How much are property taxes in Groton, CT?

Name: Property taxes in Groton, CT, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Homeowners in Groton, CT pay a median of $5,198 (±$368) a year in real estate taxes (2020–2024 American Community Survey, table B25103).

Homes with a mortgage pay a median of $4,949.

Homes without a mortgage pay a median of $5,506.

That is about 1.5% of the median home value of $340,100.

In Groton, the median real estate tax went from $4,372 in 2015–2019 to $5,198 in 2020–2024 (+18.9%).

Prices (CPI-U) rose 22.7% over the same years; the change is not measurably different from the rise in prices.

Figures last updated on November 12, 2026.

Median real estate taxes: $5,198 (±$368)
With a mortgage: $4,949
Without a mortgage: $5,506
Share of median value: 1.5%

Real estate taxes in Groton against Southeastern Connecticut Planning Region, its state and the nation

Median real estate taxes paid a year, estimate (90% margin of error)
	Groton	Southeastern Connecticut Planning Region	Connecticut	United States
Median real estate taxes	$5,198 (±$368)	$5,228 (±$109)	$6,643 (±$25)	$3,119
Homes with a mortgage	$4,949 (±$398)	$5,223 (±$133)	$6,749 (±$34)	$3,489
Homes without a mortgage	$5,506 (±$537)	$5,235 (±$165)	$6,445 (±$46)	$2,576
Median home value	$340,100 (±$17,454)	$323,400 (±$5,559)	$366,900 (±$1,621)	$332,700

In Groton, the median real estate tax is not measurably different from Southeastern Connecticut Planning Region ($5,228).

It is also lower than in Connecticut ($6,643).

It is higher than the national figure ($3,119).

In Southeastern Connecticut Planning Region, Groton ranks 8 of 19 places with a published estimate, from highest to lowest median real estate taxes.

Statewide, it ranks 131 of 169.

Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.

Taxes as a share of home value in Groton

The median tax ($5,198) is 1.5% of the median home value ($340,100).

Across Southeastern Connecticut Planning Region the same ratio is 1.6%.

Across Connecticut it is 1.8%.

This is a ratio of two medians, a rough effective rate: not the tax rate or mill rate the town, county or school district sets, and not any one home’s bill.

Owners report what they paid and what they think their home is worth; the assessor’s office publishes the actual rates and assessments.

How property taxes in Groton have changed since 2015–2019

2015–2019 and 2020–2024 American Community Survey 5-year estimates
	2015–2019	2020–2024	Amount of change	Verdict
Median real estate taxes	$4,372 (±$160)	$5,198 (±$368)	+18.9%	No measurable change after inflation
Median home value	$242,600 (±$7,838)	$340,100 (±$17,454)	+40.2%	Up after inflation
Median owner cost with a mortgage	$1,873 (±$47)	$2,098 (±$107)	+12.0%	Down after inflation

The Census Bureau publishes 2015–2019 dollars in 2019 dollars and 2020–2024 dollars in 2024 dollars.

Prices (the CPI-U, US Bureau of Labor Statistics) rose 22.7% between 2019 and 2024, so a dollar figure’s verdict compares the two after raising the earlier one by that much, using the Census Bureau’s test for a difference.

The two periods do not overlap, as the Census Bureau recommends for 5-year estimates.

Median real estate taxes in places near Groton

Nearest places with a published estimate, compared with Groton
Place	Distance	Median real estate taxes	Compared with this place
Groton	—	$5,198 (±$368)	—
New London	3.5 mi	$4,977 (±$291)	Not measurably different
Mystic	4.0 mi	$7,437 (±$865)	Higher
Waterford (community)	5.1 mi	$3,414 (±$239)	Lower
Ledyard	5.8 mi	$6,371 (±$292)	Higher
Gales Ferry	5.8 mi	$6,347 (±$844)	Higher
Waterford	6.0 mi	$4,876 (±$236)	Not measurably different
Stonington	6.3 mi	$6,071 (±$320)	Higher
Oxoboxo River	8.3 mi	$3,817 (±$234)	Lower

Nearby places with a measurably lower figure: Waterford (community), CT ($3,414), Oxoboxo River, CT ($3,817).

Nearby places with a measurably higher figure: Mystic, CT ($7,437), Ledyard, CT ($6,371), Gales Ferry, CT ($6,347).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Median real estate taxes across Southeastern Connecticut Planning Region, place by place

Rank	Place	Median real estate taxes
2	Ledyard	$6,371 (±$292)
3	North Stonington	$6,224 (±$430)
4	Colchester	$6,212 (±$184)
5	East Lyme	$6,087 (±$248)
6	Stonington	$6,071 (±$320)
7	Lebanon	$5,646 (±$420)
8	Groton	$5,198 (±$368)
9	New London	$4,977 (±$291)
10	Waterford	$4,876 (±$236)
11	Preston	$4,749 (±$468)
12	Norwich	$4,703 (±$181)
13	Sprague	$4,668 (±$274)
14	Windham	$4,633 (±$231)

Showing 13 of 19 places in Southeastern Connecticut Planning Region, ranked from highest to lowest.

The figures for Groton include the places inside it that have pages of their own: Conning Towers-Nautilus Park, Long Hill (Southeastern Connecticut Planning Region), Noank, Old Mystic, Poquonock Bridge.

Survey years: 2020–2024 (American Community Survey 5-year estimates), compared with 2015–2019.

Margins of error are at the 90% confidence level.

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Questions about Groton

How much are property taxes in Groton?

The median real estate tax paid by homeowners in Groton, CT is $5,198 (±$368) a year (2020–2024 American Community Survey).

What is the property tax rate in Groton?

The Census Bureau does not publish tax rates; as a rough guide, the median tax paid is 1.5% of the median home value in Groton, and the actual rate is set by the town, county and school district.

Have property taxes in Groton gone up?

In Groton, the median real estate tax went from $4,372 in 2015–2019 to $5,198 in 2020–2024 (+18.9%).

Prices (CPI-U) rose 22.7% over the same years; the change is not measurably different from the rise in prices.

Are property taxes in Groton higher than in Southeastern Connecticut Planning Region?

In Groton, the median real estate tax is not measurably different from Southeastern Connecticut Planning Region ($5,228).

It is also lower than in Connecticut ($6,643).

It is higher than the national figure ($3,119).

Sources

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) and detailed tables (acs/acs5) for Groton town, Southeastern Connecticut Planning Region, Connecticut (county subdivision:34250, in state:09 county:180).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The 2015–2019 figures are B25103_001E, B25103_001M, B25077_001E, B25077_001M, B25088_002E, B25088_002M from the 2019 release.

The API needs a free key.

Request a Census API key.

B25103_001E, B25103_001M, B25103_002E, B25103_002M, B25103_003E, B25103_003M, DP04_0089E, DP04_0089M

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.