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Round Barn, Millville TownshipRound Barn, Millville Township · Photo: JERRYE & ROY KLOTZ MD · CC BY-SA 3.0
The Osterdock handbook

Living in Osterdock, IA: what to set up and who to call

Most mail in Osterdock goes to 52035 (77% of residents), one of 2 ZIP codes in town. For a library card, the closest branch is Guttenberg Public Library, 4.6 miles out.

Which school will my kid attend?How do I register to vote?ZIP codes

I’m new in town

What to set up in Osterdock, and who provides it. Tap an answer for the details and where they come from.

PowerInterstate Power and Lightinvestor-owned utility · 17.8¢/kWhMore →Internet2 providers100% of addresses get 100/20 MbpsMore →Trash & dumpNot on file yetWe don’t have Osterdock’s trash rules yetMore →SchoolClayton Ridge Community School DistrictWhich school depends on grade and addressMore →Register to voteOnlineRules from vote.govMore →ZIP codes52035, 52052Where people live, not P.O. boxesMore →
Home services

Power, water and internet

Who to call to start service at a new address in Osterdock.

Electricity

Power comes from Interstate Power and Light

Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility, serves all of Osterdock. Its homes paid an average of 17.8¢ per kWh in 2025, about $131 a month (its average across Iowa).

Start or move service: alliantenergy.com · (319) 786-4411

Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.

Internet

2 home internet providers serve Osterdock

100% of 22 addresses can get 100/20 Mbps; 100% can get fiber.

ProviderTechnologyAddressesFastest (Mbps)
Alpine CommunicationsFiber100%500/500
VerizonFixed wireless9%25/6

FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.

Trash & recycling

We don’t have Osterdock’s trash rules yet

Pickup rules, the dump and recycling in Osterdock.

Trash, recycling and bulk pickupNot on fileOpenStreetMap lists no public drop-off in Osterdock or within 5 miles (as of Oct 9, 2026); map coverage varies by town.
Schools

Where your child goes to school

Public school districts and the school path by grade.

Osterdock kids go to
PK–5Clayton Ridge Elementary Schoolin Garnavillo
6–8Clayton Ridge Middle Schoolin Guttenberg
9–12Clayton Ridge High Schoolin Guttenberg

Osterdock is in Clayton Ridge Community School District.

Test scores and every school: see Schools →

U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.

Government & voting

Town hall and registering to vote

Who to call, and how to register.

Town HallBudget, officials, electionsOsterdock’s government in one page
Who runs elections hereClayton County AuditorElections here are run by Clayton County (county election office). 111 High Street NE, Suite 102, Elkader, IA 52043 · (563) 245-1106 · [email protected]FVAP, Jun 2023
Register to voteOnlineIn Iowa you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before).vote.govCheck your registration and polling placesos.iowa.govThe state’s voter lookup

Election office: FVAP local election office directory, updated Jun 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.

ZIP codes & area codes

Osterdock spans 2 ZIP codes

ZIP codes where Osterdock residents live, with the share of the town in each.

ZIPPost office nameShare of OsterdockZIP’s residents in Osterdock
52035Colesburg, IA77%4%
52052Guttenberg, IA23%0%

Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.

Everyday places

Getting around, the ER and the library

One line each; the subject pages have the rest.

Nearest emergency roomGuttenberg Municipal Hospital4.8 miles awayGet a library cardGuttenberg Public Library603 S Second St. · (563) 252-3108

ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.

Questions about living in Osterdock

Who provides electricity in Osterdock?

Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility. Its homes paid about 17.8¢ per kWh in 2025 (EIA).

What internet providers serve Osterdock?

Alpine Communications, Verizon (FCC, as of December 2025).

What ZIP codes are in Osterdock?

52035 (77%), 52052 (23%), by share of residents. Census 2020 ZIP Code Tabulation Areas.

What school district is Osterdock in?

Clayton Ridge Community School District.

How do I register to vote in Osterdock?

In Iowa you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before). Elections here are run by the Clayton County Auditor. Check your registration at sos.iowa.gov.

Sources & dates

Every answer above names its source. Here they are with their dates.

  • Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
  • Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
  • ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
  • Schools: NCES Common Core of Data, 2024–25.
  • Registration: vote.gov, updated Nov 18, 2024 (read Oct 10, 2026). Official sites and area codes: Wikidata.
  • Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
  • Internet: FCC National Broadband Map, as of December 2025.