How to Find Someone in Delaware County

Delaware County (locally called "Delco") is the immediate southwestern suburb of Philadelphia, sharing a county line with the city along its entire eastern border. With an estimated 576,000 residents in a county of only 184 square miles, it is one of the most densely populated counties in Pennsylvania. The density and the Philadelphia border create a practical search dynamic: many Delaware County residents have lived in Philadelphia at some point, and many Philadelphia residents have prior Delaware County addresses. A search anchored only to one side of that border will frequently miss records from the other.

Pennsylvania's UJS statewide portal covers Delaware County court records alongside all 66 other Pennsylvania counties. For the broader Pennsylvania context, see our Pennsylvania state guide.

Key takeaways

• Delaware County has an estimated 576,000 residents in 184 square miles — one of the most densely populated counties in Pennsylvania.
• The Philadelphia border means prior Philadelphia records are common for Delaware County subjects and vice versa — always check both in the UJS statewide search.
• Chester, in the county's southeast, has historically been one of the highest-crime cities in Pennsylvania and generates a disproportionate share of the county's serious criminal court filings.
• Upper Darby Township, bordering West Philadelphia, is the most populous municipality in the county at around 82,000 residents and a major source of search volume.

How record searches work in Delaware County

Delaware County uses Pennsylvania's standard court structure — Court of Common Pleas for felonies, major civil, and family law; Magisterial District Courts for misdemeanors, summary offenses, and minor civil matters. Both tiers are accessible through the Pennsylvania UJS statewide portal, which is the correct first stop for any Delaware County court search.

For criminal history context beyond the UJS, the Pennsylvania State Police PATCH system provides a statewide name-based background check. For property records, the Delaware County Recorder of Deeds maintains online access to deeds and liens. Our guide on finding someone by name and city explains how to use a Delaware County city clue — especially the Upper Darby and Chester areas — to sharpen UJS results before drilling into case-level detail.

Delaware County court system overview

Delaware County is served by the Court of Common Pleas, which sits in the county courthouse in Media. The county has 14 magisterial district courts spread across its municipalities. Both tiers are in the UJS portal. Delaware County's court filing volume is substantial for its size — the combination of high population density and the spillover from Philadelphia's criminal activity in border communities like Upper Darby and Darby Borough creates above-average per-capita filing rates.

Delaware County also has a separate Delaware County Juvenile Court and a separate Adult Probation and Parole Department — these are not in the UJS public portal and require separate contact for any records. For a broader explanation of Pennsylvania's court structure, see our court record search guide.

Types of records available in Delaware County

• Court of Common Pleas records — felonies, civil cases, family law — Pennsylvania UJS portal
• Magisterial District Court records — misdemeanors, summary offenses, minor civil — also in UJS portal
• Property records — Delaware County Recorder of Deeds; Delaware County Board of Assessment for ownership and valuation
• Arrest records — local municipal police (there are 49 separate police departments in Delaware County); Pennsylvania State Police PATCH for statewide criminal history
• Marriage and death records — marriage licenses issued by Delaware County Register of Wills; Pennsylvania DOH Vital Records for statewide index

Crime statistics and public-safety context

Delaware County's crime picture is shaped by significant internal variation. The county's suburban western and northern communities (Haverford, Radnor, Marple, Newtown) have crime rates comparable to the lowest-crime Philadelphia suburbs. Chester, in the southeastern corner, has one of the highest violent crime rates of any city in Pennsylvania. Upper Darby, immediately west of Philadelphia, falls between these extremes but generates high court filing volume due to its density.

For records searches, this internal variation matters: a search anchored to "Delaware County" without a city will surface results from across that entire spectrum. Adding a city or neighborhood is particularly important in Delaware County because the difference between a Chester result and a Haverford result is meaningful. Source: Pennsylvania State Police, Uniform Crime Report 2023.

Major municipalities in Delaware County

Upper Darby Township

Upper Darby Township (est. pop. 82,000 — U.S. Census Bureau, 2023 ACS) is the largest municipality in Delaware County and borders West Philadelphia along its eastern edge. Its density and proximity to Philadelphia produce the highest court filing volume in the county. Upper Darby has significant immigrant and first-generation communities — South Asian, Southeast Asian, and West African populations are well-established in specific Upper Darby neighborhoods, which means name searches here benefit from phonetic variation checks more than in most Delaware County communities.

Chester

Chester (est. pop. 34,000 — U.S. Census Bureau, 2023 ACS) is a small city on the Delaware River in the county's southeastern corner. It is the county's oldest city and has historically had one of the highest violent crime rates of any Pennsylvania municipality. Chester's court filing volume for serious criminal matters is disproportionate to its population relative to the rest of Delaware County. Searches for Chester subjects should expect dense results in the UJS for criminal matters.

Haverford Township

Haverford Township (est. pop. 50,000 — U.S. Census Bureau, 2023 ACS) is an affluent inner-ring suburb immediately west of Philadelphia's Main Line communities. Its court filing volume is relatively low for its population, weighted toward civil and family law matters rather than criminal. Haverford College's presence in the adjacent Havertown community creates a small student-transient population in its ZIP codes.

Springfield Township

Springfield Township (est. pop. 25,000 — U.S. Census Bureau, 2023 ACS) is a mid-county suburb with a mix of residential and commercial character. It is often overlooked in Delaware County searches because it lacks a distinctive landmark or city identity — searches anchored to Springfield may require confirmation that the subject was in Delaware County's Springfield and not Springfield Township in Montgomery County, which has the same name and is a common source of address confusion in the Philadelphia suburbs.

Radnor Township

Radnor Township (est. pop. 32,000 — U.S. Census Bureau, 2023 ACS) is one of the most affluent communities in Delaware County, containing the Main Line communities of Wayne and Villanova. Villanova University's presence creates student-era addresses that persist in commercial databases long after graduation. Corporate headquarters presence — several major companies have offices in the Radnor/Wayne corridor — also creates a professional transient population with multi-state address chains.

Common search scenarios

Searching by name and city in Delaware County

Start with the UJS statewide portal's name search — it covers all 67 Pennsylvania counties and will surface both Delaware County records and any Philadelphia records from prior residence without requiring county pre-selection. For subjects associated with Upper Darby or Chester, expect high result volumes and add date of birth or middle initial. For subjects from Haverford, Radnor, or Springfield, result sets are typically smaller and city name alone usually narrows effectively.

Checking Delaware County court records

The UJS portal is the primary access point. For document-level access beyond what the docket sheet shows, contact the Delaware County Prothonotary's office in Media directly. For magisterial district court records, the docket sheets in UJS are the practical access point — full documents from magisterial courts require contacting the specific district judge's office. See our court record search guide for detail on navigating Pennsylvania's two-tier system.

Searching for subjects with Philadelphia ties

The Philadelphia-Delaware County border is heavily crossed in both directions. Someone who grew up in West Philadelphia may have Delaware County records from a period of residence in Upper Darby or Sharon Hill, and vice versa. The UJS statewide search surfaces both automatically — do not limit the search to Delaware County alone if there is any reason to think the subject may have Philadelphia history. A name and relative search often surfaces the cross-county address chain before any court-level search.

Best sites to review first

Before moving into Delaware County's court or recorder systems, these are the two services I recommend reviewing first.

Frequently asked questions

Other Pennsylvania county guides

• Philadelphia County
• Allegheny County (Pittsburgh)
• Montgomery County
• Bucks County