| Fleet Type | Number in Service | Body | Engine | Chassis |
| A (Ex-DUTC) (1934-1953) | 46 | DUTC | AEC 6.7 litre | AEC Regal 4 |
| A (Ex-GNR) (1948-1972) | 30 | Park Royal | AEC 9.6 litre | AEC Regal III |
| A (1978-1995) | 6 | Ford Transit 14-Seater | Ford | Ford Transit Minibus |
| AA (1961-1977) | 3 | CIÉ | AEC 9.6 litre | AEC Regent V |
| AD (1993) | 70 | Alexander Setanta | DAF LT1160G | DAF SB220 |
| AP (1930-1947) | 3 | GSR | AEC 6.1 litre (Petrol) | AEC Regal I Model 662 |
| AR1 (1946-1962) | 1 | CIÉ | AEC 7.7 litre | AEC Regent II |
| AR 2-11 (1947-1962) | 10 | CIÉ | AEC 9.6 litre | AEC Regent III |
| Ex-GNR AR (1946-1970) | 31 | PRV / GNR | AEC 9.6 litre | AEC Regent III |
| AU (1954-1972) | 33 | GNR / PRV | AEC 9.6 litre | AEC Regal IV |
| AV (2000 – 2004) | 448 (AV1-448) | Alexander / Transbus ALX400 | Volvo D7C-215 | Volvo B7LDD |
| AX (2006) | 200 (AX449-648) | Alexander / Transbus ALX400 | Volvo D7C-215 | Volvo B7LDD MK2 |
| AW (2001) | 20 | Wright Eclipse Fusion | Volvo D7C-290 | Volvo B7LA |
| BA (1990-2001) | 21 | Alexander ‘X’ Type (Built 1974-1977) | Bedford 500 | Bedford YRQ |
| BG (1991-2001) | 46 | Alexander ‘X’ Type (Built 1975-1978) | Gardner 6HLXB | Bristol RELL6G |
| BM (1988-2001) | 105 | Marshall Campaigner (Built 1978-1981) | Bedford 330 | Bedford SB5 |
| BP (1949-1960) | 6 | Griffith J.Roberts | Bedford 3.5 litre | Bedford OB |
| C (1965-1996) | 270 (190 short) (80 Long) | CIÉ / MSL | Leyland O.600 / O.680 (Semi Automatic) | Leyland Leopard PSU3/4R (Short 30′) PSU4/4R (Long 36′) |
| CVH / CVS (1986) | 35 | Van Hool Acron Hi-Line | Cummins L10-290 | Van Hool (Integral) |
| D / DF (1966-1995) | 602 | CIÉ / MSL / Van Hool McArdle | Leyland O.600 / O.680 (D) or DAF 1160 (DF) | Leyland Atlantean PDR1 |
| D / DF (1974-1995) | 238 | Van Hool McArdle | Leyland O.680 (D) or DAF 1160 (DF) | Leyland Atlantean AN68 |
| DA (1993) | 10 | Alexander Setanta | DAF LT160G | DAF SB220 |
| DD (2002) | 23 | ELC Vyking | Volvo | Volvo B7TL |
| DDD (2000-2001) | 1 | Plaxton | Dennis | Dennis Trident |
| DL (1992-2001) | 4 | Leyland Tiger | Leyland TL 11 | Duple Laser |
| DP (1999-2002) 3-year lease | 10 | Plaxton SPD | Cummins B5.9 180 | Dennis Dart |
| DPC (2000) | 32 | Plaxton Pointer | Cummins B5.9 180 | Dennis Dart |
| DPC 101 – 110 (2002) | 10 | Plaxton Pointer | Cummins B5.9 180 | Dennis Dart |
| DPL (2000-2001) Short Lease | 23 | Plaxton Pointer / Wrightbus / ELC | Cummins B5.9 | Dennis Dart |
| DR (1946-1955) | 6 | CIÉ (Bodies later used on R575-580) | Daimler 8.26 litre | Daimler CWD6 |
| DT (2003) | 10 | TransBus (Alexander) ALX400 | Cummins | Dennis Trident |
| DVH (DOIG) (1978 – 1980) | 26 | Bedford YMT (Ex-DOIG Coaches) | Bedford | Van Hool |
| DVH (New) (1993) | 20 | Van Hool Alizee | DAF LT195 | DAF MB230 |
