Krasnoilsk (Ukrainian: Красноїльськ; Romanian: Crasna or Crasna-Ilschi) is a rural settlement in Chernivtsi Raion, Chernivtsi Oblast, western Ukraine. It hosts the administration of Krasnoilsk settlement hromada, one of the hromadas of Ukraine. Population: 10,444 (2022 estimate).

Krasnoilsk is located 8 kilometres (5 mi) from the Ukrainian border with Romania and according to the 2001 Ukrainian census, the settlement had 9,122 people [1], out of which almost all are ethnic Romanians. According to the 2001 Ukrainian census, the majority of the population of the urban settlement of Crasna was Romanian -speaking (92.64%), with Ukrainian (5.49%) and Russian (1.45%) speakers in the minority.

Starting in 1968, Krasnoilsk was designated an urban-type settlement.

Until 18 July 2020, Krasnoilsk belonged to Storozhynets Raion. The raion was abolished in July 2020 as part of the administrative reform of Ukraine, which reduced the number of raions of Chernivtsi Oblast to three. The area of Storozhynets Raion was merged into Chernivtsi Raion.

On 26 January 2024, a new law entered into force which abolished the status of urban-type settlement, and Krasnoilsk became a rural settlement.

• Maria Iliuț (born 1955), Moldovan singer of folk music of Romanian ethnicity.

• Krasnoilsk, at the portal of the Verkhovna Rada of Ukraine.
• Malanka (Old New Year Carnival celebration 2010