The Sierra Club is the oldest (1892) and largest (2 million+ members) volunteer-led environmental organization.

The Sierra Club Lehigh Valley Group has over 2,200 members in Lehigh, Northampton, Monroe and Carbon counties; the Pennsylvania Chapter Sierra Club has over 32,000 members. 

Sierra Club Lehigh Valley engages in local volunteer work involving clean water, clean air, land conservation, climate disruption, clean energy, environmental health, and support of environmentally-engaged political candidates. 

chair: Donald W. Miles:
vice chair/Conservation chair: Matthew MacConnell:

mailing address: P.O. Box 126, Trexlertown, PA 18087
telephone:  610-730-2514  or   610-657-2707
local website:

Facebook:  “Sierra Club Lehigh Valley Group”
MeetUp:  “Sierra Club Lehigh Valley Group” 

Pennsylvania Chapter Sierra Club website:
mailing address: P.O. Box 606, Harrisburg, PA 17108
telephone: 717-232-0101

National Sierra Club website:
mailing address: 2101 Webster Street, Suite 1300, Oakland, CA 94612
telephone: 415-977-5500