| Business | Phone |
| Tax Collector 101 N Washington Ave # 106, El Dorado 71730 | (870) 864-1930 |
| Union County Tax Assessor 101 N Washington Ave # 107, El Dorado 71730 | (870) 864-1920 |
| Union County Treasurer 101 N Washington Ave # 104, El Dorado 71730 | (870) 864-1928 |