Introduction: Webometrics ranking shows the amount of scientific and educational activities of universities and organizations annually. This study was an attempt to rank medical universities in Iran via three search engines.

  Methods: This applied- descriptive study used webometric methods to survey 43 websites of medical universities in Iran. The three indexes of size, visibility and rich files were taken into consideration by three search engines. Data were analyzed with SPSS 16.

  Results: The results showed that the indexed page size of Tehran University of Medical Sciences enjoyed the highest frequency in the three search engines. Moreover, the lowest ranks belonged to Dezfoul, Jiroft and Yasouj. Concerning foreign links, Tehran University of Medical Sciences gained the rank of 13 and Hormozgan with an average of 23.11 was in the upper ranks, but it was reported to have the rank of 26 regarding indexed page size.

  Conclusion: The findings showed that even the eight high-ranked medical universities did not appear to receive favourable number of links and visitors from other websites. This suggests the low effect of medical universities on the Web in spite of their relatively high page size.