Colorado Lobbyist Monthly Income and Expenditure Reports

Monthly disclosure reports from professional lobbyists in Colorado. The data includes summaries of income, expenditures, and business associated with pending legislation, provided by the Colorado Secretary of State via data.colorado.gov. Records were last updated in April 2026.

Use Cases

• Analyze trends in totalMonthlyIncome and totalMonthlyExpenditures by lobbyistFirmName over time using reportMonth and fiscalYear.
• Map the geographic distribution of lobbying activity by aggregating data based on the lobbyistZip field.
• Identify lobbyists (lobbyistFirstName, lobbyistLastName) most frequently associated with legislation via the businessAssociatedWithLegislation field.
• Track reporting compliance and timeliness by comparing reportDueDate, dateDisclosureFiled, and dateDisclosureLastModified.
• Profile lobbying firms by joining records on primaryLobbyistID or annualLobbyistRegistrationID.

Strengths

• Data is updated regularly, with a last updated date of April 2026.
• Contains over 15 specific columns detailing financials, identities, and legislative connections.
• Provides temporal structure with reportMonth, fiscalYear, and multiple date columns for time-series analysis.

Limitations

• Sample size and total row count are unknown, limiting assessment of statistical power.
• Geographic coverage is limited to the state of Colorado, not nationally representative.
• Data completeness for fields like businessAssociatedWithLegislation is unspecified and may contain nulls.

Provenance

Source

Colorado Secretary of State, published on data.colorado.gov.

Collection Method

Mandatory disclosure reports filed by registered professional lobbyists.

Time Range

Monthly coverage, specific date range unknown.

Freshness

Updated monthly, with platform metadata indicating a recent update in April 2026.

Geography

State of Colorado, United States.