Template: Infobox Atoll / Maintenance / height Missing
Ujae ( German outdated: Katharine Islands ) is an atoll in the Ralik chain of the Marshall Islands. The atoll has a land area of 1.86 km ², which encloses a lagoon of 186 km ². The atoll is located 630 km northwest of the capital of the Marshall Islands, Majuro.
In 1999 the atoll had 448 inhabitants.