City of Deer Park City of Deer Park Search | Advanced Search | New Members | Coupons and Discounts | All Categories Government & Education >> Government >> Government Agencies City of Deer Park PO Box FDeer Park, WA 99006 (509) 276-8801 Visit Site Connect With Us Our population is currently at 4,520 and growing. We are a supportive city for new and established businesses. Member Since: 2014 Send a message to: City of Deer Park Your Name: Your Email: Subject: Message: (Date: 4/23/2025)