Zillow

Source

The "Zillow Economics Data" is hosted by Kaggle here:

As a side note (although we did not yet download any of this data directly from Zillow), we emphasize that Zillow also provides Housing Data directly

including an Econ Data API:

Description of the Data

Kaggle mentions that this data is gathered by Zillow’s Economic Research Team

Transformations to the original data source

None.