Polygraph Testing Coverage

Lie Detector Test in Nassau County, New York

Professional, confidential polygraph examinations across Nassau County — all-inclusive pricing, no hidden fees, and same-day results from examiners trained to APA standards.

2Offices in county

$650+All-inclusive from

HempsteadCounty seat

1.3MPopulation

Book Your Test → View Offices ↓

Testing offices serving Nassau CountyAll prices in USD, all-inclusive

Garden City 1225 Franklin Ave, Garden City, NY 11530 · 1 mi from Hempstead

$650single

$1,200couple

$565group pp

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Lake Success 1979 Marcus Avenue, Lake Success, NY, 11042 · 5 mi from Hempstead

$700single

$1,300couple

$475group pp

Book Details →

Only a $100 deposit secures any booking — refunded in full if we can’t book you, deducted from your total once your appointment is confirmed. Appointment required — no walk-ins.

About

Polygraph Testing in Nassau County

Nassau County is one of the most densely populated counties in the United States, home to nearly 1.35 million residents across the heart of Long Island's western section. With its county seat in Hempstead, Nassau County is defined by a blend of affluent suburban communities, a robust financial services sector, and deep ties to the greater New York metropolitan economy. Our polygraph services are available at two convenient locations within the county: Garden City and Lake Success. Both offices serve the wide range of personal, legal, and corporate testing needs that arise in a county of this size and complexity.

Every examination conducted in Nassau County is governed by a rigorous professional framework that binds our examiners to the highest standards of practice. Our Code of Ethics requires strict impartiality, factual reporting of results, respect for the rights of every examinee, and a prohibition on any incentives that could compromise objectivity. These ethical commitments are reinforced by our Standards of Practice, which mandate the use of validated questioning techniques, properly calibrated instrumentation, controlled testing environments, and secure retention of all examination records. Together, these documents represent binding professional obligations that shape every stage of the testing process.

Consistency across all of our locations is maintained through our Operating Framework, which establishes clear protocols for examiner vetting, ongoing quality assurance, secure client data handling, and standardized results communication. Whether a client schedules a test in Garden City or at any of our 140+ locations across North America, the same exacting procedures apply to every engagement.

Polygraph testing in Nassau County is available at our Garden City office starting at $650 and our Lake Success office starting at $700, with all fees quoted on an all-inclusive basis and no hidden charges. Couple and group testing options are also available for clients who need to coordinate multiple examinations. Contact us or book online to schedule your appointment at the location most convenient for you.

Every polygraph examination in Nassau County is conducted by a professionally trained examiner operating under our published Code of Ethics, Standards of Practice, and Operating Framework — impartial testing, validated techniques, complete confidentiality, and factual reporting on every case.

Why & How

Common Reasons for Testing in Nassau County

Infidelity & Relationship TrustThe most common reason for private polygraph testing in Nassau County. A lie detector test provides objective clarity where emotions run high.

False Accusation DefenseA polygraph examination provides independent, professional evidence of your truthfulness that can support your position in personal, workplace, or legal disputes.

Theft & Employee IntegrityBusinesses use polygraph examinations to investigate internal theft, fraud, and breaches of trust. EPPA guidelines permit specific investigation-related testing.

Personal Peace of MindMany clients schedule polygraph tests to resolve lingering doubts, confirm trust before major life decisions, or settle disputes that conversation alone cannot resolve.

What to Expect — Four Steps from Booking to Report

1Book onlineSelect your location, test type, and preferred dates through our secure booking system.

2Pre-exam formComplete a confidential questionnaire about the matter to be examined.

3ExaminationA thorough pre-test interview followed by the polygraph examination.

4Results & reportA detailed written report with the examiner’s professional opinion, typically same day.

Preparation tip: get a good night’s sleep, avoid excessive caffeine, and arrive 10 minutes early. The best preparation is simply to be well-rested and ready to answer questions honestly.

Coverage & The Law

Nassau County Coverage

Cities We Serve Near Nassau County

Nearby service areas ranked by population — showing the 10 largest of 12.

