Hazelgreen is an unincorporated community in eastern Laclede County, Missouri, United States. It lies along historic U.S. Route 66, now an outer road of Interstate 44. The town is split by I-44, just west of the 145 exit. Currently, four to five houses, a church, and a fire station are all that exist at the location.
The fire station is one of three that is manned by the Hazelgreen Fire Protection District which took its name from the primary station (the first one established), being located in the area of the old community.