Verified Nov 2026
Castings & Forgings
·
Dubuque, Iowa
·
Since 1856
A.Y. McDonald Mfg. Co. is a family-owned manufacturer of water works, plumbing, pump, and natural gas distribution products, headquartered in Dubuque, Iowa. Founded in 1856, it employs roughly 500 to 1,000 people and reports estimated annual revenue in the $100 to $250 million range. The company serves municipal water authorities, commercial plumbing contractors, natural gas utilities, and industrial equipment and automotive customers. In 2026 it opened a new brass foundry in Dickeyville, Wisconsin, and a new manufacturing facility in Bristol, Tennessee.
A.Y. McDonald Mfg. Co. at a glance
Revenue
$100-250M
Est. band
Employees
500-1,000
Founded
1856
Headquarters
Dubuque, Iowa
Certifications
ISO 9001
Import activity
1307
Industries
Automotive
Electric Vehicles
Plumbing & Hardware
Industrial Equipment
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
1307
Named foreign suppliers
50
Top origins
China · Taiwan · Indonesia · South Korea
Shared foreign counterparties do not establish that these companies buy from A.Y. McDonald Mfg. Co..
What this tells a buyer
The company's most recent reported developments include the opening of a new brass foundry in Wisconsin, reported in 2026, and a ribbon cutting for a Bristol, Tennessee facility in September 2026.
Its listed capabilities span castings and forgings, machining, assembly, molding, and plastic work, and it holds ISO 9001 certification.
The company is privately held and has operated for more than 170 years, with additional facilities in Albia, Iowa, and Elizabethton, Tennessee.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
170 years in operation (founded 1856).
Holds ISO 9001 certification(s) per public sources.
Overview
A.Y. McDonald Mfg. Co. is a family-owned manufacturer of water works, plumbing, pump, and natural gas distribution products, headquartered in Dubuque, Iowa. Founded in 1856, it employs roughly 500 to 1,000 people and reports estimated annual revenue in the $100 to $250 million range. The company serves municipal water authorities, commercial plumbing contractors, natural gas utilities, and industrial equipment and automotive customers. In 2026 it opened a new brass foundry in Dickeyville, Wisconsin, and a new manufacturing facility in Bristol, Tennessee.
At a glance
Attribute | Detail |
|---|---|
Founded | 1856 |
Headquarters | Dubuque, Iowa |
Employees | 500-1,000 |
Revenue | $100-250M (estimated) |
Primary capability | Castings & Forgings |
Certifications | ISO 9001 |
What A.Y. McDonald Mfg. Co. makes
Its listed capabilities span castings and forgings, machining, assembly, molding, and plastic work, and it holds ISO 9001 certification.
Products and capabilities described on the company's own site include Assembly, Machining, Plastic, Casting, Mold (source: aymcdonald.com).
Certifications
A.Y. McDonald Mfg. Co. is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 9001 — aymcdonald.com
Trade and customs footprint
The company's most recent reported developments include the opening of a new brass foundry in Wisconsin, reported in 2026, and a ribbon cutting for a Bristol, Tennessee facility in September 2026. US customs bill-of-lading records list 1307 inbound shipments across 50 foreign suppliers, with top origins including China · Taiwan · Indonesia · South Korea.
Latest developments
2026-10-06 — New Brass Foundry Opens in Wisconsin | A.Y. McDonald Manufacturing Co. | Foundry Management & Technology (foundrymag.com)
2026-09-17 — A new chapter for A.Y. McDonald began this week with the official ribbon cutting of our new Bristol, TN, facility. ✂️ | A.Y. McDonald Mfg. Co. (linkedin.com)
2026-08-13 — Russell Earns ENR Midwest Award of Merit for A.Y. McDonald Foundry - Russell Construction (russellco.com)
2026-06-06 — A.Y. McDonald starting transition to new Dickeyville foundry | Tri-state News | telegraphherald.com (telegraphherald.com)
2026-01-05 — 2026 is huge for A.Y. McDonald. With our new brass foundry in Dickeyville, WI and our new manufacturing facility in Bristol, TN coming online later this year, we’re investing in our future … | A.Y. McDonald Mfg. Co. (linkedin.com)
2025-08-19 — Celebrating a Major Milestone: Topping Out at A.Y. McDonald’s Brass Foundry (needham-dbs.com)
Facilities
A.Y. McDonald Mfg. Co. is headquartered in Dubuque, Iowa. Public sources also reference these locations:
Dubuque, Iowa — aymcdonald.com
Dubuque, IA — aymcdonald.com
Company details
The company is privately held and has operated for more than 170 years, with additional facilities in Albia, Iowa, and Elizabethton, Tennessee. A.Y. McDonald Mfg. Co. was founded in 1856, has an estimated 500-1,000 employees, and is headquartered in Dubuque, Iowa. On the LightSource stability read it is rated "Established & active": 170 years in operation (founded 1856). Holds ISO 9001 certification(s) per public sources.
Frequently asked questions
What does A.Y. McDonald Mfg. Co. make?
A.Y. McDonald Mfg. Co. is a family-owned manufacturer of water works, plumbing, pump, and natural gas distribution products, headquartered in Dubuque, Iowa. Founded in 1856, it employs roughly 500 to 1,000 people and reports estimated annual revenue in the $100 to $250 million range. The company serves municipal water authorities, commercial plumbing contractors, natural gas utilities, and industrial equipment and automotive customers. In 2026 it opened a new brass foundry in Dickeyville, Wisconsin, and a new manufacturing facility in Bristol, Tennessee.
Where is A.Y. McDonald Mfg. Co. headquartered?
A.Y. McDonald Mfg. Co. is headquartered in Dubuque, Iowa (4800 Chavenelle Rd, Dubuque, Iowa, 52002).
When was A.Y. McDonald Mfg. Co. founded?
A.Y. McDonald Mfg. Co. was founded in 1856.
How big is A.Y. McDonald Mfg. Co.?
A.Y. McDonald Mfg. Co. has an estimated 500-1,000 employees, with revenue in the $100-250M range (estimated).
What certifications does A.Y. McDonald Mfg. Co. hold?
A.Y. McDonald Mfg. Co. lists ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Does A.Y. McDonald Mfg. Co. import from overseas suppliers?
US customs bill-of-lading records show 1307 inbound shipments for A.Y. McDonald Mfg. Co., with top origins including China · Taiwan · Indonesia · South Korea.
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Last verified Nov 2026. Is this your company? Request a correction.
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