KR or Kr may refer to:
- South Korea ISO 3166-1 alpha-2 and WMO country code
- .kr, country code top-level domain (ccTLD) of South Korea
- Krypton, a chemical element with symbol Kr
- Kiribati, FIPS 10-4 country code
- Province of Crotone, Italy
- Kanuri language (ISO 639 alpha-2)
- Keewatin Railway
- Comores Aviation IATA airline designator
- Kroger, NYSE stock symbol
- Kayser-Roth
- Khmer Rouge
- KR Reykjavík, an Icelandic football club
- Korean Register of shipping
- Korea Rail Network Authority
- Karis railway station, Finland
- Kelly Ripa (born 1970), an American television personality
- Kenya Railways
- Kings Road in Chelsea, London
- Kamen Rider, a television series
- Knattspyrnufélag Reykjavíkur, an Icelandic football club
- Knight Rider (disambiguation), various media franchises
- Kart Rider, an online game developed by Korean-based Nexon
- Kick Returner, a position in American Football and Canadian Football
- a Harley-Davidson racing motorcycle based on the Model K Sportster
- Knowledge representation
- Krasnodar International Airport IATA airport code
- King's Regulations, a law guiding the conduct and administration of the British Army
- Krone, or Krona, which may refer to several European systems of currency
- Kevin Rudd (born 1957), an Australian politician and former Prime Minister
- Kurt Russell (born 1951), an American actor
- Krishna Raja Wadiyar IV (1884-1940), the former ruler of Mysore
- Krishnarajendra Road, also known as KR Road, Bengaluru
- K.R Market, Bengaluru
- Konkan Railway, a railway line in the Republic of India
- Kind regards, a valediction typically abbreviated in emails
- KiwiRail, a national rail operator in New Zealand
- Grand Duke Constantine Constantinovich of Russia (1858-1915), poet known by his pen name "KR"