Mercer County, New Jersey — 2026 Loan Limits & Market Data

Mercer County is a mid-sized county in New Jersey with a population of approximately 392,138 residents spread across 226 square miles. The county is a densely populated urban area with 1,735 residents per square mile, which shapes both the local housing market and the types of properties available to buyers.

For 2026, the conforming loan limit in Mercer County is $832,750 for a single-family home, which is the national baseline. FHA borrowers can access loans up to $541,287 for a one-unit property. These limits determine the maximum loan amount available through conventional and government-backed financing before buyers would need to seek jumbo loans, which carry different qualification requirements and typically require higher down payments.

Given Mercer County's urban density, buyers should expect competitive market conditions with a diverse mix of single-family homes, condominiums, and multi-family properties. The county spans 26 ZIP codes, each with its own micro-market dynamics affecting pricing, inventory levels, and days on market. Exploring individual ZIP codes below can help identify neighborhoods that match specific budget and lifestyle preferences.