| Abbreviation | Definition |
|---|---|
| KMFL | Kinsmen Minor Football League |
| KMGD | Krav Maga Grand Ducal |
| KMNA | Kingston Mixed Netball Association |
| KMSL | Kansas, Missouri Soccer League |
| KMSL | Kettle Moraine Soccer League |
| KMSL | Knoxville Metro Soccer League |
| KNKV | Koninklijke Nederlandse Korbal Verbond (Royal Dutch Korfball Union) |
| KNOT | Kenyir Nature Outdoors Team |
| KNT | Kaze No Takuto |
| KNVB | Koninklijke Nederlandse Voetbal Bond |
| KNZ | Korfball New Zealand |
| KO | Kick Off |
| KO | Kick Out |
| KO | Knock Out |
| KO | knocked out |
| KOCC | Kickball of Crescent City |
| KoF | Knights of Freedom |
| KOH | King Of Hearts |
| KOM | King Of the Mat |
| KOM | King Of the Mountain |