| DWM (2000) | 15 | Wright Cadet | DAF | DAF SB120 |
| DWR (2001) | 20 | Wright Cadet | DAF | DAF SB120 |
| E / SE (1961-2001) | 170 | CIÉ | Leyland O.600 | Leyland Leopard L2 |
| ET (1963-1970) | 13 | Ogle / CIÉ (Later rebodied as LVH 34-46) | Leyland O.600 | Leyland Leopard PSU3/4R |
| EV (2007-2009) | 100 | Alexander Dennis Enviro 400 | Volvo B9B260 | Volvo B9TL |
| EVH / EVS (1986) | 15 | Van Hool Alizee T815 | Cummins L10-290 | Van Hool (Integral) |
| FS (1995) | 3 | Fiat Ducato / Par-Fit (Conversion) | Fiat | Fiat Ducato Minibus |
| G (1937-1964) | 55 | GNR / PRV | Gardner 7-litre | GNR Gardner |
| GT (2012-2013) | 160 | Wright Eclipse Gemini | Volvo B9B260 | Volvo B9TL |
| HB (C203 / 254 & SS 65) | 3 | CIÉ / MSL | Leyland O.680 / Bedford 330 | Leyland Leopard / Bedford SB5 |
| KC (1983-2000) | 202 | GAC (Integral) | Cummins L10-185 | Chassisless (Integral) |
| KCS (2000-2005) | 70 (Schools) (Converted KC) Built 1983-1985 | GAC (Integral) | Cummins L10-185 | Chassisless (Integral) |
| KD (1981-2001) | 366 | Bombardier (Integral) | Detroit Diesel 6V-71 | Chassisless (Integral) |
| KE (1981-1997) | 52 | Bombardier (Integral) | Detroit Diesel 6V-71 | Chassisless (Integral) |
| KR / KS (1985) | 226 | GAC | DAF DT615 | GAC ‘KR’ Type Chassis |
| KS 1 (1982) | 1 | FFG | Cummins B-Series 5.9 litre | FFG ‘KS’ Prototype Chassis |
| KW 1 (1981-1984) | 1 | FFG | Mercedes 3.0 litre | Mercedes Telebus |
| LA (1990-2001) | 38 | Alexander ‘X’ Type (Built 1975-1977) | Leyland O. 680 | Leyland Leopard PSU/5 |
| LS (2001) | 178+ (10/04 | Leyland (Built 1988-1992) | Cummins | Leyland Lynx |
| LVH (1970-1994) | LVH 24 – 33 (Brand New) | Van Hool McArdle | Leyland O.680 | Leyland Leopard PSU3 |
| LVH34 – 46 (Were ET’s) | ||||
| LVH 47 (Ex- PL6) | ||||
| M (1971-2001) | 213 | CIÉ / MSL | Leyland O.680 (M) (Also see MC, MD and MG) | Leyland Leopard PSU5 |
| MA (1993-2002) | 20 | Alexander (Belfast) | Mercedes OM364 | Mercedes 709D |
| MB (1987-1994) | 15 | Metro-Cammell Weymann | Cummins | MCW Metrorider |
| MC (2000) | 20 | Citaro | Mercedes | Mercedes Citybus |
| MC 90 / 167 (Cummins engined M) | 2 | CIÉ / MSL | Cummins NHH-250 | Leyland Leopard PSU5 |
| MD * (Originally built as an M in 1971-72) | N/A | CIÉ / MSL | DAF 1160 (MD) (Conversion) | Leyland Leopard PSU5 |
| ME (1993-2003) | 69 | Eurocoach (Donegal) | Mercedes OM364 | Mercedes 709 / 811D |
| MG ** (1971-2001) | N/A | CIÉ / MSL | Detroit Diesel 6-71 (Conversion) | Leyland Leopard PSU5 |
| MH (1999) | 33 | Hispano Vita | Mercedes OM442LA | Mercedes 0404 |
| ML (1994) | 45 | Leicester Coachworks | Mercedes OM364 | Mercedes 709 / 811D |
| MV (1998) | 25 | Eurocoach (Donegal) | Mercedes OM904LA | Mercedes O.814 Vario |
| MW (1990-2001) | 10 | Wrights | Mercedes OM364 | Mercedes 709 / 811D |
