Carmen Alonso (born 15 July 1984) is a Spanish professional golfer and Ladies European Tour (LET) player.

She won gold at the 2001 Mediterranean Games and finished 5th at the 2000 Espirito Santo Trophy together with Tania Elósegui and Marta Prieto.

Alonso turned professional in late 2004 after she finished T30 at the Ladies European Tour Qualifying School.

She played in the 2009 Women's British Open at Royal Lytham & St Annes Golf Club and made the cut.

In 2023, at 38 years old, Alonso won her maiden LET victory at the Ladies Open by Pickala Rock Resort in Finland, after 19 seasons and 251 starts.