POSITION ESTIMATION SYSTEM

A position estimation system provided in a vehicle includes: a front sensor; a peripheral sensor; a position estimation device configured to detect a plurality of feature points of an object from a detection result of at least one of a detection result of the front sensor and a detection result of the peripheral sensor, and estimate a position of the vehicle using the plurality of detected feature points; and a control device configured to control an operation of the vehicle based on an estimation result of the position estimation device. The position estimation device is configured to: weight each of a plurality of pieces of information related to a state of the vehicle and weigh information related to a surrounding environment of the vehicle; and select whether to use a plurality of feature point groups including a part of a plurality of feature points detected by the front sensor and the peripheral sensor for the position estimation for each feature point group based on a result of the weighting. As a result, the position of the own vehicle can be estimated more accurately according to the traveling state and the traveling environment of the own vehicle.