Top Definition
A small town located in Northern Illinois with a population of about 2000. The school mascot is a Indian. The town is made up of 1 gas station, 2 banks, 4 bars, 1 pharmacy, 5 churches, and a few eateries. It is also home of "The Pec Thing", a large bi-annual flea market/antique show and The Winnebago County Fair. The famous Pecatonica river runs through the edge of town.
Where the hell is Pecatonica?

Do you want to go the The Pec Thing this weekend?

Lollapalooza played in Pecatonica in 1996.
by Pecatonica January 30, 2011

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