Lescher & Mahoney was a noted American architectural firm from Phoenix, Arizona.
The firm was established in 1910 by Royal W. Lescher (1882-1957). Lescher was born in Galesburg, Illinois, and his family moved to California soon afterward. He graduated from the Throop Polytechnic Institute in 1902, before working in Los Angeles and Buffalo. In 1908 he came to Phoenix, where he took a job with Thornton Fitzhugh, with whom he remained until 1910. Lescher practiced alone until 1912, when he took John R. Kibbey (1883-1963) as a partner, forming Lescher & Kibbey.
In 1917 Leslie J. Mahoney (1892-1985) joined the firm as a designer. He was born in De Soto, Missouri and was educated at Santa Clara College in California. He was promoted to partner in 1921. The new firm, Lescher, Kibbey & Mahoney, was dissolved in 1922 when Kibbey left to design movie sets in Hollywood. The resulting partnership of Lescher & Mahoney survied until Lescher's death in 1957. However, Mahoney retained the name until his retirement in 1975, when the firm was sold. It was acquired by DLR Group of Omaha. Again, the name was retained and Lescher & Mahoney continued to operate semi-autonomously until 1998, when the firm was fully merged into DLR.
Many of the firm's works are listed on the National Register of Historic Places.