| N (1934-1954) | 93 | DUTC | Leyland 5.7 litre (Diesel) | Lion LT4, LT5A & LT7 |
| NP (1935-1954) | 91 | GSR | Leyland 5.1litre (Petrol) | LT4, LT5A, LT6, LT7 and LT9 |
| OP (2004) | TBC | Optare Excel L1150 | Mercedes OM906 | Integral (Chassisless) |
| P (Tiger) (1948-1972) | 361 | CIÉ Spa Road | Leyland O.600 | Leyland Tiger OPS3 / PS2/14 |
| P (1993-2003) | 40 (All on school services) | Plaxton – Verde | DAF LT160G | DAF SB220 |
| PA (DB) (2021-2023) | 280 | ADL Enviro400ER | Cummins B4.5 (diesel) BAE DTM100 (electric) | Integral (Chassisless) |
| PAD (BE) (2021-2023) | ADL Enviro400ER | Cummins B4.5 (diesel) BAE DTM100 (electric) | Integral (Chassisless) | |
| PD / PDS (1990) | 60 | Plaxton Paramount 3500 III | DAF LT210 | DAF MB230 |
| PL : 1-10 (1969-1987) | 10 | Panorama II 49 seater | Leyland O. 600 | Leyland Leopard PSU/3 |
| PL : 11-40 (1969-1987) | 30 | Plaxton Panorama Elite | Leyland O. 600 | Leyland Leopard PSU/3 |
| PL : 51-53 (1990) | 3 | Plaxton Paramount 3500 (Built 1984) | Cummins L10 | Leyland Tiger |
| PL : 61-124 (1991) | 64 | Plaxton 3500 III (PL61-66) Plaxton 3200 III (PL67-124) | Cummins L10 | Leyland Tiger |
| R1-R242 (1937-1960) | 242 | DUTC | Leyland 8.6 litre | Leyland Titan TD4, TD5 and TD7 |
| R243-246 (1944-1959) | 4 | DUTC | Leyland 8.6 litre | Leyland Tiger TS11 |
| R247-250 (Ex-GSR) (1936-1958) | 4 | GSR | Leyland 8.6 litre | Leyland Titan TD4 |
| R251-260 (Ex-GSR) (1940-1960) | 10 | GSR | Leyland 8.6 litre | Leyland Titan TD7 |
| R261-280 (1946-1965) | 20 | CIÉ | Leyland 8.6 litre | Leyland Titan OPD1 |
| R281-290 (1948-1968) | 10 | CIÉ | Leyland O.600 | Leyland Titan OPD2 |
| R291-390 (1948-1971) | 100 | Leyland (Bolton’s) | Leyland O.600 | Leyland Titan PD2/1 & PD2/3 |
| R391-440 (1948-1971) | 50 | Leyland (Capetowns) | Leyland O.600 | Leyland Titan PD2/1 & PD2/3 |
| R441-R540 (1948-1973) | 100 | CIÉ | Leyland O.600 | Leyland Titan OPD2 |
| R541-R546 (1953-1974) | 6 | CIE | Leyland O.600 | Leyland Titan OPD2 |
| R547-R574 (1954-1974) | 28 | CIÉ | Leyland O.600 | Leyland Titan OPD2 |
| R575-580 (1954-1971) | 6 | CIÉ (Bodies off DR 1-6) | Leyland O.600 | Leyland Titan OPD2 |
| R581-R833 (1955-1976) | 253 | CIÉ | Leyland O.600 | Leyland Titan OPD2 |
| R901-R926 (Specials) (1964-1981) | 26 | Park Royal | Leyland O.600 | Leyland Titan PD3/A Special |
| RA (1959-1982) | 152 | CIÉ | Leyland O.600 (Semi Automatic) | Leyland Titan PD3/2 |
| RA (1994) | 148 | Alexander RH | Cummins L10-215 | Volvo Olympian |
| RH (1990) | 175 | Alexander ‘RH’ | Cummins L10-185 | Leyland Olympian |
| RP (1931-1950) | 20 | Leyland / GSR | Leyland Petrol | Leyland TD1, 2, 3 |
| RV (1997) | 315 | Alexander ‘RH’ | Volvo D10A-245 | Volvo Olympian |
| SC (2001) | 71+ (10/04) | Irizar Century | Scania DSC 915 | Scania |
| SF (1968-1985) | 145 | Ford Transit Minibus | Ford | Ford Transit |
