Municipal government. City Hall handles administration, zoning, water/sewer billing, and public works.

Public high school district serving Marengo and surrounding areas. Grades 9-12.

Fire protection and emergency medical services for Marengo and surrounding areas.

Maintains a 140-acre community park with fitness center, pool, daycare, disc golf, and recreation programs.

Non-emergency line. For emergencies, call 911.

Founded 2002. Preserves historical structures and landmarks. Headquartered in an 1872 Italianate house.

Township government providing general assistance, road maintenance, and property assessment.

Member-driven business organization. Publishes an annual Community Guide and promotes local business.

Elementary school district serving Marengo and Union. Pre-K through 8th grade.

Public library serving Marengo and Union. Part of the PrairieCat system.

Small K-8 district in Riley Township. Students attend Marengo High School for grades 9-12.

Township government south of Marengo. Oldest town hall in McHenry County (1868).

Internet, wireless, and landline service. Covers about 85% of Marengo. Fiber limited.

Electric delivery utility serving all of northern Illinois. Outage reporting available 24/7.

DSL and fiber internet, plus landline phone service. Fiber availability is limited.

Local waste hauler contracted by the city. 95-gallon trash tote and 65-gallon recycling toter. Yard waste April through December.

Natural gas distribution for northern Illinois. Report gas leaks 24/7.

Broadband, cable TV, and phone. Covers approximately 99% of Marengo. Speeds up to 1 Gbps.

Full-service USPS post office. ZIP code 60152.

On-demand curb-to-curb transit serving Marengo. Call at least one day ahead. Mon-Fri 6 AM-7 PM, Sat 9 AM-5 PM.

Italian restaurant on State Street. Lunch, dinner, catering, and takeout.

Cafe on Grant Highway.

Convenience store, gas station, and pizza.

American restaurant on State Street.

Coffee and donut shop on east Grant Highway. Open daily 4 AM to 8 PM.

Prepared meals, ready-to-order items, and specialty goods on State Street.

Bar and grill on east Grant Highway.

Diner open since 1992. Breakfast and lunch, Mon–Sat 6 AM–3 PM.

Bucciferro Family McDonald’s on Grant Highway.

Chinese restaurant in downtown Marengo.

Bar and grill on State Street.

Local bar and gathering spot.

Chicago-style pizza, pasta, and Italian fare on Telegraph Street.

Pizza and Italian fare on Prairie Street, near City Hall.

Sandwich chain on Grant Highway.

Fast food restaurant on Route 20.

Bar and restaurant on State Street. Class A liquor license approved March 2026.

Wing restaurant on south State Street.

Shooting range and firearms retailer.

Discount retail store on Grant Highway.

Retail shop on State Street.

Family-owned florist specializing in wedding designs, funeral arrangements, and gift baskets.

Family-owned grocery store with bakery, deli, meat, and produce departments. Open daily 6:30 AM to 9 PM.

Local sweets and baked goods.

Local honey and natural products.

Pet store and low-cost animal services. Active community supporter.

Nail salon and spa on State Street.

Full-service veterinary hospital for dogs and cats.

Independent pharmacy with drive-up window, delivery, compounding, and immunizations.

General and cosmetic dentistry practice.

Family dental practice on State Street, serving the community since 1997.

Optometry practice offering eye exams, glasses, and contact lenses.

24/7 fitness center with cardio, strength equipment, and functional training.

Full-service salon offering hair, nails, tanning, and waxing on State Street.

Insurance agency on north State Street.

Full-service bank branch on Washington Street.

Community bank on east Grant Highway.

Real estate brokerage serving Marengo and McHenry County.

Insurance and financial services office on Grant Highway.

Financial advisory office on Grant Highway.

Tax preparation and filing services on State Street.

Community bank branch on State Street.

Nationwide insurance agent. Home, auto, business coverage.

State Farm insurance agent on State Street.

Financial planning and advisory services.

Independent insurance agency. Home, auto, business, and life insurance.

Locally headquartered community bank. Main office on west Grant Highway.

Convenience store and gas station on north State Street.

Family-owned tire and auto repair shop since 1975. Towing, brakes, tune-ups, and diagnostics.

Collision repair, glass replacement, and detailing for vehicles and RVs.

Used car dealership and service center on west Grant Highway, in business since 1996.

Travel center and gas station on east Grant Highway.

Golf course in the Blackstone community on the east side of Marengo.

Day care and early learning center.

Nursing home and long-term care facility on Grant Highway.

Funeral home and cremation services on Grant Highway.

Nonprofit providing disability services and community programs.

Self-storage facility on east Grant Highway with various unit sizes.

Custom embroidery and apparel.

Metal products manufacturer near City Hall on Prairie Street.

Headquarters of the world's largest collector car auction company.

Forklift and materials handling equipment manufacturer. Marengo’s largest employer.

Tree trimming, removal, and landscaping services.