| San Diego Jhikli Ambwari | India Standard Time | -11:30 |
| San Diego Jessup | Eastern Time | -01:00 |
| San Diego Jesus Maria | Peru Time | -01:00 |
| San Diego Jette | Central European Time | -07:00 |
| San Diego Jettingen-Scheppach | Central European Time | -07:00 |
| San Diego Jindalee | Eastern Australia Time | -16:00 |
| San Diego Jindivick | Eastern Australia Time | -17:00 |
| San Diego Jim Thorpe | Eastern Time | -01:00 |
| San Diego Jinan | China Time | -14:00 |
| San Diego Ironton | Eastern Time | -01:00 |
| San Diego Iruma | Japan Time | -15:00 |
| San Diego Ireland | United Kingdom Time | -06:00 |
| San Diego Ipswich | Eastern Time | -01:00 |
| San Diego Iowa Park | Central Time | 00:00 |
| San Diego Iphofen | Central European Time | -07:00 |
| San Diego Inzell | Central European Time | -07:00 |
| San Diego Inverurie | United Kingdom Time | -06:00 |
| San Diego Inverleigh | Eastern Australia Time | -17:00 |
| San Diego Innaloo | Western Australia Time | -14:00 |
| San Diego Intra | Central European Time | -07:00 |
| San Diego Ingersoll | Eastern Time | -01:00 |
| San Diego Ingleburn | Eastern Australia Time | -17:00 |
| San Diego Inez | Eastern Time | -01:00 |
| San Diego Inishmore | Ireland Time | -06:00 |
| San Diego Indapur | India Standard Time | -11:30 |
| San Diego Indiana | Eastern Time | -01:00 |
| San Diego Indialantic | Eastern Time | -01:00 |
| San Diego Indian Harbour Beach | Eastern Time | -01:00 |
| San Diego Indian Rocks Beach | Eastern Time | -01:00 |
| San Diego Imboden | Central Time | 00:00 |
| San Diego Immenstadt | Central European Time | -07:00 |
| San Diego Incline Village | Pacific Time | 02:00 |
| San Diego Inala | Eastern Australia Time | -16:00 |
| San Diego Inari | Eastern European Time | -08:00 |
| San Diego Ischgl | Central European Time | -07:00 |
| San Diego Irvine | Pacific Time | 02:00 |
| San Diego Irvine | United Kingdom Time | -06:00 |
| San Diego Irving | Central Time | 00:00 |
| San Diego Ishikawa | Japan Time | -15:00 |
| San Diego Issigeac | Central European Time | -07:00 |
| San Diego Islington | Eastern Australia Time | -17:00 |
| San Diego Islamorada | Eastern Time | -01:00 |
| San Diego Islamabad | Pakistan Time | -11:00 |
| San Diego Islandia | Eastern Time | -01:00 |
| San Diego Isle | Central Time | 00:00 |
| San Diego Isla Canela | Central European Time | -07:00 |
| San Diego Isla Mujeres | Eastern Time | -01:00 |
| San Diego Itabashi | Japan Time | -15:00 |
| San Diego Itatiaia | Brasilia Time | -03:00 |
| San Diego Itaunja | India Standard Time | -11:30 |