HARTFORD, CT - Governor Ned Lamont today is marking International Open Data Day - which is celebrated this year on Wednesday, March 5, 2025 - by highlighting the availability of data from Connecticut state government that is made available to the public through the Connecticut Open Data Portal at data.ct.gov.

The portal was launched to make data collected by the state government more open and easily accessible to its owners, the residents and taxpayers of Connecticut. It aims to make data easily accessible to individuals, researchers, entrepreneurs, academics, policymakers, and other state agencies to spur innovation and collaboration in the state.

“Connecticut’s Open Data portal, data.ct.gov, and the related Connecticut Geodata Portal, geodata.ct.gov, provides residents, researchers, reporters, and others with a tremendous amount of information to help make informed decisions,” Governor Lamont said. “The state’s open data efforts are extraordinarily beneficial to our residents, businesses, and governments, as we can make the data instantly available and customizable to the user. With this, we have been able to accurately report spending, learn about the impact of pandemic recovery efforts, assist with human resources planning, economic development, public health, and sustainability, and address historical inequities. Our efforts have already received national recognition, and I look forward to seeing the growing continuation of these open data efforts.”

Eleven years since its establishment, the Connecticut Open Data Portal continues to make data collected by state agencies accessible to the public to promote government transparency. The portal hosts more than 600 datasets published by state agencies and over 35 data stories that highlight trends in the data hosted on the portal, serving more than 185,000 users in the last year.

The portal provides transparency on critical topics that impact Connecticut and inform policymakers, employers, and residents. In the past year, additions to the portal have included:

• The Supplier Diversity Dashboard, which highlights small and minority-owned businesses in Connecticut, and State of Connecticut Executive Branch Workforce Dashboard.
• The Find Your Local Veterans Representative app, which helps veterans find their local representative.
• New data from the Connecticut State Library including Index of Marriages, 1897-2001; Index of Deaths, 1897-2001; and Compiled Legislative Histories.
• New dashboards from the Connecticut Department of Revenue Services on income taxes and sales taxes.
• Data on electric vehicle registrations from the Connecticut Department of Motor Vehicles.
• Data on disconnected and at-risk youth in Connecticut from P20 WIN.

Other recent open data initiatives in Connecticut include:

• Convening open data users in state government for Open Data Day on March 5 to learn about open data initiatives in the state and celebrate the open data program in Connecticut.
• Supporting agency capacity by publishing the Data Visualization and Accessibility Guidelines, which include best practices on developing accessible data visualizations.
• Inventorying the use of artificial intelligence in Connecticut state agencies.
• Making data more accessible through the development of new data stories including:
  • Connecticut’s Supplier Diversity Program Dashboard
  • Infrastructure Investment and Jobs Act Dashboard
  • American Rescue Plan Act (ARPA) Funding and Project Inventory Dashboard
  • Medical Marijuana Program Dashboard
  • Connecticut Sales and Use Tax Summary
  • Connecticut Personal Income Tax Summary

Open Data Day is an annual celebration of open data - data that can be accessed and used by anyone for any purpose - all over the world. Groups from around the world create local events on the day where they will use open data in their communities. It is an opportunity to show the benefits of open data and encourage the adoption of open data policies in government, business, and civil society.