Delaware County, Iowa Cities (2025)

10 cities

City
Rank
2025 Pop.
2020 Pop.
Change
Density
Area (mi²)
Type
Manchester15,3495,0741.04%1,1054.84 City
Earlville27177170%1,3010.55 City
Hopkinton36256220.16%9740.64 City
Delhi44444141.37%4680.95 City
Colesburg5381386-0.26%1,2960.29 City
Ryan63453470%7880.44 City
Greeley72162160%5760.38 City
Dundee81941940%6160.32 City
Delaware91381400%1890.73 City
Masonville1099990%3030.33 City

Delaware County Cities Summary

Largest City

Manchester is the largest city in Delaware County, with a population of 5,349.

Smallest City

Masonville is the smallest city in Delaware County.

10 Largest Cities

There are 10 cities in Delaware County, Iowa.

Location of Delaware County