How to Find Someone in New Castle County, Delaware

New Castle County is Delaware's northernmost and most populous county, holding approximately 574,000 residents — roughly 55% of the state's total population. Wilmington is the county seat and largest city. The county's northern border sits directly against southeastern Pennsylvania, and the Philadelphia metro area extends through New Castle County without any economic or cultural break. Many New Castle County residents commute to jobs in Chester County or Delaware County, Pennsylvania, and address histories frequently cross the state line. A Delaware Courts Online search covers New Castle County comprehensively within Delaware, but it tells only part of the story for anyone with Pennsylvania ties.

Delaware Courts Online at courts.delaware.gov covers all three Delaware counties — including New Castle — in a single name-based search. Superior Court, Court of Common Pleas, Family Court, and Justice of the Peace records are all accessible through the portal. With only three counties in the entire state, New Castle County searches within Delaware are simpler than in most comparable jurisdictions. The complexity comes from the cross-state Pennsylvania dimension, not from within-state structural issues. For the full Delaware context, see our Delaware state guide.

Key takeaways

• New Castle County has approximately 574,000 residents (U.S. Census Bureau, 2023 ACS) — about 55% of Delaware's total population, with Wilmington as county seat.
• Delaware Courts Online at courts.delaware.gov covers New Castle County in the same statewide search as Kent and Sussex counties — no pre-selection needed.
• Pennsylvania UJS (ujsportal.pacourts.us) is the standard cross-state supplement — Chester County and Delaware County PA are directly adjacent and many New Castle County residents have Pennsylvania address histories.
• Wilmington has one of the highest violent crime rates per capita of any US city of its size — Superior Court criminal filing volume in New Castle County is elevated relative to the county's overall population.

How record searches work in New Castle County

Delaware Courts Online is the starting point for any New Castle County court search. A name query returns Superior Court, Court of Common Pleas, Family Court, and Justice of the Peace case results for New Castle County alongside the rest of Delaware — no county pre-selection is needed. Superior Court results cover felony criminal cases and major civil matters; Court of Common Pleas covers misdemeanors and lower civil matters; Family Court covers divorce, custody, and domestic relations. All three tiers appear in the same portal search.

For the Pennsylvania cross-state supplement, Pennsylvania's UJS statewide portal at ujsportal.pacourts.us covers all 67 Pennsylvania counties — including Chester County (Coatesville, Downingtown, West Chester) and Delaware County PA (Media, Upper Darby, Haverford) — in a single statewide name search. Running both Delaware Courts Online and Pennsylvania UJS is the standard complete approach for any New Castle County search involving a subject with known Pennsylvania address history. Our guide on finding someone by name and city covers how to use Wilmington vs. Chester County or Delaware County PA context to route correctly.

New Castle County court system overview

New Castle County is served by Delaware Superior Court (felony criminal cases, major civil matters, complex business litigation), Court of Common Pleas (misdemeanor criminal cases, civil cases under $75,000), Family Court (all domestic relations statewide), and Justice of the Peace Courts (minor civil and criminal matters at the local level). Delaware's Court of Chancery handles corporate and equity matters and is headquartered in Wilmington — Chancery Court records involve corporate entities rather than personal matters for most people-search purposes, but can surface useful identity information for business owners and executives.

All court tiers are accessible through Delaware Courts Online. Document-level access requires contacting the relevant courthouse clerk — the Leonard L. Williams Justice Center at 500 N. King St. in Wilmington houses Superior Court, Court of Common Pleas, and Family Court for New Castle County. See our court record search guide for Delaware's multi-tier structure.

Types of records available in New Castle County

• Superior Court records — felonies, major civil — Delaware Courts Online; full documents via the Justice Center at 500 N. King St., Wilmington
• Court of Common Pleas records — misdemeanors, lower civil — same Delaware Courts Online portal
• Family Court records — divorce, custody, domestic relations — Delaware Courts Online; some Family Court matters have restricted public access
• Arrest records — Delaware State Police for county areas; Wilmington Police Department for city arrests; other municipal departments for incorporated communities
• Property records — New Castle County Assessment Division for property tax; Office of the Recorder of Deeds for deed records
• Pennsylvania cross-state records — Pennsylvania UJS portal for Chester County, Delaware County PA, and all 67 PA counties

Crime statistics and public-safety context

New Castle County's crime profile is shaped overwhelmingly by Wilmington's violent crime rates, which consistently rank among the highest per capita in the United States for cities of comparable size. The suburban New Castle County communities — Newark, Middletown, Bear, Hockessin, Pike Creek — report rates substantially lower than Wilmington and more typical of suburban Mid-Atlantic communities. Wilmington's elevated crime rate means Superior Court criminal filing volume in New Castle County is disproportionately high relative to the county's 574,000 residents. Delaware State Police and the FBI UCR provide county and city-level crime data. When running criminal record searches, adding Wilmington neighborhood or ZIP code context significantly narrows results for common surnames.

