Sidney is a town in Kennebec County, Maine, home to about 4,790 people across 42 square miles. It has no ZIP code of its own: it’s part of 04330.
Homes sold for a median of $211 per square foot in the three months ending August 2026, a seller’s market.
Mostly Augusta; part is in Sidney
Each card is that ZIP code’s whole market, including any part outside Sidney. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Sidney’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Portland International Jetport (PWM)54 miles away |
|---|---|
| Closer regional airport | Augusta State Airport (AUG)2 miles away |
| Nearest city of 250,000+ | Boston, MA151 miles away |
| Nearest city of 1 million+ | New York, NY330 miles away |
Straight-line distances from the center of Sidney; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Sidney had 4,645 residents in the 2020 census, up 32% since 2000.
It’s the 72nd largest of 519 towns in Maine by population.
Kennebec County grew from 59,117 residents in 1900 to 123,642 in 2020.
Kennebec County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 80°F in summer, and winter lows average 12°F. About 41.8 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Augusta State Ap, ME weather station (2 miles away).
49,617 jobs at 3,318 businesses in Kennebec County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1,184 doctors and other health care providers list an office in Sidney.
Nearest hospitals
Providers with an office here
| Primary care doctors | 117 |
|---|---|
| Specialist doctors | 209 |
| Dentists | 59 |
| Nurse practitioners and physician assistants | 268 |
| Mental health providers | 345 |
| Physical and occupational therapists | 147 |
| Optometrists | 22 |
| Chiropractors | 17 |
| Pharmacies | 17 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (26 nearby)
Grocery stores (5 nearby)
Pharmacies (8 nearby)
Libraries (4 nearby)
Museums (5 nearby)
Theaters and performance venues (3 nearby)
Counts are within about 4.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1792.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Rsu 12, Rsu 18, Augusta Public Schools and others. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Chelsea Elementary SchoolChelsea | Pre-K–8 | 262 | Public | 5.0 mi |
| James H Bean SchoolSidney | Pre-K–5 | 300 | Public | 8.2 mi |
| Sylvio J Gilbert SchoolAugusta | Pre-K–6 | 305 | Public | 1.0 mi |
| Farrington SchoolAugusta | K–6 | 306 | Public | 1.4 mi |
| Lillian Parks Hussey SchoolAugusta | K–6 | 235 | Public | 0.3 mi |
| Lincoln SchoolAugusta | K–6 | 291 | Public | 1.2 mi |
| Cony Middle SchoolAugusta | 7–8 | 321 | Public | 1.0 mi |
| Maine Virtual AcademyAugusta | 7–12 | 475 | Charter | 0.7 mi |
| ConyAugusta | 9–12 | 662 | Public | 1.0 mi |
| Maine Arts Academy SchoolAugusta | 9–12 | 245 | Charter | 2.0 mi |
| Capital Area Technical CenterAugusta | — | — | Career and Technical | 1.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Childrens Ctr-Early Interven and Fam Support Inc.Augusta | Pre-K–3 | 11 | Nonsectarian | 1.9 mi |
| St Michael SchoolAugusta | Pre-K–8 | 153 | Roman Catholic | 1.1 mi |
| Spurwink-ChelseaChelsea | 2–12 | 35 | Nonsectarian | 4.6 mi |
| Nfi Sidney River Bend SchoolSidney | 9–12 | 8 | Nonsectarian | 12.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Augusta and Chelsea.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.