Alday is a surname. The Basque noble family Alday, whose coat of arms is shown at right, originated in Getxo.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e6/Blason_Es_famille_Alday_%28Biscaye-Guipuscoa-Labourd%29.svg/150px-Blason_Es_famille_Alday_%28Biscaye-Guipuscoa-Labourd%29.svg.png)
Notable people with the surname include:
- Gene Alday (born 1957), American Republican politician from Mississippi
- James Alday (1516–1576?), English navigator, explorer and privateer
- John Alday (fl. 1570), English translator of semi-philosophical and classical works
- Luis Trujillo Alday (born 1993), Mexican professional footballer
- Manuel Alday Marticorena (1917–1976), Spanish footballer who played for Real Madrid
- Paul Alday (c. 1763–1835), French violinist and composer resident in Ireland
- Ricardo Alday Castillo (born 1979), Mexican civil engineer
- David Alday Alvarez (born 1991), Mexican Photographer