Marshall County property record for 509 River St, Oslo, MN 56744
| Property Type | Single Family Home |
|---|---|
| Details | 992 sqft · built 1968 |
| Lot Size | 0.172 acres (7,498 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $316 (2026) |
| Flood Zone | Zone X (reduced by levee) |
| APN | 55-0174-000 |
| Primary APN | 55-0174-000 |
|---|
| Building Area | 992 sqft Living Area |
|---|
| Year Built | Built 1968 |
|---|---|
| Effective Year Built | Effective 1968 |
| Lot Area | 7,498 sqft (0.172 acres) |
| Garage Type | Attached |
| Garage Area | 630 sqft |
| Street Address | 309 5TH AVE E |
|---|---|
| City | OSLO |
| State | MN |
| Zip | 56744-4421 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | GUNDERSONS 1ST ADDN |
| Legal Subdivision | GUNDERSONS 1ST ADDN |
| Legal Block | 1 |
| Legal Lot Number | 4 |
| Jurisdiction | MARSHALL MN |
| Township / Civil Division | OSLO |
| Census Block Group | 1 |
| Census Block | 1374 |
| Census Tract | 80300 |
Source: Marshall County records, as of September 9, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | PO BOX 146, OSLO, MN 56744-0146 |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
Source: Marshall County assessment roll, as of September 9, 2026
| Type | Name |
|---|---|
| State | Minnesota |
| County | Marshall County |
| Municipality | Oslo City |
| Unified School District | Warren-Alvarado-Oslo School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $316.00 (+26.4%) | $16,400 (+10.81%) Land $5,000 Building $11,400 | $16,400 (+10.81%) Land $5,000 Building $11,400 |
| 2025 | $14,800 (+13.85%) Land $5,000 Building $9,800 | $14,800 (+13.85%) Land $5,000 Building $9,800 | |
| 2023 | $250.00 | $13,000 Land $5,000 Building $8,000 | $13,000 Land $5,000 Building $8,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective September 30, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X reduced by levee · depends on levee performance |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 10 policies |
| Nearby Flood Policies | 10 in force |
| Nearby Flood Claims | 225 (1978–2022) |
| Claims Outside the SFHA | 16 of 225 |
| Most Recent Claim | May 2022 · Severe Storms, Straight-line Winds, And Flooding |
| Claims by Event |
|
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 97% of the US · lower than 89% of Minnesota |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | Oslo serves 242 people · EPA ID MN1450008 |
|---|---|
| Water Source | Purchased groundwater from Marshall-Polk Rural Water System |
| Last State Inspection | Jun 2024 |
| Lead | Under 1 ppb (2021–2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 87 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Midco Cable · Fixed Wireless in parts of the area | 1,250 / 60 |
5G (outdoors only) and 4G LTE
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