Deadline: check your city
Founded in 2013, Red Bull Arts is a national, experimental, and non-commercial arts program dedicated to creating new opportunities for artists and fostering public engagement in the arts. With physical spaces in New York and Detroit, Red Bull Arts aims to extend the boundaries of exhibition making; support the production of new work by emerging and established artists; participate in and respond to the needs of local arts communities; and contribute to ongoing dialogue around contemporary issues and thought.
See more at their website here, which has a list of cities where microgrants are available.