Oklahoma State Election Board - OK Election Data Warehouse
Ready Justice Public

The OK Election Data Warehouse (EDW) includes public data from voter information files and precinct lists in Oklahoma. Voter registration information includes a unique voter ID, political affiliation, status (active/inactive), voting districts, voter history, and method of voting. Data is shown by county, by congressional district, by state senate district, or by state house district. Other data collections include absentee requests and records of deleted voters.

Oklahoma Department of Corrections (DOC)
Ready Justice Public

Publicly available Oklahoma Department of Corrections data includes "inmate names, sentences, reception dates, status, etc. No private information such as health records, social security numbers, or inmate banking information is included."

Note: Access to the data source is available by following the provided link and clicking "Public Inmate Data."

Census - American Community Survey - S2901 Citizen, Voting-Age Population
Ready Justice Public

This source provides demographic information on U.S. Citizens aged 18 years and older. Available demographic disaggregates include sex, age, race and ethnicity, educational attainment, poverty status, and household income. The Census dashboard allows users to filter by geography and year. The data in the link provided is filtered to show Tulsa and Oklahoma Counties, but additional filters are available.