The objective of this paper is to review the use of non-invasive surface measurements to assess craniocervical posture in the sagittal plane and critically review the validity of these measurements. A critical review of the literature that investigates surface methods to measure craniocervical posture was performed. Three studies were discussed that investigated the validity of surface measurements in the sagittal plane using radiographs as a reference criterion. In general, in the studies that investigated craniocervical posture with surface measurements, the authors failed to support their claims with information related to experimental methods such as standardisation of posture, and the reliability, validity and sensitivity of the measurements. Future research that looks at the validation of head and neck posture measurements using surface methods is necessary. Valid standard surface procedures to assess craniocervical posture based on radiographic measurements have not yet been established.