Montgomery County, colloquially referred to as Montco, is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population of the county was 856,553, making it the third-most populous county in Pennsylvania after Philadelphia and Allegheny counties and the most populous county in Pennsylvania without a major city.

The county seat and largest city is Norristown. The county is part of the Philadelphia–Camden–Wilmington PA-NJ–DE–MD metropolitan statistical area, known as the Delaware Valley, and marks the Delaware Valley's northern border with the Lehigh Valley region of eastern Pennsylvania.

Key Cities/Towns

Municipalities

Bryn Athyn
Cheltenham Township
Horsham Township
Norristown (county seat)
Plymouth Township
Whitemarsh Township

Boroughs
Ambler Bridgeport Bryn Athyn Collegeville Conshohocken East Greenville Green Lane Hatboro Hatfield	Jenkintown Lansdale Narberth Norristown North Wales Pennsburg Pottstown Red Hill	Rockledge Royersford Schwenksville Souderton Telford Trappe West Conshohocken

Townships
Abington Cheltenham Douglass East Norriton Franconia Hatfield Horsham Limerick Lower Frederick Lower Gwynedd	Lower Merion Lower Moreland Lower Pottsgrove Lower Providence Lower Salford Marlborough Montgomery New Hanover Perkiomen Plymouth	Salford Skippack Springfield Towamencin Upper Dublin Upper Frederick Upper Gwynedd Upper Hanover Upper Merion Upper Moreland	Upper Pottsgrove Upper Providence Upper Salford West Norriton West Pottsgrove Whitemarsh Whitpain Worcester

Megan's Law Statistics

(Copy from PA Megan's Law Database, click on Community Tools at top then the 3rd "Count of..." link and tally residents only)


County Total	Lifetime	Out of State	Pre-SORNA SVP	SVDC	SVP	Ten-Year	T1	T2	T3
1,013	169	53	27	0	56	24	212	135	337

Last updated: 10/23/25

Registration Sites

(copy from https://www.meganslaw.psp.pa.gov/VerificationSites/VerificationSiteSearch)

Abington Township Police, 1166 Old York Rd, ABINGTON PA 19001, 267-536-1100
Montgomery Co Adult Probation, 408 Cherry Street, NORRISTOWN PA 19401, 610-992-7777
State Police Skippack, 2071A Cressman Rd, SCHWENKSVILLE PA 19473, 610-584-1250

County parole/probation office contact information

Replace with relevant links:

Local Reentry Resources

If you know of any local reentry organizations in the county, please contact us at contact@parsol.org. Replace with relevant links:

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SOAB Approved Treatment Providers

Reference SOAB website - Remove ones that don't apply

Other PFR-specific resources

State Representatives and Senators

Find your state representatives and senators here: palegis.us.

PARSOL Information

Region & Contact

Region: Southeast
Contact:

County Contact

First Name Last Initial