Minecraft wiki entry for Defeating_a_pillager_outpost, associated text: Pillager outposts can be found in any biome that a village can, and usually generate ~300 blocks from a village, though they can spawn anywhere else in the Overworld, such as on a small island in the ocean. It is worth noting that the outpost can be in a different biome than the village. Do not think that an illager patrol means an outpost is nearby.