Jason Sager & Associates
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3 of these firms are based in Mount Prospect; the others serve Mount Prospect from towns including Chicago (20 mi), Schaumburg (8 mi) and Oakbrook Terrace (15 mi).
5 open 24/7 · 10 open weekends · 20 rated 4.5+ · 2 show a license
Data verified October 18, 2026
These 24 firms listed for Mount Prospect, IL handle immigration matters for people and employers. What each states about case types, accreditation and languages spoken comes from its own website; ratings and quotes come from public reviews.

The 24 firms on this page are rated from 4.2 to 5.0 across 3,322 reviews; 21 have 50 or more reviews and 20 are rated 4.5 or higher. When clients rate these firms on specific qualities, they most often praise professionalism (94%), responsiveness (81%) and quality (79%). The topics that come up most in reviews of the firms on this page are "expertise", "results" and "trust". 5 are open around the clock; 10 are open on Saturdays and 6 on Sundays. The practice areas the firms on this page list most often on their websites are immigration (5), personal injury (3), adjustment of status (2), all practice areas (2) and bankruptcy (2). 2 show a license on their websites and 7 have a BBB rating of A or A+. 16 have ten or more years of experience, the longest 43 years. 5 offer urgent consultations; 7 offer a free initial consultation and 1 is family- or locally-owned. 2 have Spanish-speaking staff. We have a website on file for all 24 of the firms on this page; 23 publish a contact page and 16 list a public email. We count these figures across the firms on this page; distances are straight-line, and hours and prices change, so confirm the details with the firm before you book a consultation.
3 of the 24 firms give an address inside Mount Prospect. The rest come from other towns, because immigration work is rarely tied to one neighborhood. Ask about the court or office that handles your matter instead.