The total population of Rockbridge is estimated to be 135 with 57 males (42.22%) and 78 females (57.78%). There are 21 more females than males in Rockbridge.
In 2022, the population of Rockbridge was 172, a 1.71% decrease year-by-year from 2021. Previously, in 2021, Rockbridge's population was 175, a decline of 0.57% compared to a population of 176 in 2020.
The median age in Rockbridge, IL is 45.5, as per 2021 ACS 5-Year Estimates. Of the total population, 26.34% were under the age of 15, 15.59% aged 15 to 29, 44.09% aged 30 to 64, 12.90% aged 65 to 84, and 1.08% were 85 years of age and older.