Nishi-Maizuru Station is an aboveground station with one island platform and one single platform serving three tracks used by JR; in addition, a part of the opposite side of the single platform, which serves trains for Ayabe Station, has been cut away to create a single platform serving one track for the KTR Miyazu Line.
プラットホーム形状と配置2面3線のJRプラットホームに加え、その単式ホーム反対側の綾部寄りを切り欠いた1面1線のKTR宮津線ホームを有する地上駅。