- Land Surveyor, Houghton - Land Surveying Services
- Late Night Restaurants, Houghton
- Lawn & Garden Equipment & Supplies, Houghton
- Lawn Mowers & Power Equipment, Houghton
- Lawyers & Attorneys, Houghton
- Legal Professionals, Houghton
- Libraries, Houghton
- Life Insurance, Houghton
- Lighting Fixtures & Equipment, Houghton
- Liquor Stores, Houghton
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