Warren County property tax rates, 2025

22 municipalities, ranked from lowest to highest effective rate. The median in Warren County is 2.403 per $100.

Lowest general rate
2.620White Township
Highest general rate
5.890Washington Borough
Municipalities
222025
1 Harmony Township 2.665 1.592-0.045
2 White Township 2.620 1.809+0.120
3 Allamuchy Township 3.227 1.926+0.017
4 Blairstown Township 3.134 2.144+0.033
5 Hope Township 3.466 2.195+0.042
6 Frelinghuysen Township 2.858 2.202+0.000
7 Hardwick Township 3.825 2.221+0.182
8 Liberty Township 3.656 2.260+0.255
9 Knowlton Township 4.271 2.324+0.289
10 Franklin Township 3.129 2.337-0.116
11 Alpha Borough 3.485 2.396-0.159
12 Lopatcong Township 3.042 2.410+0.055
13 Independence Township 3.795 2.437+0.121
14 Mansfield Township 3.563 2.483+0.026
15 Greenwich Township 4.052 2.546+0.068
16 Hackettstown Town 3.477 2.686+0.058
17 Washington Township 4.110 2.691+0.099
18 Oxford Township 4.827 2.727-0.020
19 Belvidere Town 3.302 2.948+0.119
20 Phillipsburg Town 4.675 2.955+0.130
21 Washington Borough 5.890 2.975+0.305
22 Pohatcong Township 4.535 2.997+0.177

Rates are per $100 of assessed value. Rank 1 has the lowest effective rate in the county.

Source: New Jersey Division of Taxation, 2025 General Tax Rates by County and Municipality. Retrieved 2026-10-24.

Property tax in Warren County

In 2025, the general tax rate in Warren County ranges from 2.620 in White Township to 5.890 in Washington Borough, per $100 of assessed value. On an assessed value of $300,000, that's $7,860 to $17,670 a year before exemptions. Because assessments sit at different shares of market value from place to place, compare places with the effective rate, which is what the ranking above uses.

Choose a municipality above for its rate history and a bill calculator, or read the New Jersey property tax guide for how assessments, due dates and appeals work.