Abstract Background and Objectives Oral health of older adults in nursing homes is poor, which can negatively affect general health and well-being. Most oral health problems are preventable with good oral hygiene and regular dental check-ups. Caregivers can help improve residents’ oral health through regular oral health assessments. The interRAI instrument used in Long-Term Care Facilities (LTCF) to evaluate older adults’ health and well-being, has the potential to integrate oral care into general care planning. The recently optimized Oral Health Section for inclusion in the interRAI instruments (OHS-interRAI) enables non-dental caregivers to identify residents requiring help with oral hygiene and/or a dental referral. This study reports the first data obtained using the OHS-interRAI, describing the oral health situation of older adults in Flemish and Dutch nursing homes. Research Design and Methods In this cross-sectional study, interRAI LTCF data, including OHS-interRAI data, were collected from October 2020 to January 2023 and analyzed from 417 and 795 persons aged 65 years or older in Flemish and Dutch nursing homes, respectively. Results Most common oral health problems were poor oral hygiene and compromised teeth. Differences in oral health were found between Flemish and Dutch residents. Flemish residents had significantly more problems with chewing, dry mouth, oral and denture hygiene, and tongue condition than their Dutch counterparts. They also had a higher need for help with oral hygiene (19.4% vs. 14.0%) and a dental referral (36.8% vs. 20.9%). Older adults in Flemish nursing homes (20.3%) had significantly fewer dental check-ups than those in Dutch nursing homes (73.5%). Discussion and Implications The use of the OHS-interRAI by non-dental caregivers identified at least one-third of the residents requiring help with oral hygiene and/or a dental referral. By means of trigger algorithms (Collaborative Action Points), the OHS-interRAI enables the integration of oral care into general care planning.