Colusa County Property Tax Rates by City, Area, and Tax District 2026
Property owners in Colusa County can use the county’s tax-rate data and assessment information to understand how local property taxes are determined. A 2026 county-level estimate puts the effective property tax rate at about 0.66%, although actual bills vary by property, tax rate area, exemptions, and local charges.
Effective Tax Rate
0.66%
Median Property Tax
$2,481
Tax per $100K
$661
Last Update
August 2026
Colusa County Property Tax 2026-27
Colusa County Property Tax Rate
Colusa County property tax rates vary by district in the provided data. Parcel bills can still include fixed charges, parcel taxes, CFD charges, or special assessments depending on the property.
Base rate
1.0000% general ad valorem tax.
District rates
Colusa County district rates vary from 1.0000% to 1.2600% in the provided data.
Direct charges
Special assessments and parcel charges are added separately.
Area
Representative Rate
Arbuckle / Pierce Unified Zone
1.0650%
Colusa (City)
1.1300%
Countywide-Unitary Base
1.0000%
Grimes District
1.0450%
Maxwell District
1.2600%
Princeton Joint Unified Zone
1.0550%
Stonyford District
1.0300%
Williams (City)
1.1250%
Other Colusa County Property Tools
Tax-rate information is more useful when viewed alongside parcel, valuation, location, and zoning details. These tools can help buyers, owners, investors, and researchers investigate individual properties in Colusa County.
Colusa County Property Search
Search property information using an owner name, address, parcel number, city, ZIP code, or other available property filters.
Colusa Property Tax Calculator
Estimate potential annual property taxes by entering a property value and applying relevant tax-rate information.
Colusa Doc Stamp Calculator
Estimate applicable documentary or document-related transfer tax charges associated with qualifying real estate transactions.
Colusa County Zoning and Maps
Explore property locations, parcel boundaries, zoning information, maps, and other geographic details for local research.
How Property Tax Rates Are Applied in Colusa County
The amount appearing on a property tax bill depends on more than a property’s market price. California’s assessment system establishes a taxable assessed value, and the applicable tax rate area determines the ad valorem taxes. Additional direct charges may also appear separately on the bill.
Assessed Value and Taxable Value
The county assessor establishes assessed values for property-tax purposes. Under California’s Proposition 13 framework, a property’s base-year value generally follows a purchase or qualifying change in ownership, with annual increases generally limited to 2%. Exemptions can reduce taxable value.
Applying the Property Tax Rate
Ad valorem property tax is calculated by applying the applicable rate to the taxable assessed value. California’s constitutional framework generally limits the basic property tax rate to 1%, with additional amounts possible for voter-approved bonded indebtedness and other authorized charges.
Tax Rate Areas
The exact tax rate depends on the parcel’s tax rate area, or TRA. Each TRA represents a particular combination of cities, schools, and revenue districts, so two properties in different parts of the county can have different combined rates.
Special Assessments and Direct Charges
A tax bill may include charges that are separate from the basic ad valorem property tax. Colusa County maintains information on parcel-level direct charges, and questions about those charges can be directed to the county Auditor’s office.
Voter-Approved Bonds and Taxes
Local voters can approve bonded indebtedness and other charges that affect property-tax bills. These amounts are tied to authorized local financing and can vary according to the tax districts serving a particular parcel.
Reassessment and Supplemental Taxes
A purchase, qualifying ownership transfer, or new construction can trigger a reassessment. When a new assessment applies during the tax year, a supplemental assessment may result in an additional tax bill separate from the regular annual bill.
Why Tax Rates Vary Across Local Districts
Colusa County includes incorporated communities such as Colusa and Williams as well as rural and unincorporated areas. Different combinations of schools, service districts, bonds, and other taxing agencies create distinct tax rate areas across the county.
- Tax districts exist to finance specific public services and authorized local government functions.
- Schools, cities, county services, and other agencies can serve different geographic portions of the county.
- Each tax rate area reflects a particular combination of taxing agencies serving that location.
- Neighboring parcels may fall into different districts, producing different combined property-tax rates.
- Voter-approved bonds and special taxes can add charges to properties within defined areas.
- A property's parcel location determines which tax rate area and applicable direct charges apply.
Check Property Tax Rates in Nearby California Counties
Comparing county-level property tax information can help buyers, owners, investors, and researchers evaluate differences across Northern California. California Property Checker provides county-specific property information and tools for researching taxes, parcels, assessments, and related real estate details.
Frequently Asked Questions
Does buying a property in Colusa County trigger reassessment?
Generally, a change in ownership can cause the assessor to establish a new market value for property-tax purposes. Certain qualifying transfers may receive an exclusion from reassessment when statutory requirements are satisfied.
Can new construction increase my property taxes?
Yes. Most new construction requires an appraisal, and the added improvement can increase the property’s assessed value. Depending on timing, the change may also produce a supplemental property tax assessment.
When are secured property taxes due in Colusa County?
For the 2026–27 fiscal year, the first secured-tax installment is due November 1, 2026, and becomes delinquent after December 10, 2026. The second installment follows the standard February 1 and April 10 schedule.
What happens if a property tax payment is late?
A 10% penalty is generally added when a secured installment becomes delinquent. For the second installment, the county’s published notice also provides for an additional $20 cost after the delinquency deadline.
How can I challenge my property's assessed value?
Start by presenting relevant evidence to the Assessor’s office. If the disagreement remains unresolved, an owner can request a hearing before the Assessment Appeals Board within the applicable filing period.
Does Colusa County offer a Homeowners' Exemption?
A qualifying homeowner who occupies the property as a principal residence on January 1 may apply for a $7,000 reduction in assessed value. This can lower the property’s taxable value and resulting tax obligation.
Can a lower market value reduce my property taxes?
Potentially. If a property’s current market value on January 1 is below its Proposition 13 factored base-year value, the assessor may enroll the lower value under California’s decline-in-value rules.
Who determines the assessed value of my property?
The Colusa County Assessor is responsible for valuing real property and applying qualifying exemptions. The Assessor does not collect taxes, calculate tax bills, or set property tax rates.
Who collects property taxes in Colusa County?
Property tax collection is handled by the County Treasurer-Tax Collector. The county’s published payment information provides current payment deadlines and instructions for secured and unsecured property taxes.
Where can I check charges or information for a specific parcel?
A parcel’s exact tax situation can be researched using its assessment and tax-rate-area information. Colusa County also directs questions about ownership, valuation, and exemptions to the Assessor, while questions about direct assessments or charges go to the Auditor’s office.