| 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 | 5th (Royal South Middlesex Militia) Battalion, Royal Fusiliers |
| 5th (Royal Westminster Militia) Battalion, Royal Fusiliers | 5th (Scottish) Parachute Battalion | 5th (Scottish) Provisional Battalion (Territorial Force) |
| 5th (Secunderabad) Cavalry Brigade | 5th (Shropshire and Herefordshire) Battalion, The Light Infantry | 5th (Stronsay) Orkney Artillery Volunteer Corps |
