| Abbreviation | Definition |
|---|---|
| JCSCA | Jackson County Sports Complex Authority |
| JCSCA | Jefferson County School Counselor Association |
| JCSD | Jackson County School District |
| JCSD | Johnson County School District |
| JCTA | Jefferson County Teachers Association |
| JCTA | Jefferson County Tennis Association |
| JCTA | Johnson County Trails Association |
| JCW | Johnson County Wastewater |
| JCW | Johnson County Wastewater's |
| JCYP | Jackson County Young Professionals |
| JDCS | Jeff Davis County Schools |
| JFCC | Jewish Fellowship of Chester County |
| JLEFC | Junior League of Eastern Fairfield County (Fairfield, CT) |
| JLGC | Junior League of Galveston County |
| JSFC | Japan Society of Fairfield County |
| JTAC | Join Together Atlantic County |
| KC | Kern County |
| KC | Kings County |
| KCAC | Kendall County Abstract Company |
| KCAC | Kings County Ambulance Commission |