Linda Castillo is an American author of novels including the New York Times bestselling Kate Burkholder series, which are a crime thrillers set in Amish country. She has also written numerous romance and romantic suspense novels.

Castillo is the recipient of awards including the Daphne du Maurier Award, the Holt Medallion, and a nomination for the RITA.

Castillo grew up in Arcanum, Ohio. She lives in Texas with her husband.