Canlyniadau etholiadau ar gyfer De Brychdyn

 Independent Ennill Chrissy Gee was wedi'i ethol with a majority of 3%. Cafodd cyfanswm o 1921 o bleidleisiau eu bwrw.

Table of main parties and election candidates retaining deposit

Ymgeisydd etholiad	Plaid	Nifer	%	Statws	% Newid
Chrissy Gee	Independent	566	29%	Newly elected	n/a
Ryan James McKeown	Llafur Cymru	514	27%	Newly elected	n/a
Mike Lowe	Llafur Cymru	401	21%	Heb ei ethol	n/a
Penny Brett-Roberts	Independent / Annibynnol	239	12%	Heb ei ethol	n/a
Duncan Clubbe	Ymgeisydd Plaid Geidwadol Cymru	201	10%	Heb ei ethol	n/a