| International (models:177) | Isuzu (models:144) | Iveco (models:127) | International Harvester (models:48) |
| Imperial (models:30) | Infiniti (models:29) | Ikarus (models:18) | IKARBUS (models:14) |
| Izh (models:12) | IFA (models:9) | Iran Khodro (models:7) | Ingersoll-Rand (models:6) |
| IMT (models:5) | Invicta (models:5) | ISO (models:4) | Irmscher (models:4) |
| IC Corporation (models:3) | IPV (models:3) | ING RENAULT F1 TEAM (models:3) | Innocenti (models:3) |
| Irizar (models:2) | Indiana (models:2) | Irisbus (models:2) | Intrall (models:2) |
| Italdesign (models:2) | Iso (models:2) | Isotta Fraschini (models:2) | Ikarbus (models:1) |
| IVECO (models:1) | IR Club Car (models:1) | Instep (models:1) | IMZA (models:1) |
| IZh (models:1) | Intermeccanica (models:1) | Issigoni (models:1) | IKARBUS (models:1) |
| IAME (models:1) | IR ABG (models:1) | INFINITI (models:1) | Irving Napier (models:1) |
| Iso (models:1) | Inaltera (models:1) | IHC (models:1) | Invalid Carriage (models:1) |
| IMV (models:1) | Ika (models:1) | ISUZU (models:1) | Instone (models:1) |