Cathy O'Rourke from Southampton shows her Irish pride during the...

Cathy O'Rourke from Southampton shows her Irish pride during the St. Patrick's Day Parade in Hampton Bays on Saturday, March 18, 2017.  Credit: Randee Daddona

Irish pride swells on Long Island all month long, when St. Patrick's Day parades big and small are held across both counties. Wear your best green and celebrate at these local parades:

NASSAU

GLEN COVE Parade kicks off at Finley Middle School, onto Forest Avenue south of Dosoris Lane, then follows Brewster Street to School Street. From there it moves into Glen Street ending at St. Patrick’s Church. Grand Marshal of this year’s parade is local business owner Gerard "Gerry" Herbert; 1 p.m., March 20; glencoveparade.com.

ROCKVILLE CENTRE Parade steps off at Long Beach Road and Maple Avenue, continues along Maple Avenue ending on North Village and Quealy Place. Ellen White is the 2022 Grand Marshal; noon March 19; rvcstpatrick.com.

WANTAGH Parade route is Wantagh High School on Wantagh Avenue to Triangle Park on Railroad Avenue. Grand Marshal is Patrick Ryder; 2 p.m., March 20; wantaghchamber.wildapricot.org.

SUFFOLK

BRENTWOOD Route begins at Washington Avenue and Clarke Street, south on Washington Avenue to Ross Park on Brentwood Road; 1 p.m., March 19; 631-273-4443.

HAMPTON BAYS Parade route starts at Hampton Bays Elementary School on Ponquogue Avenue to Montauk Highway. Grand Marshal is Michael Quinlan; 11 a.m. March 19; hbstpatricksdayparade.com, 516-297-2563.

JAMESPORT Parade route kicks off at North Railroad and Washington Avenues and ends at the Jamesport firehouse. The 2022 Grand Marshal is Dawn Thomas; 1 p.m., March 26; 631-461-3884.

LINDENHURST Parade begins at Firemen’s Memorial Park and heads west on Hartford Street to Wellwood Avenue, ending at Lindenhurst Middle School. Congressman Peter King is the 2022 Grand Marshal; 11 a.m., March 26; facebook.com.

MONTAUK Parade route runs up Edgemere Road then turns on to Main Street past the reviewing stand on the green and finishes at the end of Main Street by the IGA. Grand Marshal is Marilyn Behan; noon, March 27; montaukfriendsoferin.org, 631-668-1578.

PATCHOGUE Parade runs along Main Street. Grand Marshal is Dennis Smith; noon, March 20; patchogue.com.

RONKONKOMA Parade starts at the corner of Patchogue-Holbrook and Portion roads, continues from Portion Road to Ronkonkoma Avenue, south on Hawkins Avenue to Church Street and ends St. Joseph’s Church. Grand Marshal is Gerry McMenamin; 2 p.m., March 27; ronkonkomaparade.org.

ST. JAMES The St. James Chamber of Commerce St. Patrick’s Day parade begins on Woodlawn and Lake Avenues and proceeds north to the LIRR Station. There will be piper bands, marching bands, Scout troops, dance groups, floats, fire trucks, antique cars and more; 1 p.m., postponed from March 12 to April 2 due to predicted inclement weather; stjameschamber.org, 631-584-8510.

Compiled by Gina Tabarus with Keri Wall-Treudler, LaToya Rodriguez and Daniel Variano.

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