Ust-Chorna (Rusyn and Ukrainian: Усть-Чорна; German: Königsfeld; Hungarian: Királymező; Slovak: Usť-Čorna or historically Kraľovo Pole) is a rural settlement in Tiachiv Raion, Zakarpattia Oblast, western Ukraine. The settlement's population was 1,456 as of the 2001 Ukrainian Census. Current population: 1,547 (2022 estimate).