Waterloo, Iowa
Waterloo is a city in Black Hawk County, Iowa, with 67,314 residents in 2020. It is in Iowa's 2nd congressional district. It spans 2 state senate and 3 state house districts.
County
| County | Share of residents |
|---|---|
| Black Hawk County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Iowa's 2nd congressional district (IA-02) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IA-02) | Ashley Hinson (R) | 202-225-2911 | 100% |
| U.S. Senator | Chuck Grassley (R) | 202-224-3744 · contact form | statewide |
| U.S. Senator | Joni Ernst (R) | 202-224-3254 · contact form | statewide |
| State Senator (State Senate District 31) | Bill Dotzler (Democratic) | 96% | |
| State Senator (State Senate District 38) | Dave Sires (R) | 4.5% | |
| State Representative (State House District 62) | Jerome Amos (Democratic) | 48% | |
| State Representative (State House District 61) | Timi Brown-Powers (Democratic) | 48% | |
| State Representative (State House District 76) | Derek Wulf (R) | 4.5% |
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Waterloo website: http://www.ci.waterloo.ia.us/
- Waterloo laws: search for the Waterloo, Iowa code of ordinances
- Black Hawk County website: http://www.co.black-hawk.ia.us
- Black Hawk County laws: search for the Black Hawk County, Iowa code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 31 | 96% |
| State Senate District 38 | 4.5% |
| State house district | Share of residents |
|---|---|
| State House District 62 | 48% |
| State House District 61 | 48% |
| State House District 76 | 4.5% |
ZIP codes
Percentages mark ZIPs only partly in Waterloo: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Waterloo's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:1982425")
Waterloo here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.