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Eastern milksnake (Lampropeltis triangulum)

The eastern milksnake is a non-venomous snake in the family Colubridae. GBIF holds 3,536 licensed U.S. records of it; it reaches our listing threshold in 40 states, most of all Pennsylvania (520), New York (330) and Michigan (285). Its observation records peak in June.

Eastern milksnake (Lampropeltis triangulum)
Photo: Peter Paplanus from St. Louis, Missouri, CC BY 2.0, via Wikimedia Commons
40states on record
3,536licensed U.S. records
Junpeak month, observations
Novenomous to people

The milk snake or milksnake (Lampropeltis triangulum), is a species of kingsnake; there were once up to 24 subspecies recognized, however fewer are officially recognized today. Lampropeltis elapsoides, the scarlet kingsnake, was formerly classified as a 25th subspecies (L. t. elapsoides), but is now recognized as a distinct species.

From Wikipedia: Milk snake, text under CC BY-SA 4.0.

Bitten? Call 911 for a venomous snakebite or any bite with trouble breathing. For advice on any bite or sting, call Poison Help at 1-800-222-1222 (free, 24/7, U.S.-wide). Do not cut the wound, suck out venom or use a tourniquet. General information, not medical advice. Do not handle or try to identify a snake or spider by this page; if unsure, treat it as venomous.

Is the eastern milksnake poisonous or venomous?

No. The eastern milksnake is non-venomous: it belongs to the family Colubridae, not to the pit vipers or coral snakes, the only U.S. land snakes with medically dangerous venom. It may bite if handled; clean the bite like any small wound.

Often mistaken for

The eastern milksnake is non-venomous, but people often take it for copperheads (both are recorded in 27 of its 40 states) and coral snakes (both are recorded in 9 of its 40 states).

Which states have the eastern milksnake?

Records are spread over 40 states; the top three, Pennsylvania, New York and Michigan, hold 32% of them.

#StateRecordsShare of state snakesRank in state
1Pennsylvania5206.1%6th of 20
2New York3305.5%3rd of 17
3Michigan2855.5%5th of 17
4Kansas2451.7%22nd of 44
5Ohio2143.5%6th of 25
6Virginia2071.9%14th of 30
7North Carolina1720.8%28th of 39
8Texas1480.4%50th of 86
9Massachusetts1427.2%3rd of 13
10Indiana1165.3%6th of 27
11Maryland1103.0%10th of 20
12Connecticut948.1%4th of 14
13West Virginia905.5%5th of 18
14Vermont746.5%2nd of 9
15Tennessee622.4%14th of 32
16Illinois592.1%14th of 33
17Kentucky564.4%9th of 24
18Nebraska492.1%13th of 31
19New Hampshire498.4%3rd of 9
20Maine465.3%5th of 9
21Oklahoma440.3%43rd of 50
22Florida410.2%35th of 49
23Louisiana410.8%20th of 41
24New Jersey413.6%7th of 18
25South Dakota311.0%12th of 16
26Iowa292.8%12th of 22
27Wisconsin262.6%8th of 16
28Missouri251.3%22nd of 36
29Minnesota232.5%8th of 15
30Utah220.7%13th of 28
31Arkansas210.4%23rd of 36
32Alabama180.3%40th of 44
33Mississippi181.0%26th of 38
34South Carolina150.4%37th of 40
35Delaware131.9%9th of 14
36Georgia130.2%34th of 44
37Arizona100.0%58th of 60
38Colorado80.2%20th of 26
39New Mexico80.1%45th of 56
40Rhode Island42.0%5th of 10
Source: GBIF, read 2026-09-29. A state is listed once GBIF holds at least 10 records of the species there under any license; Records counts only CC0 and CC BY records, so a listed state can show fewer.

When is the eastern milksnake seen?

Across the U.S., observation records of the eastern milksnake run mostly May through October, peaking in June with 29% of them. Almost none are from December to February.

January: 1 observation record (0%)JanFebruary: 0 observation records (0%)FebMarch: 8 observation records (1%)MarApril: 54 observation records (6%)AprMay: 249 observation records (26%)May26%June: 277 observation records (29%)Jun29%July: 101 observation records (10%)Jul10%August: 100 observation records (10%)Aug10%September: 102 observation records (11%)Sep11%October: 64 observation records (7%)Oct7%November: 11 observation records (1%)NovDecember: 2 observation records (0%)Dec

Season by state

Among states whose main season falls within one calendar year, it starts earliest in March (Tennessee) and latest in May (Indiana, Maryland, Massachusetts, New Hampshire, New York, Ohio and Vermont). The most common peak month is June, shared by Illinois, Indiana, Maryland, Massachusetts, New Hampshire, New York and Vermont.

