sentences:  There were 15.4% of families and 9.8% of the population living below the poverty line, including no under eighteens and 20.0% of those over 64.Union Grove is served by the Marshall County School System.Most of its school age children go to Brindlee Mountain Primary from kindergarten through the 2nd grade, Brindlee Mountain Elementary from the 3rd through the 5th grade, then Brindlee Mountain Middle School from 6th to 8th and the Brindlee Mountain High School from the 9th through 12th grades.