The purpose of the NRAAO is to:
- Provide training and educational opportunities for assessing officials;
- Organize an annual conference on assessment administration for the benefit of assessing officers in the Northeastern United States and Canadian Provinces;
- Improve the standards of assessment practices in the Northeastern United States and Canadian Provinces;
- Better acquaint assessing officials of the Northeastern United States and Canadian Provinces with more efficient and uniform administration of tax laws; and
- Furnish an opportunity for discussion upon subjects relating to general property taxation.
The Northeastern Regional Association of Assessing Officers includes the following United States and Canadian Provinces:
| Connecticut | New Brunswick |
| Delaware | Newfoundland |
| District of Columbia | Nova Scotia |
| Maine | Ontario |
| Maryland | Prince Edward Island |
| Massachusetts | Quebec |
| New Hampshire | |
| New Jersey | |
| New York | |
| Pennsylvania | |
| Rhode Island | |
| Vermont |