The new listings include the penal colonies where Navalny was held from June 2022 until his death, as well as senior officials from Russia's judicial system, the EU Council said in a statement.
"Today, the Council decided to impose restrictive measures against 33 persons and two entities linked to the sudden death in a strict penal colony of the Russian opposition politician Alexei Navalny," the statement said.
"Both colonies are known for exerting physical and psychological pressure, full isolation, torture and violence on prisoners," it added. "In both places Mr. Navalny suffered abuses, including through repeated solitary confinement in a punishment cell and cruel, inhuman and degrading treatment, leading to the severe deterioration of his health."
Those listed under the sanctions regime are subject to an asset freeze and a travel ban to the EU, according to the statement.
EU foreign policy chief Josep Borrell said: "Alexei Navalny’s slow killing by the Kremlin regime is a stark reminder of its utter disregard for human life. Today’s sanctions demonstrate our determination to hold Russia’s political leadership and authorities to account for the continuing violation of the human rights in Russia."
He added: "At the same time, we know that Putin is not Russia, and Russia is not Putin. We will continue supporting Russia’s civil society and independent voices."
Navalny died at the age of 47 in an Arctic penal colony on February 16, prompting accusations from his supporters that he had been murdered.
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Source: IAR, PAP, Reuters, consilium.europa.eu