KG, Kg, kG or kg may refer to:

law/legal

• Kammergericht, the Oberlandesgericht (Provincial Appeal Court) in Berlin, Germany
• Kommanditgesellschaft, a German version of a limited partnership

.kg is the Internet country code top-level domain (ccTLD) for Kyrgyzstan. While registrations are normally at the second level, there are some specialized third-level registrations such as those under gov.kg and mil.kg.

The kilogram or kilogramme (SI symbol: kg), also known as the kilo, is the base unit of mass in the International System of Units and is defined as being equal to the mass of the International Prototype Kilogram (IPK), which is almost exactly equal to the mass of one liter of water. The avoirdupois (or international) pound, used in both the Imperial system and U.S. customary units, is defined as exactly , making one kilogram approximately equal to 2.2046 avoirdupois pounds.