Bon-y-maen (until 2022 Bonymaen) is an electoral ward in the City and County of Swansea, Wales, UK.

The ward is bounded by Neath Port Talbot county borough to the east and the Swansea wards of Llansamlet and Morriston to the north; St. Thomas to the south; and Landore to the west.

For the purposes of elections Bon-y-maen is divided into several polling districts: Winch Wen, Pentre Dwr, Hanover Square and Pentrechwyth. Bon-y-maen returns 2 councillors to the local council. The current councillors are Mandy Evans and Paul Lloyd (both Labour Party).

The electoral ward consists of some or all of the following areas: Bon-y-maen, Cefn Hengoed, Copper Quarter, Crymlyn Bog, Morfa, Pentrechwyth, Pentre Dwr, Winch Wen, in the parliamentary constituency of Swansea East.

Bonymaen 2017

Party		Candidate	Votes	%	±%
	Labour	Mandy Evans*	1,050
	Labour	Paul Lloyd*	1,010
	Plaid Cymru	Geraint Couch	249
	Conservative	Elaine Hughes	227
	Conservative	Wendy Olsen	210
Turnout				28.9	−3.3
	Labour hold		Swing
	Labour hold		Swing

Bonymaen Ward (2 seats), 2012

Party		Candidate	Votes	%	±%
	Labour	Paul Lloyd	959	32.49
	Labour	Mandy Evans	893	30.26
	Independent	Mair Gibbs*	514	17.41%	−26.56
	Independent	John Hague*	493	16.70	−20.63
	National Front	Sion Owens	92	3.11	−15.57
Majority
Turnout			2,951

Bonymaen Ward (2 seats), 2008

Party		Candidate	Votes	%	±%
	Labour	Mair Gibbs*	1,052	43.97
	Independent	John Hague*	893	37.33
	BNP	Sion Owens	447	18.68
	Labour hold		Swing
	Independent hold		Swing
Turnout			2,392

Bonymaen 2004

Party		Candidate	Votes	%	±%
	Independent	John Hague*	1,093
	Labour	Mair Gibbs*	936
	Plaid Cymru	Philip Couch	386
	Liberal Democrats	Vivienne Samuel	224
	Independent hold		Swing
	Labour hold		Swing

At a by-election an Independent candidate captured the seat from Labour and held it at the next election in 1999.

Bonymaen 1999

Party		Candidate	Votes	%	±%
	Independent	John Hague*	1,246
	Labour	Mair Gibbs*	1,240
	Labour	Wyndham Davies	632
	Liberal Democrats	Nora O'Sullivan	311
	Independent hold		Swing
	Labour hold		Swing

The first election to the new unitary City and County of Swansea Council took place in 1995. Both seats were won by Labour.

Bonymaen 1995

Party		Candidate	Votes	%	±%
	Labour	Mair Gibbs	1,185
	Labour	David Watkins	1,044
	Liberal Democrats	Brian Thomas	186
	Liberal Democrats	Trevor Warden	140
	Labour win (new seat)
	Labour win (new seat)

51°38′50″N 3°54′33″W / 51.64726°N 3.90925°W / 51.64726; -3.90925