Delme Bryn-Jones (born Delme Jones; 29 March 1934 – 25 May 2001) was a distinguished Welsh baritone known for his significant contributions to the world of opera.

Born in Brynamman, South Wales, Bryn-Jones received his early education at Brynamman Primary School and later attended Ammanford Technical College. Initially working as a coal miner, he opted to pursue a career in music instead of continuing in the mining industry or following a potential rugby career as an under-21 international player. His musical training began under the guidance of Redvers Llewellyn and continued at the Guildhall School of Music and Drama, eventually leading him to the Vienna Music Academy. He adopted the stage name "Bryn-Jones," incorporating an extra syllable from his birthplace, and made his professional debut in 1959 at Sadler's Wells Theatre. He earned a reputation as one of the world's leading operatic soloists.

Bryn-Jones's ascent to prominence coincided with a golden era for Welsh opera. He followed in the footsteps of the acclaimed British baritone Geraint Evans and preceded the celebrated Bryn Terfel (whose full name is Bryn Terfel Jones). While Bryn-Jones may not be as widely recognized today, his musical talent was exceptional and comparable to that of his contemporaries, including Stuart Burrows, Gwyneth Jones, Margaret Price, Elizabeth Vaughan, Robert Tear, Dennis O'Neill, and Gwynne Howell.

His significant opera débuts included the New Opera Company in 1959 with a role in Maconchy's The Sofa. In 1963, he performed Macbeth alongside Gwyneth Jones for the Welsh National Opera, while also making his Glyndebourne debut as Nick in The Rake's Progress. That same year marked his Covent Garden debut, where he returned in 1965 to portray Paolo opposite Tito Gobbi's Boccanegra, and he sang Marcello in Puccini's La Bohème the following year. His American debut took place in 1967 at the San Francisco Opera, where he performed as Lescaut in Manon and Donner in Das Rheingold. The Vienna State Opera featured him first in 1969 as Renato in Verdi's Un Ballo in Maschera.

Bryn-Jones garnered acclaim at many of the world's leading opera venues, although he was sometimes viewed as too affable to convincingly portray villainous roles typically assigned to baritones. Nonetheless, some critics noted the unsettling contrast of his seemingly honest demeanor, particularly in his portrayal of Iago, which was likened to the demeanor of notorious criminal John Reginald Christie.

Throughout his career, Bryn-Jones faced personal challenges, including struggles with alcoholism, which were acknowledged during his memorial service, reflecting the many lives he influenced through his discreet approach to recovery. In his later years, he served as the President of the Rushmoor Oddfellows Male Voice Choir in Aldershot, Hampshire, and received critical acclaim in 2000 for a series of masterclasses and radio recitals in Canada.

His television and radio appearances were extensive, including several of his own series such as Y Gelli Aur (The Golden Grove; BBC Wales) and Delme (S4C). He also ventured into acting, portraying Captain Cat in Under Milk Wood and Blind Dick Llewellyn in the BBC adaptation of Jack Jones's Off to Philadelphia in the Morning.

Bryn-Jones's impressive repertoire included notable roles such as:

- Beethoven – Fidelio (Don Pizarro) - Berlioz – La Damnation de Faust (Mephistopheles) - Bizet – Les Pêcheurs de Perles (Zurga) - Britten – A Midsummer Night's Dream (Demetrios) - Cilea – Adriana Lecouvreur (Michonnet) - Donizetti – Don Pasquale (Malatesta) - Giordano – Andrea Chenier (Gerard) - Gluck – Alceste (Hercule) - Mascagni – Cavalleria Rusticana (Alfio) - Mozart – Cosi Fan Tutte (Guglielmo) - Mozart – Le Nozze di Figaro (Almaviva) - Mozart – Die Zauberflöte (Papageno, speaker) - Puccini – Madama Butterfly (Sharpless) - Puccini – Il Tabarro (Michele) - Verdi – Aida (Amonasro) - Verdi – Falstaff (Ford) - Verdi – Otello (Iago) - Verdi – Rigoletto (title role) - Verdi – La Traviata (Giorgio Germont) - Weber – Abu Hassan (Omar)