Sioux City Times

29.5 percent of people 25 years or older had an associate's degree or higher in Castana in 2020, according to data obtained from the U.S. Census Bureau.

This was 11.6 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 205.

88.4 percent of the population had at least a high school diploma or the equivalent.

Degree	Number of people	Percentage of population
No degree	17	11.6
Regular high school diploma	38	26
GED or alternative credential	15	10.3
Some college, less than 1 year	23	15.8
Some college, 1 or more years, no degree	10	6.8
Associate's degree	28	19.2
Bachelor's degree	12	8.2
Master's degree	1	0.7
Professional school degree	0	0
Doctorate degree	2	1.4

*All data is for residents who were at least 25 years old in 2020.