This chapter examines Russian officials’ debates and policies regarding Koreans in the Maritime Province from 1880 to the 1920s. It sees these policies as part of a broader project to revise the practice of plural jurisdiction, in which the empire ruled its vast territories and peoples through a flexible legal regime. Amidst a growing wave of nativist sentiment, officials aimed to standardize the privileges respectively held by subjects and foreigners and to institutionalize borders. In the Russian Far East, suspicions about the interference of the Korean, Chinese, and Japanese governments led officials to categorize the resident Korean population as subjects and aliens, experiment with policies to ban the settlement of Koreans in the border region, institute border and passport laws, and discuss the benefits and dangers of continued Asian migration to Russia. The chapter further explores how Koreans subverted these laws and policies to their own ends.