StateMain seasonPeak monthObservation records
New YorkMay through SeptemberJune127
MassachusettsMay through OctoberJune117
OhioMay through OctoberMay110
PennsylvaniaApril through SeptemberMay108
VermontMay through SeptemberJune69
KentuckyApril through OctoberMay46
MarylandMay through OctoberJune38
VirginiaApril through OctoberMay38
TennesseeMarch through AugustMay37
IndianaMay through AugustJune36
New HampshireMay through OctoberJune33
IllinoisApril through OctoberJune30
Source: GBIF observation records (CC0, CC BY) by state and month, read 2026-09-29. States with fewer than 30 observation records with a month are left out.

Where the eastern milksnake is recorded in each state

Pennsylvania

Pennsylvania holds 520 licensed records, the 6th most recorded of 20 snakes listed there. Its observation records in Pennsylvania run mostly April through September, peaking in May; most licensed records come from Allegheny County, Centre County and Crawford County. Next come Westmoreland County (20) and Montgomery County (19).

New York

New York holds 330 licensed records, the 3rd most recorded of 17 snakes listed there. Its observation records in New York run mostly May through September, peaking in June; most licensed records come from Tompkins County, Ulster County and Dutchess County. Next come Chemung County (18) and Tioga County (12).

Michigan

Michigan holds 285 licensed records, the 5th most recorded of 17 snakes listed there. Most of its licensed records in Michigan come from Washtenaw County, Isabella County and Cheboygan County. Next come Charlevoix County (20) and Oakland County (9).

Kansas

Kansas holds 245 licensed records, the 22nd most recorded of 44 snakes listed there. Most of its licensed records in Kansas come from Douglas County, Johnson County and Riley County. Next come Jefferson County (10) and Cheyenne County (9).

Ohio

Ohio holds 214 licensed records, the 6th most recorded of 25 snakes listed there. Its observation records in Ohio run mostly May through October, peaking in May; most licensed records come from Summit County, Scioto County and Franklin County. Next come Cuyahoga County (8) and Portage County (7).

Virginia

Virginia holds 207 licensed records, the 14th most recorded of 30 snakes listed there. Its observation records in Virginia run mostly April through October, peaking in May; most licensed records come from Highland County, Augusta County and Madison County. Next come Fauquier County (14) and Loudoun County (9).

North Carolina

North Carolina holds 172 licensed records, the 28th most recorded of 39 snakes listed there. Most of its licensed records in North Carolina come from Watauga County, Macon County and Graham County. Next come Beaufort County (6) and Rutherford County (6).

Texas

Texas holds 148 licensed records, the 50th most recorded of 86 snakes listed there. Most of its licensed records in Texas come from Brazos County, McMullen County and Val Verde County. Next come Hardin County (6) and Jim Hogg County (5).

Massachusetts

Massachusetts holds 142 licensed records, the 3rd most recorded of 13 snakes listed there. Its observation records in Massachusetts run mostly May through October, peaking in June; most licensed records come from Middlesex County, Worcester County and Essex County. Next come Norfolk County (14) and Barnstable County (12).

Indiana

Indiana holds 116 licensed records, the 6th most recorded of 27 snakes listed there. Its observation records in Indiana run mostly May through August, peaking in June; most licensed records come from Brown County, Newton County and Monroe County. Next come Wells County (8) and Morgan County (6).

Maryland

Maryland holds 110 licensed records, the 10th most recorded of 20 snakes listed there. Its observation records in Maryland run mostly May through October, peaking in June; most licensed records come from Garrett County, Montgomery County and Baltimore County. Next come Frederick County (9) and Washington County (7).

Connecticut

Connecticut holds 94 licensed records, the 4th most recorded of 14 snakes listed there. Most of its licensed records in Connecticut come from New Haven County, Fairfield County and Litchfield County. Next come Middlesex County (10) and Hartford County (7).

West Virginia

West Virginia holds 90 licensed records, the 5th most recorded of 18 snakes listed there. Most of its licensed records in West Virginia come from Randolph County, Preston County and Pocahontas County. Next come Tucker County (10) and Grant County (3).

Vermont

Vermont holds 74 licensed records, the 2nd most recorded of 9 snakes listed there. Its observation records in Vermont run mostly May through September, peaking in June; most licensed records come from Windsor County, Chittenden County and Orange County. Next come Rutland County (12) and Windham County (9).

Tennessee

Tennessee holds 62 licensed records, the 14th most recorded of 32 snakes listed there. Its observation records in Tennessee run mostly March through August, peaking in May; most licensed records come from Stewart County, Monroe County and Sevier County. Next come Davidson County (3) and DeKalb County (3).

Illinois

Illinois holds 59 licensed records, the 14th most recorded of 33 snakes listed there. Its observation records in Illinois run mostly April through October, peaking in June; most licensed records come from Cook County, Jersey County and Iroquois County. Next come Kankakee County (6) and Woodford County (5).

