| I wonder | Kamon |
| I'm sorry | przepraszam |
| I-beam | dwuteownik |
| I-RAM | IRAM |
| I. M. Pei | Ieoh Ming Pei |
| IA | Podział terytorialny Stanów Zjednoczonych |
| IAAF Golden League | Golden League |
| IAAF World Championships in Athletics | Mistrzostwa świata w lekkoatletyce |
| IAAF World Cup in Athletics | Puchar świata w lekkoatletyce |
| IAAF World Indoor Championships in Athletics | Halowe mistrzostwa świata w lekkoatletyce |
| IAAF World Junior Championships in Athletics | Mistrzostwa świata juniorów w lekkoatletyce |
| IAAF World Youth Championships in Athletics | Mistrzostwa świata juniorów młodszych w lekkoatletyce |
| IAEA | MAEA |
| IAI Kfir | IAI Kfir |
| IAI Lavi | IAI Lavi |
| IAI Nesher | IAI Nesher |
| Iaidō | Iaidō |
| Iain Banks | Iain Banks |
| Iajuddin Ahmed | Iajuddin Ahmed |
| Iakob Tsurtaveli | Jakub Curtaweli |
| Ialomiţa County | Okręg Ialomiţa |
| Ialomiţa River | Jałomica |
| Ialoveni | Ialoveni |
| Ialysos | Ialyssos |
| Iam | Kosci |
| Iamblichus | Jamblich |
| Iamblichus of Chalcis | Jamblich |
| Ian Anderson | Ian Anderson |
| Ian Brown | Ian Brown |
| Ian Campbell | Ice MC |
| Ian Curtis | Ian Curtis |
| Ian Fleming | Ian Fleming |
| Ian Gillan | Ian Gillan |
| Ian Haugland | Ian Haugland |
| Ian Hill | Ian Hill |
| Ian Holm | Ian Holm |
| Ian McCulloch | Ian McCulloch |
| Ian McDiarmid | Ian McDiarmid |
| Ian McEwan | Ian McEwan |
| Ian McKellen | Ian McKellen |
| Ian Murdock | Ian Murdock |
| Ian Paice | Ian Paice |
| Ian Porterfield | Ian Porterfield |
| Ian Rush | Ian Rush |
| Ian Smith | Ian Smith |
| Ian Somerhalder | Ian Somerhalder |
| Ian Standish Monteith Hamilton | Ian Hamilton |
| Ian Stewart | Ian Stewart |
| Ian Stuart Donaldson | Ian Stuart |
| Ian Thorpe | Ian Thorpe |
| Iannis Xenakis | Janis Ksenakis |
| Iapetus | Japet |
| Iapetus Ocean | Japetus |
| Iarnród Éireann | IE |
| Iasius | Iaso |
| Iaso | Iaso |
| IATA airline designator | Kod linii IATA |
| IATA airport code | Kod lotniska IATA |
| IATA code | Kod lotniska IATA |
| Iatrogenesis | Jatrogenia |
| iatrogenic | jatrogenny |
| Iaudio | IAUDIO |
