Introduction: Use of information system is an index of development in healthcare. An information system captures healthcare data and processes it to create useful information. Nursing leaders are interested in developing computerized records. In Iran, there are some computerized systems for documentation of nursing data; some functions of these systems are: bed management, Lab, X-ray and drug requests, vital signs, nursing report, Caredex and ward management. This research was done with the objective of assessing nursing information systems (NIS) in Iran.Methods: Current computer companies in Iran which have nursing modules (9 companies) were assessed in this cross sectional study in 2010. First, literature was reviewed and a valid and reliable questionnaire was developed. Then experts prioritized NIS needs. Finally, Iran’s NISs were assessed using the identified priorities.Results: Result showed that our NISs comply only 35.7% (95% CI: 29.99-41.41) of the identified priorities. None of the NISs comply nursing classification systems’ needs.85.2% of financial reports’ needs (95% CI: 73.73-96.67) were complied in our NISs.Conclusion: The result showed that NISs in Iran are not very good. Using nursing data coding systems, paying attention to bedside data capturing and active participation of nurses are recommended.