There are at least two projects called Illinois:

1) Chilean indie rock band from La Serena, They released debut album called "Propulsor" in 2014.

2) Hailing from Bucks County, PA, Illinois is an indie/folk rock band with an articulate & engaging sound. Boasting catchy keyboard skills, sudden surprising banjo licks, & handclaps galore, their witty songs waver between gloomy & uplifting, mischievous & delicate. They formed in 2004, with Chris Archibald handling guitar, keys, banjo, & vocals, Martin Hoeger on bass, & backing vocals, Dru Lee on guitar, keyboards, & backing vocals, & JohnPaul Kuyper on drums.

The Current Line-up consists of....

Chris 'Arch' Archibald-
guitar, keys, banjo, lead vocals

Martin Hoeger-
bass, vocals

JohnPaul Kuyper-
drums

Dan Pawlovich-
guitar, keys, vocals

Chris Shepherd-
guitar, vocals