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October 08, 1807 -
NEW HAVEN gained from LITCHFIELD when town of Middlebury was created from Southbury, Waterbury, and Woodbury.
(Conn. Pub. Acts 1807, p. 800; Conn. Pub. Acts 1808, p. 815)
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May 14, 1807 -
October 08, 1807
NEW HAVEN gained the town of Southbury from LITCHFIELD.
(Conn. Pub. Acts 1807, p. 771)
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May 09, 1799 -
May 14, 1807
NEW HAVEN lost the town of Durham to MIDDLESEX.
(Conn. St. Recs., 9:351)
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October 11, 1798 -
May 09, 1799
NEW HAVEN gained from LITCHFIELD when the town of Oxford was created from Derby and Southbury, and lost to HARTFORD when town of Wallingford lost to Berlin.
(Conn. St. Recs., 9:284-285, 311-313)
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May 02, 1796 -
October 11, 1798
NEW HAVEN gained from HARTFORD when the town of Wolcott was created from Southington and Waterbury.
(Conn. St. Recs., 8:372-373)
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May 11, 1780 -
May 02, 1796
NEW HAVEN lost to LITCHFIELD when the town of Watertown was created from Waterbury.
(Conn. St. Recs., 3:73-75)
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October 09, 1751 -
May 11, 1780
NEW HAVEN lost to creation of LITCHFIELD.
(Conn. Col. Recs., 10:56-58)
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May 11, 1738 -
October 09, 1751
NEW HAVEN lost the towns of Canaan, Cornwall, Goshen, Kent, and Norfolk to HARTFORD.
(Conn. Col. Recs., 8:169-171)
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May 14, 1730 -
May 11, 1738
NEW HAVEN lost the towns of Barkhamsted, Colebrook, Hartland, Harwinton, New Hartford, Torrington, and Winchester to HARTFORD.
(Conn. Col. Recs., 7:272, 387-390, 445-449)
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May 09, 1728 -
May 14, 1730
NEW HAVEN gained town of Waterbury from HARTFORD.
(Conn. Col. Recs., 7:168)
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October 11, 1722 -
May 09, 1728
NEW HAVEN gained from Non-County Area 2.
(Conn. Col. Recs., 6:339)
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May 13, 1708 -
October 11, 1722
NEW HAVEN gained town of Durham from Non-County Area 4. Non-County Area 4 eliminated.
(Conn. Col. Recs., 5:51)
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October 10, 1706 -
May 13, 1708
NEW HAVEN gained town of New Milford from Non-County Area 2.
(Conn. Col. Recs., 5:10)
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May 13, 1675 -
October 10, 1706
NEW HAVEN gained town of Derby from Non-County Area 2.
(Conn. Col. Recs., 2:248-249)
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May 11, 1671 -
May 13, 1675
NEW HAVEN gained town of Wallingford from Non-County Area 2.
(Conn. Col. Recs., 2:152)
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May 10, 1666 -
May 11, 1671
NEW HAVEN created by the Colony of Connecticut as one of four original counties.
(Conn. Col. Recs., 2:34-35)
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