| NMNCAM Monarch Mountain | Tulelake | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| NLNevada Las Vegas 5565 S Decatur Boulevard | Las Vegas | NV | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NLNevada Las Vegas 6001 South Decatur Boulevard | Las Vegas | NV | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NLNevada Las Vegas Festival Plaza Drive | Las Vegas | NV | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NLNevada Las Vegas Ponderosa Way | Las Vegas | NV | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NLNevada Las Vegas Procyon | Las Vegas | NV | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NRNevada Reno Capital Court | Reno | NV | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NRNevada Reno Longley Lane | Reno | NV | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NNewberg | Newberg | OR | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NBNew Berlin - Schmitz Read Mix | New Berlin | WI | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NNewbury | Newbury | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NHNew Hope (International Packaging) | New Hope | MN | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ◐ LIKELY ACTIVE |
| NHNew Hope (Taber-Busnell Inc) | New Hope | MN | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ◐ LIKELY ACTIVE |
| NJNew JerseyHamilton 3620 Quakerbridge Rd | Hamilton | NJ | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NMNew Mexico Albuquerque Masthead Street | Albuquerque | NM | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NMNew Mexico Albuquerque Silver Creek Road | Albuquerque | NM | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NRNew River Ready Mix | Peoria | AZ | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NGNewtown Granite Works | Newtown | CT | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NRNiles Ready Mix | Niles | MI | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NNissen | Oregon | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NKN. Kingsville | Conneaut | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Canton | North Canton | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Cary 15501 Weston Parkway | Cary | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Charlotte 11517 E Cordage St | Charlotte | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Charlotte 3000 Crosspoint Center Ln | Charlotte | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Charlotte 3035 Horseshoe Lane | Charlotte | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Charlotte 6325 Ardrey Kell Rd | Charlotte | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Charlotte 6701 Carmel Rd | Charlotte | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Granite Corp | Mount Airy | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Granite Corp | Mt Airy | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Morrisville 2000 Aerial Center Parkway | Morrisville | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorth Carolina Wilmington 2908 Orville Wright D | Wilmington | NC | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| NINorthdown Industires - Phoenix | Phoenix | AZ | Nonmetallic Mineral Product Manufacturing327992 | 1-19 | ◐ LIKELY ACTIVE |
| NCNorthern Concrete Pipe Inc. Toledo | Sylvania | OH | Nonmetallic Mineral Product Manufacturing327332 | 1-19 | ◐ LIKELY ACTIVE |
| NMNorth Mankato (Precision Press Inc) | North Mankato | MN | Printing and Related Support Activities323111 | 1-19 | ◐ LIKELY ACTIVE |
| NMNorth Metro | East Bethel | MN | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| NNorthport (Huntington) | Northport | NY | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ◐ LIKELY ACTIVE |
| NRNottingham RMC Plant | Nottingham | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| NONWA Office | Rogers | AR | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| OPOceanside Plant | Oceanside | CA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◐ LIKELY ACTIVE |
| ODODL - Dallas, TX | Garland | TX | Nonmetallic Mineral Product Manufacturing327215 | 1-19 | ◐ LIKELY ACTIVE |
| OHODL - Hagerstown, MD | Hagerstown | MD | Nonmetallic Mineral Product Manufacturing327215 | 1-19 | ◐ LIKELY ACTIVE |
| ORODL - Reno, NV | Sparks | NV | Nonmetallic Mineral Product Manufacturing327215 | 1-19 | ◐ LIKELY ACTIVE |
| OVODL - Valdosta, GA | Valdosta | GA | Nonmetallic Mineral Product Manufacturing327215 | 1-19 | ◐ LIKELY ACTIVE |
| OFOH - Fairfield 403 | Fairfield | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| OSOH - South Lebanon 402 | Lebanon | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| OOH-Wooster | Wooster | OH | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| OSOkauchee - Schmitz Read Mix | Nashotah | WI | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| OOOklahoma Oklahoma City Will Rogers Parkway | Oklahoma City | OK | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
| OOmacp | Plattsmouth | NE | Nonmetallic Mineral Product Manufacturing327332 | 1-19 | ◐ LIKELY ACTIVE |