Affing is a municipality near () Augsburg in Aichach-Friedberg district, in Swabia - Bavaria, southern Germany.
The municipality covers an area of . Of the total population of 5,140, 2,591 are male, 2,248 are female, and 301 are of indeterminate status (Dec 31, 2003). The population density of the community is .
Districts (villages) of the municipality Affing: Affing with Iglbach, Anwalting, Aulzhausen, Bergen, Frechholzhausen, Gebenhofen, Haunswies, Katzenthal, Miedering, Mühlhausen, Pfaffenzell.
In May 2015 a tornado devastated Affing, causing severe damage.