division | 5th (North Irish Horse) Corps Cyclist Battalion |
| 5th (Northampton) Northamptonshire Rifle Volunteer Corps | 5th (Northumberland Fusiliers) Regiment of Foot | 5th (Northumberland) (Fusiliers) Regiment of Foot |
| 5th (or Royal Irish) Regiment of Dragoons | 5th (Par) Cornwall Artillery Volunteer Corps | 5th (Perthshire Highland) Volunteer Battalion, Black Watch (Royal Highlanders) |
| 5th (Prince of Wales's) Battalion, Devonshire Regiment | 5th (Princess Charlotte of Wales's) Dragoon Guards | 5th (Princess Charlotte of Wales’s) Dragoon Guards |
| 5th (Pwllheli) Carnarvonshire Rifle Volunteer Corps | 5th (Queen's Edinburgh Rifles) Battalion, Royal Scots | 5th (Rainton) Durham Artillery Volunteer Corps |
| 5th (Reserve) Battalion, Middlesex Regiment | 5th (Reserve) Battalion, Royal Fusiliers | 5th (Reserve) Battalion, The Northumberland Fusiliers |
| 5th (Reserve) Battalion, Worcestershire Regiment | 5th (Royal Elthorne Militia) Battalion, Middlesex Regiment | 5th (Royal Irish) Lancers |
