Lyon County Iowa © 2020 - Disclaimer                                                                                                                                                                                                                                                                                       Email:                                                                                                  

Lyon County, Iowa




Phone:  (712) 472-8230


Office Hours:

8:00 AM - 4:30 PM

Monday - Friday


Mailing Address:

Lyon County Engineer's Office

315 1st Avenue, Suite 100

Rock Rapids, IA  51246



Lyon County Engineer


The County Engineer's Office is responsible for the design and general road maintenance of the Secondary Road System in Lyon County.  There are 245 miles of hard-surface roads, 755 miles of gravel roads, and 245 bridges in the county.







Forms & Documents

Lyon County Engineer Office


Contracts and Quotes