Emerald Cities Collaborative (ECC) is a national non-profit organization based in Washington, D.C., with affiliate offices in Boston, Los Angeles, New York, Oakland, San Francisco and Seattle.

The collaborative comprises more than 21 national organizations and focuses on retrofitting urban building stock, developing infrastructure, and promoting diverse local economies built around energy efficiency.

[2] In 2022, Emerald Cities Collaborative, along with HR&A Advisors, Elevate, and the American Council for Energy-Efficient Economy (ACEEE), announced the launch of Residential Retrofits for Energy Equity (R2E2) program.

[4][5][6] The organization also engages in workforce development, providing labor-community partnerships, training programs, and career pipelines to pair qualified individuals with green jobs.

[7][8] Additionally, Emerald Cities advocates locally and nationally for policy supporting efficient infrastructure and contracting that includes minority-owned businesses.