For most of her life, Utz resided in Little Falls, New Jersey.
She received her Associate degree in Fine Arts from the Art Students League of New York.
Utz wrote a poetry column for the Paterson Morning Call and published in literary anthologies nationally.
In 1957, she married Donald Utz, and in 1962 they had a daughter.
While exhibiting her paintings and collages, she began creating children's books.
For many years, she produced and sold collage works through her business, Lois Utz Originals.
Utz also collaborated as a lyricist with classical composer Richard Lane on a number of songs, including several for children.
Throughout her life, she worked as a volunteer for the mentally ill and wrote several novels about her experiences.
She later received a Bachelor of Arts degree in psychology and a Master of Arts degree in counseling, and practiced as a therapist until her death in 1986.
Her children's books are known for their whimsical illustrations of animals and stories told in rhyme.
Her illustrations often incorporate elements of collage.