| Business | Phone |
| Newmarket Community Ctr 200 Doug Duncan Dr, Newmarket | (905) 953-5302 |
| Assisted Rental Housing 465 Davis Dr #318, Newmarket L3Y 2P1 | (905) 898-1007 |
| Lake Simcoe Region Cnsrvtn 120 Bayview Pky, Newmarket L3Y 3W3 | (905) 895-1281 |
| Newmarket Animal Registration 395 Mulock Dr, Newmarket L3Y 8P3 | (905) 953-5322 |
| Newmarket Lawn Bowling Club 400 D'Arcy, Newmarket | (905) 895-1265 |
| Newmarket Mayor's Office 395 Mulock Dr, Newmarket L3Y 8P3 | (905) 895-5193 |
| Newmarket Information Systems 465 Davis Dr, Newmarket L3Y 7T9 | (905) 953-5324 |
| Newmarket Buildings & Bylaws 395 Mulock Dr, Newmarket L3Y 8P3 | (905) 953-5320 |
| Newmarket Youth & Rec Ctr 244 Main St S, Newmarket L3Y 3Z5 | (905) 953-5120 |
| Newmarket Health Ctr 194 Eagle St, Newmarket L3Y 1J6 | (905) 895-2381 |
| Newmarket Shared Use Facility 155 Longford Dr, Newmarket L3Y 2Y7 | (905) 953-5308 |
| Newmarket Shared Use Facility 125 Savage Rd, Newmarket L3X 1R3 | (905) 953-5310 |
| Newmarket Purchasing Office 465 Davis Dr, Newmarket L3Y 7T9 | (905) 953-5335 |
| Newmarket Works 623 Timothy St, Newmarket L3Y 1R3 | (905) 953-5315 |
| Newmarket Water/Sewer Billing 395 Mulock Dr, Newmarket L3Y 8P3 | (905) 953-5318 |
| Newmarket Shared Use Facility 255 Brimson Dr, Newmarket L3X 1H8 | (905) 953-5307 |
| Newmarket Councillors Office 465 Davis Dr, Newmarket L3Y 7T9 | (905) 953-5323 |
| Newmarket Theatre 505 Pickering Cres, Newmarket L3Y 8H1 | (905) 953-5122 |
| Newmarket Hydro Commission 500 Water St, Newmarket L3Y 1M5 | (905) 895-2309 |
| Newmarket Community Arena 200 Doug Duncan Dr, Newmarket | (905) 953-5303 |
| Newmarket Operations Dept 623 Timothy St, Newmarket L3Y 1R3 | (905) 953-5115 |
| Newmarket Public Works Svc 395 Mulock Dr, Newmarket L3Y 8P3 | (905) 953-5139 |
| Newmarket Old Town Hall 460 Botsford St, Newmarket L3Y 1T1 | (905) 953-5313 |
| Newmarket Shared Use Facility 330 Burford St, Newmarket L3Y 6L1 | (905) 953-5309 |
| Newmarket Seniors Meeting 474 Davis Dr, Newmarket L3Y 2P3 | (905) 953-5325 |
| Newmarket Shared Use Facility 480 Keith Ave, Newmarket L3X 1V5 | (905) 953-5311 |
| Newmarket Tax Office 395 Mulock Dr, Newmarket L3Y 8P3 | (905) 953-5317 |
| Newmarket Committee-Adjustment 465 Davis Dr, Newmarket L3Y 7T9 | (905) 953-5321 |
| Ray Twinney Pool 100 Eagle St, Newmarket L3Y 1J4 | (905) 953-5301 |
| York Acl-Heritage East 349 Crowder Blvd, Newmarket L3Y 8J5 | (905) 853-6065 |
| Elman W Campbell Museum 134 Main St S, Newmarket L3Y 3Y7 | (905) 953-5314 |
| York Housing Corp 17250 Yonge St, Newmarket L3Y 6Z1 | (905) 895-3223 |
| York Child Care Support 17250 Yonge St, Newmarket L3Y 4W5 | (905) 830-9487 |
| York Provincial Offences Crt 465 Davis Dr, Newmarket L3Y 2P1 | (905) 898-0425 |
| York Transportation Dept 16042 Woodbine Ave, Newmarket | (905) 895-1200 |
| York Water & Wastewater 380 Bayview Pky, Newmarket | (905) 895-9291 |
| York Social Svc 62 Bayview Pky, Newmarket L3Y 3W3 | (905) 895-5166 |