| 2811 | Jalousies, metal, manufacturing | |
| 5234 | Jalousies, retail | |
| 2022 | Jalousies, wood frame, manufacturing | |
| 1513 | Jam, manufacturing | |
| 5122 | Jams, jellies and marmalades, wholesale | |
| 5150 | Janitorial machinery and equipment, wholesale | |
| 7493 | Janitorial service on airplanes | |
| 7493 | Janitorial services | |
| 5150 | Janitorial supplies | |
| 7493 | Janitorial work | |
| 5150 | Janitors' supplies, wholesale | |
| 2892 | Japanning metals and metal products, for the trade | |
| 1911 | Japanning of leather | |
| 2914 | Japanning ovens, manufacturing | |
| 2422 | Japans, manufacturing | |
| 2519 | Jar rings, rubber, manufacturing | |
| 2610 | Jars for packaging, bottling and canning, made in glass making plants | |
| 2520 | Jars, plastics, manufacturing | |
| 9214 | Jazz dance companies | |
| 9214 | Jazz dancers, independent | |
| 9214 | Jazz music artist, independent | |
| 9214 | Jazz music groups | |
| 1810 | Jean-cut casual slacks, men's and boys', cut and sewn from purchased fabric | |
| 1810 | Jean-cut casual slacks, women's and misses', cut and sewn from purchased fabric | |
| 5232 | Jeans stores | |
| 1810 | Jeans, girls', cut and sewn from purchased fabric | |
| 1810 | Jeans, infants', cut and sewn from purchased fabric | |
| 1810 | Jeans, men's and boys', cut and sewn from materials owned by others | |
| 1810 | Jeans, men's and boys', cut and sewn from purchased fabric | |
| 1810 | Jeans, women's and misses', cut and sewn from purchased fabric | |
| 1810 | Jeans, women's, misses' and girls', cut and sewn from materials owned by others | |
| 1810 | Jeans, women's, misses' and girls', cut and sewn from purchased fabric | |
| 5122 | Jellies, wholesale | |
| 1513 | Jelly and jam, manufacturing | |
| 1543 | Jelly candies, manufacturing | |
| 1549 | Jelly powders, manufacturing | |
| 1730 | Jerseys, made in knitting mills | |
| 1810 | Jerseys, men's and boys', cut and sewn from purchased fabric | |
| 1810 | Jerseys, women's and misses', cut and sewn from purchased fabric | |
| 3530 | Jet assisted takeoff devices (JATO), manufacturing | |