Major cities and communities in New Castle County

Wilmington

Wilmington (est. pop. 73,000 — U.S. Census Bureau, 2023 ACS) is the county seat and Delaware's largest city. Despite its relatively modest population, Wilmington is a major Mid-Atlantic financial and corporate services center — JPMorgan Chase, Bank of America, Barclays, and major credit card issuers have substantial Delaware operations due to Delaware's favorable banking laws. This creates a professional workforce with above-average address mobility in the financial district and downtown areas alongside the city's urban residential neighborhoods. Wilmington's high violent crime rate generates Superior Court criminal filing volume substantially above what the 73,000 population would suggest. Wilmington Police handles city law enforcement.

Newark

Newark (est. pop. 33,000 — U.S. Census Bureau, 2023 ACS) is home to the University of Delaware (~24,000 students). The university creates significant student-era address churn in campus-adjacent ZIP codes — Newark DE addresses in the 19711-19716 range should be treated as potentially historical for former UD students. Newark sits immediately adjacent to the Pennsylvania state line; Cecil County, Maryland is also nearby. The cross-state Pennsylvania check is particularly relevant for Newark given its border proximity.

Middletown

Middletown (est. pop. 25,000 — U.S. Census Bureau, 2023 ACS) is in the southern part of New Castle County and has grown rapidly over the past two decades as families have relocated from the Wilmington corridor seeking newer housing. Middletown address records have above-average turnover for a community of its size given the rapid in-migration pattern. Many current Middletown residents have prior Wilmington or Chester County PA address histories.

Bear and Glasgow

Bear (est. pop. 20,000) and Glasgow are unincorporated New Castle County communities east of Wilmington with large residential populations. Both are served by Delaware State Police (no separate municipal police) and their residents file with New Castle County courts. Bear's substantial Latino community — one of the more significant Latino populations in Delaware — means Spanish surname variant checks are relevant for Bear-anchored searches.

Hockessin and Pike Creek

Hockessin and Pike Creek are affluent unincorporated western New Castle County communities near the Pennsylvania border with among the lowest crime rates in Delaware. Many residents commute to Chester County or Delaware County PA for employment. The Pennsylvania cross-state check is particularly important for Hockessin and Pike Creek given their border proximity — some residents may have prior Chester County PA addresses from before moving to New Castle County.

Common search scenarios

Searching by name and city in New Castle County

Delaware Courts Online covers New Castle County in the same statewide search as Kent and Sussex — no pre-selection. For Wilmington, adding ZIP code context (19801-19806 for central Wilmington; 19802-19805 for north and east Wilmington neighborhoods) reduces noise for common surnames. For Newark, treat campus-area ZIPs as potentially stale for former UD students. For western communities near the Pennsylvania border (Hockessin, Pike Creek, Greenville), run Pennsylvania UJS in parallel. See our name and city guide.

Checking New Castle County court records

Delaware Courts Online for statewide case-level index across all three Delaware counties → Leonard L. Williams Justice Center for full documents (Superior Court, Court of Common Pleas, Family Court) → Delaware State Police SBI for comprehensive criminal history → Delaware DOC for state prison history → Pennsylvania UJS for cross-state Chester County and Delaware County PA records. See our court record search guide.

Searching for a Philadelphia metro commuter

For New Castle County subjects whose employment or address history suggests Philadelphia metro ties — particularly communities near the Pennsylvania border — run Pennsylvania UJS alongside Delaware Courts Online. Pennsylvania UJS is free and covers all 67 Pennsylvania counties in one search. Chester County (West Chester, Coatesville, Exton) and Delaware County PA (Upper Darby, Haverford, Radnor) are the most commonly relevant PA counties for New Castle County cross-state searches.

Best sites to review first

For New Castle County searches, these are the two services I recommend reviewing first.

These services are not consumer reporting agencies. Do not use them for employment, tenant screening, insurance, or any FCRA-regulated purpose.

Other Delaware county guides

• Delaware State Guide (covers all 3 counties)