Dubuque Times

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

This was 8.5 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 1,013.

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

Degree	Number of people	Percentage of population
No degree	33	4.6
Regular high school diploma	256	35.3
GED or alternative credential	17	2.3
Some college, less than 1 year	86	11.9
Some college, 1 or more years, no degree	97	13.4
Associate's degree	63	8.7
Bachelor's degree	151	20.8
Master's degree	19	2.6
Professional school degree	3	0.4
Doctorate degree	0	0

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