When the four US regions are broken down further into individual states (and the District of Columbia), we are able to better understand differences and similarities within regions and make comparisons between and among states. Some of the results were surprising, such as the density of some states relative to others, the median family size in states with high levels of immigration, which states have a decline in the number of institutionalized persons and which states are seeing increases in the male proportion of the population.
•Nevada had the largest population increase from 2000 to 2010 (35%) and North Dakota had the largest increase from 2010 to 2015 (12.5%), followed by Texas (9.2%)
•In 38 out of 51 states, the percentage of male population increased from 2000 to 2010
•In 30 out of 51 states, the number of institutionalized persons decreased from 2000 to 2010
•In 2010 Maine had the smallest average family size (2.83) and Utah had the largest (3.56)
•All states saw an increase in both percentages of the population over 18 and median age from 2000 to 2010 with the exception of the District of Columbia, which had a decrease in the median age. Utah has the lowest median age at 29.2 as of 2010
•New Jersey had the highest population density in 2015 with 1,027.14 persons per square mile
Pew American Cities Project