COUNTY · ME
Waldo County, Maine
Waldo County is a county in Maine with FIPS code 23027 and an estimated population of 40,620 (Census 2023), 11th largest of 16 in the state.
County facts
- Name
- Waldo County
- State
- Maine
- Type
- county
- FIPS code
- 23027
- State FIPS
- 23
- Population (2023)
- 40,620
- Change since 2020
- +2.4%
- State rank
- 11 of 16
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Waldo County?
Waldo County, Maine has the five-digit FIPS code 23027: 23 for the state and 027 for the county.
What state is Waldo County in?
Waldo County is in Maine.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.