Castle Without was an electoral ward in the Royal Borough of Windsor and Maidenhead from 2003 to 2019. It was first used at the 2003 elections and last used for the 2015 elections. The ward returned three councillors to Windsor and Maidenhead Borough Council. It covered Windsor town centre. The ward was formed in 2003 from parts of the Castle, Park and Trinity wards. After 2019 the area has been part of the Eton and Castle and Old Windsor wards.
The election took place on 7 May 2015.
The election took place on 5 May 2011. Cat Burnsall was a UKIP councillor from 2012 to 2015.
The election took place on 3 May 2007.
The election took place on 1 May 2003.