Black Hawk County is a district of Iowa.
Boundaries: United States Census Bureau, MAF/TIGER Database (https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html) via geoBoundaries, public domain
| City of Cedar Falls | no seat recorded | 39 k |
| City of Evansdale | no seat recorded | 5 k |
| City of Waterloo | Waterloo | 68 k |
| Township of Barclay | no seat recorded | |
| Township of Bennington | no seat recorded | |
| Township of Big Creek | no seat recorded | |
| Township of Black Hawk | no seat recorded | |
| Township of Cedar | no seat recorded | |
| Township of Cedar Falls | no seat recorded | |
| Township of Eagle | no seat recorded | |
| Township of East Waterloo | no seat recorded | |
| Township of Fox | no seat recorded | |
| Township of Lester | no seat recorded | |
| Township of Lincoln | no seat recorded | |
| Township of Mount Vernon | no seat recorded | |
| Township of Orange | no seat recorded | |
| Township of Poyner | no seat recorded | |
| Township of Spring Creek | no seat recorded | |
| Township of Union | no seat recorded | |
| Township of Washington | no seat recorded |
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