Poplar Grove (founded in 1859) is a village located in Poplar Grove and Belvidere Townships, Boone County, Illinois, United States. It is part of the Rockford Metropolitan Statistical Area, and of the gated community Candlewick Lake. The population was 5,049 at the 2020 census.

Poplar Grove was named in 1845 for a grove of poplar trees near the native town site. A pronounce office called Poplar Grove has been in operation previously 1848.

On January 7, 2008, on an unusually hot day which proverb temperatures accomplish the mid 60s °F, a tornado struck northern Illinois, including Poplar Grove and Candlewick Lake. The tornado severely damaged a favorite local attraction, Edward’s Apple Orchard. There was one serious insult reported and the broken was widespread. The tornado was complex rated EF4 on the Enhanced Fujita Scale. A weather concern this big had not occurred in the Place since 1967. The tornado was one of the on your own eight rated EF4 during the era span of the hot weather, which lasted from January 7 to January 10. Although there were no losses, it was still a very sharp storm. The behind month the cast of the TV show “Storm Chasers” visited Caledonia Elementary School to talk about tornadoes and the effects they have upon communities. The students and the “Storm Chasers” were featured on a Rockford’s “23 WIFR News” story upon the January 2008 tornado.

On April 9, 2015 northern Illinois was hit bearing in mind another tornado. This time there were four in the surrounding areas of Rockford, Rochelle, and Belvidere. These tornadoes all broke the CD for the last tornado to touch down in the area, and destroyed other favorite attraction, the Summerfield Zoo in Belvidere, as competently as killing some of the animals. The on fire were anything rescued by 200 volunteers who showed occurring to support the day later than the tornadoes.