He came to Muncy 1788-1790 as did brother Benjamin, Jr. per "Now and Then" Vol. XXII April 1990 #1 He came to Muncy area about 1787, the house where he lived still stands, now an inn.

He was married to Mary LLOYD (daughter of John LLOYD and Mary DAVID) in 1787. Mary LLOYD , was born on 26 September 1764 in Quakertown, Bucks Co, PA. She died on 12 August 1838 in Muncy, Lycoming, PA. She was buried in Walton Cemetery, Muncy, Lycoming Co., PA. (per photo from Evelyn McCarty Bryan, PO Box 147, Picture Rocks, PA)

William MCCARTY and Mary LLOYD had the following children:
1. Benjamin MCCARTY (born on 22 December 1788).
2. Margaret MCCARTY (born on 12 March 1790).
3. Silas MCCARTY (born on 19 December 1791).
4. Ann MCCARTY was born on 28 March 1793 in Muncy, Lycoming, PA.
5. John MCCARTY was born on 4 November 1794 in Muncy, Lycoming, PA. He died on 29 June 1884.
6. William MCCARTY (born on 7 October 1796).
7. Mary "Molly" MCCARTY was born on 19 September 1798 in Muncy, Lycoming, PA. She died on 13 April 1877.
8. Jane MCCARTY (born on 6 April 1800).
9. Lavinia MCCARTY (born on 4 February 1802).
10. David MCCARTY was born on 1 July 1804 in Muncy, Lycoming, PA. (Composition BK PG 28)
11. Sarah MCCARTY (born on 7 February 1806).
12. Maj. Seth L. MCCARTY (born on 9 June 1808).
13. Joseph MCCARTY was born on 25 August 1810. He died INFANT. (Composition BK PG 28)
14. Lloyd MCCARTY (born on 8 November 1811).

Sources:
1. Grave photo from Evelyn McCarty Bryan
2. (36) Composition Book PG 28
3. Per Friant & Armstrong e-mails
4. Born 1763 per Karen Haskett
5. Per "Now and Then" Vol. XXII April 1990 #1