HempsteadPop. 56K · 2 mi from Garden City LevittownPop. 52K · 6 mi from Garden City FreeportPop. 43K · 6 mi from Garden City HicksvillePop. 42K · 6 mi from Garden City East MeadowPop. 38K · 4 mi from Garden City Valley StreamPop. 38K · 6 mi from Garden City Long BeachPop. 34K · 10 mi from Garden City ElmontPop. 33K · 5 mi from Garden City OceansidePop. 32K · 6 mi from Garden City Franklin SquarePop. 29K · 3 mi from Garden City

+ 2 more nearby cities in Nassau County

Neighboring Counties

New York County1 office · from $650 Westchester County10 offices · from $600 Rockland County4 offices · from $700 Putnam County1 office · from $700 Orange County1 office · from $700 Albany County1 office · from $700

Polygraph Law in Nassau County

The federal Employee Polygraph Protection Act (EPPA) restricts most private employers in Nassau County from requiring lie detector tests for hiring or employment purposes. Narrow exceptions exist for security-related roles, pharmaceutical positions, and specific theft investigations with proper procedural safeguards.

For a complete breakdown of New York’s polygraph statutes and regulations, visit our New York Polygraph Legal Guide.

Office Finder

Which office is closest to you?

The offices above are the ones serving Nassau County. If you are nearer a county or state line the closest office may not be one of them — enter your zip code, town or address to see the nearest offices anywhere in our network, with distances, prices and real drive times.

Examiner Standards

Examiner Standards in Nassau County

New York does not license polygraph examinersAnyone can legally offer testing in New York — which makes an examiner’s training, professional membership, and published standards the only real guarantees. Here is what we verify for every examiner serving Nassau County.

Every Examiner We Assign Meets All of These Criteria

Graduate of an APA-accredited polygraph program (400+ hours)
Current membership of the APA and the state association
Experience & examination history reviewed
Professional liability insurance in place
Validated techniques on calibrated instruments
Bound by our Code of Ethics & Standards of Practice
Ongoing performance monitoring

Professional Bodies in New York

National body — all our examiners American Polygraph Association (APA) · Est. 1966 →

New York association Empire State Polygraph Society (ESPS) →

Membership binds an examiner to a code of ethics, continuing education, and peer accountability. Read about our examiners and our operating framework.

FAQ

Frequently Asked Questions — Nassau County

How much does a polygraph test cost in Nassau County?

A single-person polygraph test in Nassau County ranges from $650 to $700 depending on your chosen location. This is an all-inclusive price covering the examiner, private office facility, pre-examination assessment, the polygraph examination itself, and a detailed written report.

Where can I take a lie detector test in Nassau County?

We have 2 locations across Nassau County: Garden City, Lake Success. Each location offers a private, discreet office environment. All appointments must be booked online in advance.

Are polygraph results admissible in New York courts?

Court admissibility of polygraph results varies by state. For a detailed overview of New York's polygraph laws, see our New York Polygraph Legal Guide. Many clients use our services for private matters where court admissibility is not the primary concern.

How do I book a polygraph test in Nassau County?

All appointments are scheduled online through our secure booking system. Select your preferred Nassau County location, choose your test type, and pick available dates. Appointments are typically available within 3-7 days.

How long does a polygraph examination take?

A typical polygraph examination takes approximately 90 minutes to 2 hours. This includes a thorough pre-test interview, the polygraph examination itself (typically 3-5 relevant questions), and a post-test discussion. Results are usually communicated on the same day.

Can my employer require me to take a polygraph test?

Under the federal Employee Polygraph Protection Act (EPPA), most private employers cannot require employees or job applicants to take a polygraph test. Narrow exceptions exist for certain security, pharmaceutical, and specific theft investigation situations. Government employers are exempt from EPPA restrictions.

Book Your Test in Nassau County

Choose any of our 2 Nassau County offices — professional, discreet, and accurate. Only a $100 deposit to book.

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Page last updated: June 10, 2026 at 10:11 PM