Where Boston's local businesses are most crowded

Dentists

2,346 recorded across the metro, 1.22 per 1,000 households (1.2 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Lawrence (01841) – 17,097 households, Dorchester (02125) – 13,759 households, Brockton (02302) – 12,354 households, Lowell (01854) – 10,376 households, Haverhill (01832) – 10,306 households. Counts under 3 aren't published, so each could have one or two.

Chiropractors

317 recorded across the metro, 0.16 per 1,000 households (below the U.S. rate of 0.25). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Medford (02155) – 24,586 households, Brighton (02135) – 21,072 households, Salem (01970) – 19,709 households, Lynn (01902) – 19,110 households, South Boston (02127) – 17,895 households, East Boston (02128) – 17,619 households. Counts under 3 aren't published, so each could have one or two.

Veterinarians

227 recorded across the metro, 0.12 per 1,000 households (below the U.S. rate of 0.18). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Malden (02148) – 26,319 households, Revere (02151) – 21,528 households, Brighton (02135) – 21,072 households, Dorchester Center (02124) – 19,987 households, Lynn (01902) – 19,110 households, South Boston (02127) – 17,895 households. Counts under 3 aren't published, so each could have one or two.

Gyms & fitness centers

898 recorded across the metro, 0.47 per 1,000 households (1.8 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Lynn (01902) – 19,110 households, Everett (02149) – 17,262 households, Lawrence (01841) – 17,097 households, Dorchester (02125) – 13,759 households, Chelsea (02150) – 13,522 households, Gloucester (01930) – 13,180 households. Counts under 3 aren't published, so each could have one or two.

Note: Independent personal trainers without employees aren't counted.

Beauty salons

1,945 recorded across the metro, 1.01 per 1,000 households (1.7 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Brockton (02302) – 12,354 households. Counts under 3 aren't published, so each could have one or two.

Note: Booth renters and self-employed stylists aren't counted, so the real number of stylists is much higher than the number of salons.

Nail salons

796 recorded across the metro, 0.41 per 1,000 households (1.8 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Lawrence (01841) – 17,097 households, Cambridge (02139) – 16,062 households, Framingham (01702) – 14,665 households, Cambridge (02138) – 14,239 households, Hyde Park (02136) – 13,570 households, Andover (01810) – 13,279 households. Counts under 3 aren't published, so each could have one or two.

Note: Self-employed nail technicians aren't counted.

Full-service restaurants

4,598 recorded across the metro, 2.39 per 1,000 households (1.2 times the U.S. rate). The most crowded ZIPs:

Fast-food & counter-service restaurants

3,858 recorded across the metro, 2.00 per 1,000 households. The most crowded ZIPs:

General auto repair shops

1,109 recorded across the metro, 0.58 per 1,000 households. The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Brookline (02446) – 14,426 households, Cambridge (02138) – 14,239 households, Boston (02118) – 14,185 households, Andover (01810) – 13,279 households, Boston (02116) – 11,525 households, North Andover (01845) – 11,521 households. Counts under 3 aren't published, so each could have one or two.

Note: Specialty shops (body, transmission, oil change) and car washes are counted separately and aren't included; solo mechanics without employees aren't counted.

Dry cleaners & laundry services

269 recorded across the metro, 0.14 per 1,000 households (2.0 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Plymouth (02360) – 25,822 households, Revere (02151) – 21,528 households, Brighton (02135) – 21,072 households, Salem (01970) – 19,709 households, Lynn (01902) – 19,110 households, Jamaica Plain (02130) – 17,928 households. Counts under 3 aren't published, so each could have one or two.

Note: Coin-operated laundromats are a separate category and aren't included.

Child care centers

1,663 recorded across the metro, 0.86 per 1,000 households (1.5 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Waltham (02453) – 12,684 households. Counts under 3 aren't published, so each could have one or two.

Note: Home-based child care run without employees isn't counted.

Pet care (grooming, boarding, training)

439 recorded across the metro, 0.23 per 1,000 households (1.8 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Quincy (02169) – 28,674 households, Lynn (01902) – 19,110 households, South Boston (02127) – 17,895 households, East Boston (02128) – 17,619 households, Lawrence (01841) – 17,097 households, Cambridge (02139) – 16,062 households. Counts under 3 aren't published, so each could have one or two.

Note: Veterinarians are a separate category; mobile and solo groomers without employees aren't counted.

Law offices

2,887 recorded across the metro, 1.50 per 1,000 households (1.2 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Lawrence (01841) – 17,097 households, Hyde Park (02136) – 13,570 households, Brockton (02302) – 12,354 households, Somerville (02143) – 12,132 households, Haverhill (01832) – 10,306 households. Counts under 3 aren't published, so each could have one or two.

Insurance agencies

1,385 recorded across the metro, 0.72 per 1,000 households (below the U.S. rate of 0.97). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Lynn (01902) – 19,110 households, Lawrence (01841) – 17,097 households, Cambridge (02139) – 16,062 households, Brookline (02446) – 14,426 households, Cambridge (02138) – 14,239 households, Hyde Park (02136) – 13,570 households. Counts under 3 aren't published, so each could have one or two.

CPA offices

687 recorded across the metro, 0.36 per 1,000 households. The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Revere (02151) – 21,528 households, Dorchester Center (02124) – 19,987 households, Lynn (01902) – 19,110 households, Jamaica Plain (02130) – 17,928 households, South Boston (02127) – 17,895 households, East Boston (02128) – 17,619 households. Counts under 3 aren't published, so each could have one or two.

Note: Tax-prep-only offices are a separate category and aren't included.

Investment advisers

386 recorded across the metro, 0.20 per 1,000 households (1.4 times the U.S. rate). The most crowded ZIPs:

Large ZIPs with fewer than 3 recorded: Malden (02148) – 26,319 households, Medford (02155) – 24,586 households, Brockton (02301) – 23,256 households, Revere (02151) – 21,528 households, Brighton (02135) – 21,072 households, Dorchester Center (02124) – 19,987 households. Counts under 3 aren't published, so each could have one or two.