Carmen Weiler Sastre (born 25 October 2004) is a Spanish swimmer, having her best results at backstroke events.

She competed in the women's 100 metre backstroke at the 2024 Summer Olympics, where she stablished a new Spanish national record in the preliminary heats, with a time of 59.57 seconds, qualifying to the semifinals.

[1] In this event she finished in a final 9th overall position.

She was born and raised in Singapore to a German father and a Spanish mother.

This biographical article related to a Spanish swimmer is a stub.