| ULTRA | Underground Legion of Terroristic Research Activists (hacker group) | 恐怖研究活动地下军团（黑客组织） |
| ULTRA | Urban Light Transport | 城市轻型交通 |
| ULTRA | Ultra Low-dose Transdermal Estrogen Replacement Assessment | 超低剂量经皮雌激素替代评估 |
| ULTRA | [not an acronym] WWII codeword for deciphered high-level enemy communications | [不是首字母缩略词]用于破译敌方高层通信的二战码字 |
| ULTRA | Utah League of Tandem Riding Addicts | 犹他州骑马成瘾者联盟 |
| ULTRA | Ultimate List of Talisman Related Articles | 塔利班相关物品最终清单 |