Monument Hills first appeared as a
census designated place in the
2010 U.S. census. The whole population lived in households, and 0.0% of residents lived in urban areas while 100.0% lived in rural areas. The age distribution was 383 people (22.5%) under the age of 18, 125 people (7.3%) aged 18 to 24, 321 people (18.9%) aged 25 to 44, 543 people (31.9%) aged 45 to 64, and 330 people (19.4%) who were 65years of age or older. The median age was 46.4years. For every 100 females, there were 97.2 males, and for every 100 females age 18 and over there were 97.5 males age 18 and over. There were 605 housing units at an average density of , of which 586 (96.9%) were occupied. Of these, 528 (90.1%) were owner-occupied, and 58 (9.9%) were occupied by renters. Of all housing units, 3.1% were vacant; the homeowner vacancy rate was 0.2% and the rental vacancy rate was 7.5%. ==Education==