Mercer County, New Jersey Eviction Risk: High

Mercer County scores 7.8/10 (High risk) across its 20 municipalities, placing it 8th of 21 counties in New Jersey eviction laws, where 7 counties carry greater landlord exposure and 13 are more favorable territory. For investors, that headline figure translates to real operating friction: an average rent of $1,719 per month, a rent-burden rate of 31.1%, and a renter share of 43.4% of households, all pointing to a tenant population under consistent financial pressure. Collection risk, turnover, and the cost of any contested removal compound quickly in this environment.

What the county average does not reveal is the 4.5 to 8.7 spread between the lowest- and highest-risk municipalities inside Mercer County. An investor who picks the wrong sub-market can face conditions far worse than the county midpoint suggests, while the right pocket offers meaningfully lower exposure. The 4.3-point range is wide enough to treat Mercer County as several distinct markets rather than one uniform decision.

The cities inside Mercer County

The pressure concentrates sharply in the county seat. Trenton, with a population of 90,338, scores 8.6/10, making it the dominant risk driver in the county simply by volume of rental units. Windsor tops the risk table at 8.7/10, the highest reading in the county, while Groveville and Kingston each land at 8.5/10. Mercerville (8.1/10, population 13,535), Twin Rivers (8.2/10), and Yardville (8.2/10) round out the tier of markets that consistently run above the county average.

Investors seeking lower exposure have more workable options on the western and northern edges of the county. Princeton scores 6.3/10 (population 30,756), Hamilton Square comes in at 6.8/10 (population 11,622), and Hightstown at 6.7/10. These are still material risk readings, but they sit noticeably below both the county average and the high-risk cluster anchored by Trenton. Risk is hyper-local here, and submarket selection is one of the few variables a landlord can actually control before acquiring a property.

State-level laws that apply here

New Jersey eviction laws imposes a mandatory just-cause eviction standard under N.J.S.A. § 2A:18 (Anti-Eviction Act), meaning landlords must cite a legally recognized ground before beginning any removal, regardless of lease expiration. Nonpayment cases can be filed with no advance notice period, while disorderly conduct and willful damage each require a 3-day notice, a substantial lease violation triggers a 30-day notice, and an owner move-in or substantial renovation requires a 60-day notice. Understanding the New Jersey eviction process fully matters before a landlord acts, because a procedural misstep restarts the clock. Court filing fees run $50 to $100, sheriff lockout fees add $40 to $150, and attorney fees typically range from $750 to $3,500. An uncontested case closes in roughly 30 to 60 days; a contested one can stretch to 90 to 180 days. New Jersey does not preempt local rent control, so individual municipalities may layer additional restrictions on top of state law. Landlords should also review New Jersey security deposit limits and the state's source-of-income protections, which are active under New Jersey Division on Civil Rights enforcement, before screening applicants. The New Jersey eviction costs alone are enough to make vacancy prevention a first-order financial priority in any Mercer County portfolio.

With a poverty rate of 15.5% and renters making up 43.4% of households countywide, the underlying demand pressures are real but so is the collection risk; the city-by-city scores above give the clearest picture of where within Mercer County those conditions are most acute.