Courthouses in Ayer, Massachusetts, the US. Courthouses locations in Ayer, Massachusetts. Find the nearest courthouses locations, near you. All types of business services Accounting ATM Courthouse Finance Insurance Lawyer Real estate School All courthouses in Ayer Closed now Ayer District Court Courthouse +1 978-772-2100 25 East Main Street, Ayer, Massachusetts 01432 Write a review Phone Hours Website Directions First District Court of Northern Middlesex Courthouse Ayer, Ayer, Massachusetts 01432 Write a review Phone Directions