Ermanno Cressoni (22 July 1939 in Milano, Italy – 30 June 2005 in Milano, Italy) was an Italian car designer who worked for both Alfa Romeo and Fiat during his career. He designed or directed the design of a number of significant cars such as the Alfa Romeo 75 and the Fiat Coupe. He was often referrered to as 'Arch'. He died in Milan, Italy in June 2005 after battling cancer for over a year.
Cressoni was director of Centro Stile Alfa Romeo where he designed and oversaw a wide range of cars including the Alfa Romeo Alfetta saloon (1972), and from the late 1970s his 'La Linea' sharp edged designs featured in the Giulietta (1977), Alfa Romeo 33 (1983), Alfa Romeo 75 (1985).  In 1985, Cressoni patented a design for a centre console that featured extra storage space as a result of a U-shaped hand brake and was awarded a US patent (number 4,818,008) in 1989. 
After Fiat acquired Alfa Romeo in 1986, he became director of Centro Stile Fiat where he directed the team that produced Fiat Cinquecento (1991), Fiat Coupé (1993), Fiat Barchetta (1995) and Fiat Bravo (1995). Many of his staff from Alfa Romeo and Centro Stile Fiat became influential designers in their own right, including Chris Bangle, Walter de Silva and Andreas Zapatinas.
- "Car Design News 6 June 2005". Archive.cardesignnews.com. 2005-07-06. Archived from the original on 17 May 2013. Retrieved 2011-04-24.
- re (2005-07-14). "14 July 2005". Italiaspeed.com. Retrieved 2011-04-24.
- "Google patents". Google.com.tw. Retrieved 2011-04-24.
- "Auto Motor und Sport". Auto-motor-und-sport.de. 2005-07-14. Retrieved 2011-04-24.