New Boston Flag

New Boston

County:
Mercer County
County Seat:
No
Area (mi²):
0.941
State:
Illinois

New Boston is a city located in Mercer County, Illinois. New Boston has a 2026 population of 605. New Boston is currently declining at a rate of -1.14% annually and its population has decreased by -1.47% since the most recent census, which recorded a population of 614 in 2020.

605
Total Population
643
Density (mi²)
-7 -1.14%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)