Poly(3,4-ethylenedioxythiophene) (PEDOT), an inherently electrically conductive or conjugated polymer (CP), exhibits the potential to play a significant role in the development of innovative fiber materials for use in smart textiles, such as wearables. Furthermore, these fibers can function as artificial muscles in the emerging field of interactive fiber rubber composites. This study introduces a straightforward and efficient method for creating PEDOT-based, biomimetic, fiber-shaped, linearly contracting ionic electroactive polymer actuators. To achieve this, a wet-spinning technique is presented, which enables a continuous production of PEDOT:polystyrene sulfate (PSS) fibers at high production rates of 34 m h-1, an additional fiber washing step and a sulfuric acid posttreatment step to increase the fibers conductivity. The fibers provide a high conductivity of 1028 S cm-1, maximum tensile strength reaching 182 MPa, and a maximum elongation of 24%. When utilized as CP actuators in an aqueous sodium dodecylbenzenesulfonate electrolyte medium, the fibers demonstrate a repeatable maximum isometric contractile force of 1.64 mN and repeatable linear contractile strain up to 0.56%. Furthermore, a high level of cyclic long-term actuation stability can be demonstrated. Notably, these contractile strains are, to the best of knowledge, the highest reported values for pristine PEDOT:PSS fibers.This study introduces a wet-spinning method for high-volume production of poly(3,4-ethylenedioxythiophene):polystyrene sulfate-based conducting polymer fibers, spanning tens to hundreds of meters. Evaluating their physical properties, with emphasis on actuation, reveals robust and stable actuation capabilities, promising for integration into intelligent textiles for wearables or soft robotics with sensing or actuating functionalities.image (c) 2024 WILEY-VCH GmbH