County administrative profile
Osage County
Missouri • FIPS 29151
Osage County Assessor and Collector serves as the identified local county assessor for this jurisdiction. Its public resources are the practical starting point for confirming parcel details, assessed value, tax account information, and the correct route for a valuation question or exemption filing.
Responsible office
Osage County Assessor and Collector
- Authority
- County Assessor
- Phone
- Assessor: 573-897-2217 ext. 135; Collector: 573-897-2135 ext. 120
- In-person address
- Osage County Administration Building, 205 E. Main St., Linn, MO 65051; assessor PO Box 409; collector PO Box 616
- Public hours
- Monday–Friday, 8:00 a.m.–4:30 p.m.; closed legal holidays (official Missouri Association of Counties directory).
Official channels
Go straight to the local source
Use the channel that matches your task. Parcel research, map review, and payment collection may be handled by different offices or platforms within the same county.
Agency website
The primary public homepage identified for this appraisal or assessment authority.
Open official resourceProperty search
Search the active parcel or property account lookup when you need an owner, situs, or assessment record.
No verified active link published
GIS parcel map
Open the interactive map when location, parcel boundaries, or neighboring property context matters.
No verified active link published
Tax collection
Use the identified collection channel for bills, balances, receipts, and payment instructions.
No verified active link published
What to do next
A practical path from question to official record
Identify the parcel
Start with the property search or GIS map and capture the account, parcel, or situs information shown by the county.
Confirm the timeline
Review the local mailing, payment, exemption, and valuation-review guidance before a statutory window closes.
Keep proof
Save notices, account numbers, submissions, payment confirmations, and correspondence for your transaction file.