| I-HSPA | Internet HSPA |
| i-land | developed country |
| I-or | Eeyore |
| I-Threes | I Threes |
| I.M. Pei | I. M. Pei |
| IAA | Frankfurt Motor Show |
| IAAF | International Association of Athletics Federations |
| IAEA | International Atomic Energy Agency |
| Iaido | Iaidō |
| Iain Banks | Iain Banks |
| Iaito | Iaitō |
| Iajuddin Ahmed | Iajuddin Ahmed |
| iaktta | note |
| iakttaga | notice |
| iakttagande | observance |
| iakttagare | observer |
| iakttagelse | observation |
| iakttar | watch |
| iakttog | watched |
| Ialomiţa | Ialomiţa County |
| Ian Anderson | Ian Anderson |
| Ian Ashley | Ian Ashley |
| Ian Campbell | Ian Campbell |
| Ian Curtis | Ian Curtis |
| Ian Dury | Ian Dury |
| Ian Fleming | Ian Fleming |
| Ian Gillan | Ian Gillan |
| Ian Haugland | Ian Haugland |
| Ian Hill | Ian Hill |
| Ian Holm | Ian Holm |
| Ian Hunter | Ian Hunter |
| Ian Kershaw | Ian Kershaw |
| Ian Laperriere | Ian Laperriere |
| Ian McDiarmid | Ian McDiarmid |
| Ian McEwan | Ian McEwan |
| Ian McKellen | Ian McKellen |
| Ian Paice | Ian Paice |
| Ian Paisley | Ian Paisley |
| Ian Rush | Ian Rush |
| Ian Smith | Ian Smith |
| Ian Somerhalder | Ian Somerhalder |
| Ian Stewart | Ian Stewart |
| Ian Stuart | Ian Stuart Donaldson |
| Ian Thorpe | Ian Thorpe |
| Ian Woosnam | Sergio García |
| Iannis Xenakis | Iannis Xenakis |
| IANTD | International Association of Nitrox and Technical Divers |
| Iapetos | Iapetus |
| Iatrogen | Iatrogenesis |
| Iaşi | Iaşi |
| IB | IB |
| Ibadi | Ibadi |
| Ibagué | Ibagué |
| Iban Iriondo | Iban Iriondo |
| Iban Mayo | Iban Mayo |
| Ibanez | Ibanez |
| Ibaraki prefektur | Ibaraki Prefecture |
| IBBY | International Board on Books for Young People |
| IBC | International Botanical Congress |
| Iberer | Iberians |
| Iberia | Iberia Airlines |