| SG (2014-2021) | 621 | Wright Gemini 3 | Volvo D5K240 | Volvo B5TL |
| SI (1998-2004) (Leased) | 81 | Irizar Century | Scania DSC 915 | Scania DSC 915 |
| SM (1969-1972) | 2 | Mercedes Minibus | Mercedes | Mercedes 0319D |
| SR (2001) | 52 | Irizar Rural | Scania DSC 915 | Scania L941B |
| SS (1967-2001) | 770 | CIÉ Spa Road / Murphy / Duffy-McArdle Van Hool-McArdle | Bedford 330 | Bedford SB5 / VAS5 |
| SS (1977-2001) | 30 | Van Hool McArdle | Bedford 330 | Bedford SB5 |
| T (1934-1962) | 23 | GSR / DUTC / CIÉ | Leyland 8.6 | Leyland Tiger TS11 |
| TE / TES (1988) | 40 | Alexander ‘TE’ | Cummins L10-250 | Leyland Tiger |
| U (Coach) (1954-1973) | 50 | CIÉ | Leyland O.600 | Leyland Royal Tiger |
| U (Bus) (1954-1973) | 38 | CIÉ | Leyland O.600 | Leyland Royal Tiger |
| U (Ex-GNR) (1952-1973) | 4 | Saunders-Roe | Leyland O.600 | Leyland Royal Tiger PSU1/9 |
| VA (1996) | 10 | Alexander Setanta | Volvo THD-103 | Volvo B10B |
| VC (1994) | 147 | Caetano Algarve II | Volvo DH10A-285 | Volvo B10M |
| VC 201-215 (2001-2004) (Leased) | 15 | Caetano Enigma | Volvo DH10A-285 | Volvo B10M |
| VC 301-330 (2003) | 30 | Caetano Enigma | TBC | TBC |
| VG (2004) | 30 | Sunsundegui Sideral | Volvo DH10A-215 | Volvo B12M |
| VG (DB) (2008-2009) | 50 | Wright Eclipse Gemini | Volvo B9B260 | Volvo B9TL |
| VL (1998) | 6 | Alexander Ultra | Volvo DH10A-285 | Volvo B10L |
| VNC (1993) | 1 | Northern Counties Paladin | Volvo | Volvo B10B |
| VP | VP 1 – 114 (114) Leased (1995 – 2005) | Plaxton Excalibur (With exception of VP 340 which is a Plaxton Paragon) | Volvo DH10A-285 | Volvo B10M |
| VP 301 – 347 (47) Purchased (2000) | ||||
| VR (2000) | 55 | Plaxton Prima | Volvo | Volvo B7R |
| VS (1994-2004) | 331 (All w/d by 09/04) | New Zealand Motor Bodies (Built 1981-1984) | Volvo B7 Turbo | Volvo B57 |
| VT (2005-2007) | VT 1-20 | Alexander Dennis Enviro 500 | Volvo D9A300 (Euro 3) | Volvo B9TL |
| VT 21-70 | Alexander Dennis Enviro 500 | Volvo D9B310 (Euro 4) | Volvo B9TL | |
| VW (1997) | 9 | Wright Endurance | Volvo DH10A-245 | Volvo B10M |
| VWL : 1-11 (1999) | 11 | Wrightbus Crusader | Volvo DH10A-245 | Volvo B6BL |
| VWL:101-119 (2000) | 19 | Wright Liberator | Volvo DH10A-245 | Volvo B10BLE |
| VWL120-144 (2001) | 25 | Wright Fusion | Volvo DH10A-245 | Volvo B7L |
| VWM (2000) | 10 | Wrightbus Crusader | Volvo DH10A-245 | Volvo B6BLE |
| W (1994-1995) | 5 | CVE – Omni (City Vehicle Engineering) | Mazda | Styer of Austria (Integral) |
| WT (1963-1970) | 23 | Ogle / CIE / MSL (Later rebodied as WVH 1-23) | Leyland O.600 | Leyland Worldmaster ERT2/1 |
| WV (1999) | 52 | Wright Crusader 2 | Volvo D6A | Volvo B6BLE |
| WVH *** (1970-1999) | 23 | Van Hool (Belgium) (Formerly WT1-23) | Leyland O.600 | Leyland Worldmaster ERT2/1 |
