The 2015 Spelthorne Borough Council election took place on 7 May 2015 to elect all members of Spelthorne Borough Council in England as one of the 2015 local elections, held simultaneously with the General Election.
Results.
Counting three intermittent by-elections (resulting in a Conservative gain and hold and a Liberal Democrat hold) and five defections from the governing party group in the 2011-2015 period (Cllrs Budd, D. Grant, Forsbrey, Rough and Sexton) the results saw these net changes:
! colspan="2" style="width:230px"|Party
! style="width:30px"|Seats
! style="width:30px"|Gains
! style="width:30px"|Losses
! style="width:30px"|Net gain/loss
! style="width:30px"|Seats %
! style="width:30px"|Votes %
! style="width:60px"|Votes
! style="width:4em"|+/−
Ward by ward.
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
 
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
 
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
 
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
! style="text-align:right;" | Swing
References.
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