Kentucky

Kentucky holds 56 licensed records, the 9th most recorded of 24 snakes listed there. Its observation records in Kentucky run mostly April through October, peaking in May; most licensed records come from Fayette County, Madison County and Hickman County. Next come Trigg County (3) and Garrard County (2).

Nebraska

Nebraska holds 49 licensed records, the 13th most recorded of 31 snakes listed there. Most of its licensed records in Nebraska come from Thayer County, Cherry County and Cass County. Next come Keith County (2) and Knox County (2).

New Hampshire

New Hampshire holds 49 licensed records, the 3rd most recorded of 9 snakes listed there. Its observation records in New Hampshire run mostly May through October, peaking in June; most licensed records come from Cheshire County, Hillsborough County and Grafton County. Next come Belknap County (5) and Rockingham County (5).

Maine

Maine holds 46 licensed records, the joint 5th most recorded of 9 snakes listed there. Most of its licensed records in Maine come from Hancock County, York County and Waldo County. Next come Cumberland County (5) and Lincoln County (5).

Oklahoma

Oklahoma holds 44 licensed records, the 43rd most recorded of 50 snakes listed there. Most of its licensed records in Oklahoma come from LeFlore County, Atoka County and Cherokee County. Next come Pushmataha County (3) and Choctaw County (2).

Florida

Florida holds 41 licensed records, the 35th most recorded of 49 snakes listed there. Most of its licensed records in Florida come from Gulf County, Palm Beach County and Alachua County. Next come Collier County (3) and Liberty County (3).

Louisiana

Louisiana holds 41 licensed records, the joint 20th most recorded of 41 snakes listed there. Most of its licensed records in Louisiana come from Saint Tammany Parish, Livingston Parish and Jefferson Parish. Next come Morehouse Parish (3) and Plaquemines Parish (3).

New Jersey

New Jersey holds 41 licensed records, the joint 7th most recorded of 18 snakes listed there. Most of its licensed records in New Jersey come from Hunterdon County, Morris County and Somerset County. Next come Atlantic County (6) and Sussex County (3).

South Dakota

South Dakota holds 31 licensed records, the joint 12th most recorded of 16 snakes listed there. Most of its licensed records in South Dakota come from Custer County, Clay County and Hughes County. Next come Charles Mix County (2) and Lyman County (2).

Top counties in the U.S.

#CountyStateRecordsShare of U.S.
1Tompkins CountyNew York732.1%
2Allegheny CountyPennsylvania651.8%
3Washtenaw CountyMichigan501.4%
4Summit CountyOhio501.4%
5New Haven CountyConnecticut421.2%
6Douglas CountyKansas411.2%
7Garrett CountyMaryland401.1%
8Middlesex CountyMassachusetts391.1%
9Ulster CountyNew York381.1%
10Highland CountyVirginia371.0%
11Isabella CountyMichigan320.9%
12Centre CountyPennsylvania270.8%
13Cheboygan CountyMichigan260.7%
14Watauga CountyNorth Carolina260.7%
15Worcester CountyMassachusetts250.7%
Source: GBIF licensed records by county (GADM level 2), read 2026-09-29.

How recent are the eastern milksnake records?

The eastern milksnake record leans on older material: only 28% of dated U.S. records come from 2017–2026, and the median record is from 1979. The oldest dated record is from 1860; the busiest year was 2025, with 152 records.

DecadeRecordsShare
1860s50.1%
1870s100.3%
1880s100.3%
1890s230.7%
1900s722.2%
1910s712.1%
1920s993.0%
1930s3169.5%
1940s2858.5%
1950s2948.8%
1960s2728.1%
1970s2467.4%
1980s2437.3%
1990s1514.5%
2000s1845.5%
2010s2447.3%
2020s81324.4%
Source: GBIF licensed U.S. records with a year, read 2026-09-29.

Species recorded in the same counties

Of the 305 counties where the eastern milksnake is most recorded, 171 are also top counties for the common garter snake, more than for any other snake. Venomous species among its neighbors: the eastern copperhead.

SpeciesShared counties
Common garter snake171
Ring-necked snake160
Northern water snake142
Eastern racer133
DeKay's brown snake124
Eastern rat snake104
Red-bellied snake86
Eastern copperhead venomous82
Source: GBIF licensed records, top counties per species and state, read 2026-09-29.

GBIF records read 2026-09-29. Listed: any license. Counted: CC0/CC BY only. How we count.

About these numbers

A species is listed for a state once GBIF holds at least 10 records of it located inside the state by coordinates, under any license. Every count, share, month and county shown is computed only from records published under CC0 or CC BY, so a listed species can show few or no counted records. Monthly patterns show when people record snakes, which also reflects when people are outdoors. Venomous status follows taxonomy: pit vipers and coral snakes; widow and recluse spiders; the Arizona bark scorpion. Records filed under older names count for the species they belong to today. Full methodology.