| Address | Map | Ethnicities | Businesses | Families |
| 7 Adams St. | 38 | Armenian, French-Canadian, Irish | Barber, Grocery, Shoes, Periodicals | Bergeron, Beshara, Doyle, Hebert, Lavery, McNaboe, Ryan |
| 188 Branch St. | 42 | Swedish | Grocery | Horndahl |
| 401-405 Bridge St. | 8 | English, Irish | Grocery, Drug Store, Millinery | Arthur, Connor, Prentiss, Stanley, Webster |
| 419 Bridge St. | 7 | Irish | Funeral | McKenna |
| 373 Central St. | 31 | Armenian, Polish, Portuguese | Grocery | Krikorian, Matthews, Tarazkewicz |
| 395-397 Central St. | 30 | Armenian, Portuguese, Turkish | Barber, Grocery | Krikorian, Freitas, Markarian, Romain, Paronian, Tasjian |
| 431-433 Central St. | 29 | Armenian | Confectionery, Variety | Curtis, Depoian, Kalasian, Michaelian |
| 503 Central St. | 28 | Armenian | Tailor | Cady, Marck |
| 512 Central St. | 27 | Irish | Grocery (Real Estate, Bank) | In Depth: Donovan |
| 557 Central St. | 26 | French-Canadian, Irish, Swedish | Drug Store | In Depth: Thomasson |
| 614 Central St. | 25 | French-Canadian, Irish | Grocery, Meats | Beaudoin, Beaudry, McCarty, Tousignant |
| 671 Central St. | 24 | Irish | Grocery | O'Brian |
| 789 Central St. | 23 | Irish | Grocery, Bakery | Hogan, Murray, Rourke, Stoddard, Streeter |
| 810 Central St. | 22 | English, Irish, Jewish-Polish | Grocery, Tailor | Creevan, Farrell, Jackson, Nolan, Rosenbloom, Sheehan |
| 886 Central St. | 21 | Irish, Italian, Jewish-Polish, Jew-Russian | Grocery, Plumber | Iannuzzo, Miller, Roche |
| 11 Concord St. | 14 | English, French-Canadian, Irish, Polish | Bakery, Barber, Variety | Banis, Halstead, Langlois, Noon, Oozoonian |
| 61-65 Concord St, | 15 | Irish, Jewish-Russian, Lithuanian | Grocery, Tailor, Variety | Rouine, Saladka, Stack, Vagenheim |
| 139 E. Merrimack St. | 9 | Turkish | Grocery | Sukri |
| 163 E. Merrimack St. | 10 | Irish, Scottish, English, Syrian, French-Canadian | Baker, Grocery | Booth, Brennan, Carney, Carroll, Cavanaugh, Cronin, Favreau, McCartin, Perham, Saba, Somes, Watson |
| 179-183 E. Merrimack St. | 11 | Armenian, English-Scottish, French-Canadian, Syrian, Turkish | Fruits, Variety | Abraham, Bryant, Esmail, Hough, Ingham, Kirajian, Lacroix, Sanborn |
| 191-195 E. Merrimack St. | 12 | Armenian, Turkish, French-Canadian | Confectionery, Grocery, Shoes | Agnatovich, Conant, Esmail, Laughton, Lusignan, Melokian, Quimby, Thompson, Tousignant, Vieliska |
| 92-98 Gorham St. | 32 | Portuguese | Clothing, Retail | Picanso, Sousa |
| 624 Gorham St. | 20 | Swedish | Drug store | Wilson |
| 698-704 Gorham St. | 19 | Irish | Grocery, Liquors | McHugh |
| 1018-1022 Gorham St. | 18 | French-Canadian, Irish, Jewish-Lithuanian | Grocery (Trucking, Textile Mills) | LeLacheur, McKinnon, In depth: Stoloff, Weinberg |
| 124 High Street | 13 | Armenian | Dressmaker | Sookikian |
| 165 Lakeview Ave. | 6 | Irish, Polish | Grocery, Meats | McCloskey, Korzeniewski, Kosztyla (=Costello) |
| 172 Lakeview Ave. | 5 | Polish | Dry Goods, Photography | In Depth: Banas |
| 744-748 Lakeview Ave. | 2 | French-Canadian | Barber, Dry Goods, Shoes | Boudreau, Faveau, Poissant, Trudeau |
| 573 Lawrence St. | 16 | English | Grocery | In depth: Greenwood |
| 42-48 Mammoth Rd. | 1 | French-Canadian, Scottish | Drug Store, Grocery | McKinley, Laporte |
| 199 Market St. | 34 | Greek | Grocery | Vlahos |
| 343 Market St. | 35 | Irish, Greek | Funeral | Dwyer, Molloy, Psalekis |
| 509-511 Market St. | 36 | Irish | Grocery, Liquors | In depth: Keyes |
| 611-613 Merrimack St. | 37 | French-Canadian, Greek | Cigarette Mfq, Liquors, Shoes | Boutsalis, Dubois, Goudreau, In depth: Johnson, In depth: Marcopoulos |
| 138 Middlesex St. | 33 | Ukranian | Shoes | In depth: Evpak |
| 637 Middlesex St. | 39 | French-Canadian, Irish, Jewish-Russian | Dry Goods, Grocery | Bourgeois, Boyle, Siskind |
| 121 Moore St. | 17 | Swedish | Grocery | Berntson |
| 195 W. Sixth St. | 4 | French-Canadian | Variety | Clement |
| 331-339 W. Sixth St. | 3 | French-Canadian | Grocery, Hardware, Real Estate | Bourret, Delisle, Gervais |
| 289 Westford St. | 40 | French-Canadian, Irish, Greek, Jewish-Polish | Confectionery, Variety | Boyle, Bucuvalas, Courtney, Nerny |
| 343-349 Westford St. | 41 | French-Canadian, Greek, Irish, Jewish-Polish | Barber, Grocery, Real Estate, Tailor | Antonopoulos, Bernstein, Fitzpatrick, Perron, Stevens |
| Address | Map | Ethnicities | Brief/With Family Details |
| 220 Baldwin St. | b | Canadian-English, Scottish | w/ family details |
| 21 Branch St. | g | French-Canadian, Cambodian | brief |
| 12-14 Carlton St. | j | Irish, English-Scottish, French-Canadian, South East Asian | brief |
| 490 Central St. | k | French-Canadian, Irish, Polish, Canadian-English | w/ family details |
| 512 Central St. | m | Irish, English, Scottish-Irish, Turkish, Polish, Portuguese | brief |
| 547 Central St. | l | English, French-Canadian, Italian | brief |
| 594-600 Central St. | n | Irish, Chinese, Portuguese, Armenian, Polish, Italian, French-Canadian, South East Asian | w/ family details |
| 7-9 Gates St. | i | Yankee, Irish, French-Canadian, Scottish, Jewish-Russian, Hispanic, Cambodian | w/ family details |
| 27 Loring St. | c | Yankee, Hispanic | brief |
| 716 Middlesex St. | h | French-Canadian, Armenian, South East Asian | w/ family details |
| 1717 Middlesex St. | a | Yankee, Greek, Indian | w/ family details |
| 16 Pine St. | d | English, South East Asian | brief |
| 295-301 Westford St. | f | Jewish-Russian, French-Canadian, Greek, Armenian, Scottish, South East Asian | brief |
| 311-317 Westford St. | e | Irish, French-Canadian, Scottish, Jewish-Austrian, Canadian-English, Syrian, Swedish, Jewish-Russian, Cambodian, South East Asian | w/ family details |
