Kathleen Baldwin was born and raised in Arizona, and moved 14 times before high school. The constant moving allowed her to meet many different people from many different backgrounds and areas. She gained a love of reading from her mother, who often read her poems and classic stories before bedtime. Her grandmothers, great-grandmothers, and great-aunts frequently related stories as well, so that a young Baldwin believed that women in general were supposed to tell stories. A voracious reader, Baldwin read at a level beyond her years, and was often excused from English classes to read on her own or to write down her own stories.

After earning a B.A. in Art and Design, Baldwin worked as a freelance artist for many years, designing models for toys while raising her children. During her early years of writing, Baldwin was able to have some of her nonfiction and poetry published, but continually received rejection notices for her fiction submissions. She quit her freelance work to concentrate on her writing and joined the Romance Writers of America. Finally, after 63 rejection notices, Baldwin found a receptive editor at Kensington Books who purchased her novel, a "Regency Romantic Comedy". The editor requested several more novels, and Baldwin was given a deadline of less than a year to complete two more novels and a novella.

Baldwin has been married since the 1980s. She and her husband Brett have four children, three boys and a girl. She and her family live in Texas.

Single novels

• Lady Fiasco (2003)
• Mistaken Kiss (2004)
• Cut From the Same Cloth (2004)

Omnibus in collaboration

• Waltz With a Rogue (2004) (with Mona Gedney and Lisa Noeli)