Eugen (originally Eugène) Francis Charles d'Albert (10 April 1864 – 3 March 1932) was a Scottish-born pianist and composer who immigrated to Germany and later to Switzerland.

Educated in Britain, d'Albert showed early musical talent and, at the age of seventeen, he won a scholarship to study in Austria. Feeling a kinship with German culture and music, he soon immigrated to Germany, where he studied with Franz Liszt and began a career as a concert pianist. D'Albert repudiated his early training and upbringing in Scotland and considered himself German.

While pursuing his career as a pianist, d'Albert focused increasingly on composing, producing 21 operas and a considerable output of piano, vocal, chamber and orchestral works. His most successful opera was Tiefland, which premiered in Prague in 1903. His successful orchestral works included his cello concerto (1899), a symphony, two string quartets and two piano concertos. In 1907 d'Albert became the director of the Hochschule für Musik in Berlin, where he exerted a wide influence on musical education in Germany. He edited critical editions of the scores of Beethoven and Bach, transcribed Bach's organ works for the piano and wrote cadenzas for Beethoven's piano concertos. He also held the post of Kapellmeister to the Court of Weimar.

D'Albert was married six times, including to the pianist-singer Teresa Carreño, and was successively a British, German and Swiss citizen. His first son was Louis-Albert Salingré.

D'Albert was born at 4 Crescent Place, Glasgow, Scotland, to an English mother, Annie Rowell, and a German-born father of French and Italian descent, Charles Louis Napoléon d'Albert (1809–1886), whose ancestors included the composers Giuseppe Matteo Alberti and Domenico Alberti. D'Albert's father was a pianist, arranger and a prolific composer of salon music who had been ballet-master at the King's Theatre and at Covent Garden. D'Albert was born when his father was 55 years old. The Musical Times wrote in 1904 that "This, and other circumstances, accounted for a certain loneliness in the boy's home-life and the years of his childhood. He was misunderstood, and 'cribbed, cabined, and confined' to such an extent as to largely prejudice him against the country which gave him birth".

D'Albert was brought up in Glasgow and taught music by his father until he won a scholarship to the new National Training School for Music (forerunner of the Royal College of Music) in London, which he entered in 1876 at the age of 12. D'Albert studied at the National Training School with Ernst Pauer, Ebenezer Prout, John Stainer and Arthur Sullivan. By the age of 14, he was winning public praise from The Times as "a bravura player of no mean order" in a concert in October 1878. He played Schumann's Piano Concerto at the Crystal Palace in 1880, receiving more encouragement from The Times: "A finer rendering of the work has seldom been heard." Also in 1880, d'Albert arranged the piano reduction for the vocal score of Sullivan's sacred music drama The Martyr of Antioch, to accompany the chorus in rehearsal. He is also credited with writing, under Sullivan's direction, the overture to Gilbert and Sullivan's 1881 opera, Patience.

For many years d'Albert dismissed his training and work during this period as worthless. The Times wrote that he "was born and educated in England, and won his earliest successes in England, although, in a freak of boyish impetuosity, he repudiated some years ago all connexion with this country, where, according to his own account, he was born by mere accident and where he learnt nothing." In later years, however, he modified his views: "The former prejudice which I had against England, which several incidents aroused, has completely vanished since many years."

In 1881 Hans Richter invited d'Albert to play his first piano concerto, which was "received with enthusiasm". This seems to have been d'Albert's lost concerto in A major, not the work published three years later as his Piano Concerto No. 1 in B minor, Op. 2. In the same year d'Albert won the Mendelssohn Scholarship, enabling him to study in Vienna, where he met Johannes Brahms, Franz Liszt and other important musicians who influenced his style. D'Albert, retaining his early enthusiasm for German culture and music ("hearing Tristan und Isolde had a greater influence on him than the education he received from his father or ... at the National Training School for Music") changed his first name from Eugène to Eugen and immigrated to Germany, where he became a pupil of the elderly Liszt in Weimar.