<Table> <Tr> <Th colspan="2"> Season </Th> <Th colspan="2"> Episodes </Th> <Th colspan="2"> Originally aired </Th> <Th colspan="4"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Viewers ( millions ) </Th> <Th> Viewers rank </Th> <Th> 18 -- 49 rating / share </Th> <Th> 18 - 49 rank </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> October 23 , 2011 ( 2011 - 10 - 23 ) </Td> <Td> May 13 , 2012 ( 2012 - 05 - 13 ) </Td> <Td> 11.71 </Td> <Td> 28 </Td> <Td> 4.1 / 10 </Td> <Td> 18 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 30 , 2012 ( 2012 - 09 - 30 ) </Td> <Td> May 12 , 2013 ( 2013 - 05 - 12 ) </Td> <Td> 10.24 </Td> <Td> 35 </Td> <Td> 3.6 / 9 </Td> <Td> 18 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 29 , 2013 ( 2013 - 09 - 29 ) </Td> <Td> May 11 , 2014 ( 2014 - 05 - 11 ) </Td> <Td> 9.38 </Td> <Td> 35 </Td> <Td> 3.3 / 8 </Td> <Td> 12 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 28 , 2014 ( 2014 - 09 - 28 ) </Td> <Td> May 10 , 2015 ( 2015 - 05 - 10 ) </Td> <Td> 8.98 </Td> <Td> 50 </Td> <Td> 3.2 / 7 </Td> <Td> 17 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 27 , 2015 ( 2015 - 09 - 27 ) </Td> <Td> May 15 , 2016 ( 2016 - 05 - 15 ) </Td> <Td> 6.32 </Td> <Td> 69 </Td> <Td> 2.2 / 7 </Td> <Td> 34 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 25 , 2016 ( 2016 - 09 - 25 ) </Td> <Td> May 14 , 2017 ( 2017 - 05 - 14 ) </Td> <Td> 4.39 </Td> <Td> 105 </Td> <Td> 1.5 / 5 </Td> <Td> 70 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> October 6 , 2017 ( 2017 - 10 - 06 ) </Td> <Td> May 18 , 2018 ( 2018 - 05 - 18 ) </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table>
<Table> <Tr> <Th colspan="2"> Season </Th> <Th colspan="2"> Episodes </Th> <Th colspan="2"> Originally aired </Th> <Th colspan="4"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Viewers ( millions ) </Th> <Th> Viewers rank </Th> <Th> 18 -- 49 rating / share </Th> <Th> 18 - 49 rank </Th> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> October 23 , 2011 ( 2011 - 10 - 23 ) </Td> <Td> May 13 , 2012 ( 2012 - 05 - 13 ) </Td> <Td> 11.71 </Td> <Td> 28 </Td> <Td> 4.1 / 10 </Td> <Td> 18 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 30 , 2012 ( 2012 - 09 - 30 ) </Td> <Td> May 12 , 2013 ( 2013 - 05 - 12 ) </Td> <Td> 10.24 </Td> <Td> 35 </Td> <Td> 3.6 / 9 </Td> <Td> 18 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 29 , 2013 ( 2013 - 09 - 29 ) </Td> <Td> May 11 , 2014 ( 2014 - 05 - 11 ) </Td> <Td> 9.38 </Td> <Td> 35 </Td> <Td> 3.3 / 8 </Td> <Td> 12 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 28 , 2014 ( 2014 - 09 - 28 ) </Td> <Td> May 10 , 2015 ( 2015 - 05 - 10 ) </Td> <Td> 8.98 </Td> <Td> 50 </Td> <Td> 3.2 / 7 </Td> <Td> 17 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 5 </Td> <Td colspan="2"> 23 </Td> <Td colspan="1"> September 27 , 2015 ( 2015 - 09 - 27 ) </Td> <Td> May 15 , 2016 ( 2016 - 05 - 15 ) </Td> <Td> 6.32 </Td> <Td> 69 </Td> <Td> 2.2 / 7 </Td> <Td> 34 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 6 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> September 25 , 2016 ( 2016 - 09 - 25 ) </Td> <Td> May 14 , 2017 ( 2017 - 05 - 14 ) </Td> <Td> 4.39 </Td> <Td> 105 </Td> <Td> 1.5 / 5 </Td> <Td> 70 </Td> </Tr> <Tr> <Td> </Td> <Td colspan="1"> 7 </Td> <Td colspan="2"> 22 </Td> <Td colspan="1"> October 6 , 2017 ( 2017 - 10 - 06 ) </Td> <Td> May 18 , 2018 ( 2018 - 05 - 18 ) </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table>
how many season in once upon a time
how many season in once upon a time
7
7