| JCO | Joy Community Outreach | Joy社区外展 |
| JCO | Jamaican Caves Organization | 牙买加洞穴组织 |
| JCO | Jet City Orange | Jet City橙色 |
| JCO | Joint Cockpit Office (US DoD) | 联合驾驶舱办公室（美国国防部） |
| JCO | John C. Otto Company, Inc. | John C.Otto公司。 |
| JCO | Juvenile Court Officer | 少年法庭官员 |
| JCO | Comino, Malta | 马耳他科米诺 |
| JCO | Java Connector (SAP) | Java连接器（SAP） |
| JCO | J-Body Club of Ontario | 安大略J-Body俱乐部 |
| JCO | Java CORBA Object (Oracle) | Java CORBA对象（Oracle） |
| JCO | Joyello e la sua Cheesy Orchestra | Joyello e la sua Cheesy管弦乐队 |
| JCO | Joint Cockpit Office | 联合驾驶舱办公室 |
| JCO | Journal on Control and Optimization | 控制与优化杂志 |
| JCO | Journal of Combinatorial Optimization | 组合优化期刊 |
| JCO | Journal of Clinical Orthodontics | 临床正畸杂志 |
| JCO | Journal of Clinical Oncology | 临床肿瘤学杂志 |
| JCO | Judo-Club Obernburg (Germany) | 奥伯恩堡柔道俱乐部（德国） |
| JCO | Joint Construction Office | 联合施工办公室 |
| JCO | Joint Commission Observer | 联合委员会观察员 |
| JCO | Johnson County Orthopedics and Sports Medicine, PA | 宾夕法尼亚州约翰逊县骨科和运动医学 |
| JCO | Juvenile Correctional Officer | 少年惩教主任 |
| JCO | Justification for Continued Operation | 继续运营的理由 |
| JCO | Jim Carrey Online | 吉姆·凯利在线 |
| JCO | James Creek Outfitters | James Creek成套装备 |
| JCO | Junior Commissioned Officer (India) | 初级军官（印度） |
| JCO | Joint Certification Office | 联合认证办公室 |
| JCO | Jamey Cicalese Online | Jamey Cicalese在线 |
| JCO | Joyce Carol Oates | 乔伊斯·卡罗尔·欧茨 |
| JCO | Japanese Commissioners' Office | 日本专员的办公室 |
| JCO | Just Cause Oakland | 只是因为奥克兰 |
| JCO | Johnson County Office (Iowa) | 约翰逊县办事处（爱荷华州） |