There are a few resources available to you to find the birth, marriage or death record of your ancestor.
Bay of Quinte Site:
Miscellaneous Vital Records from 1872 on to about 1901 contributed by Eileen Truesdell
Belleville Intelligencer's Persons Over 80 Years Old Article
For other cemetery indexes, try Hastings County Cemeteries.
The Ontario Vital Statistics Project
For early vital statistics, you could try Early Ontario Records.
At Bellevlle Library, these resources are available:
RECORDS OF BIRTHS, MARRIAGES, AND DEATHS
[Baptisms and wills, New York and New Jersey] (Includes Wanamaker, Brickman, Parliament, Redner, and other local families) R 929.3 Bap
Burleigh, H.C. Loyalist graves in the Bay of Quinte region. R 929.37 Bur
Conger, Stephen. The marriage register, 1803-1823, of Stephen Conger, J.P., Hallowell, and "Conger" or "White Chapel" cemetery. R 929.3713 Con
Documents relating to the colonial history of the state of New Jersey : volume XXII : Marriage records, 1665-1800 / edited by William Nelson. R 929.373 Doc
Early Methodist records: Methodist Episcopal Church: Smith's Creek marriage register, 1983-1832; Smith's Creek circuit, 1804-1844; Bay of Quinty circuit, 1835-1846; Napanee circuit, 1843-1853. R 929.3713 Ear
Hamm, John. A marriage register, 31 March 1836 - 3 December 1836, Rev. John Hamm, Bay of Quinte. R 929.3713 Ham
Hancocks, Elizabeth, comp. County marriage registers of Ontario, Canada, 1858-1869. R 929.3713 Han
v. 3 Prince Edward County v. 13 Lennox and Addington County v. 5 Hastings County v. 16 Frontenac County and Kingston City
v. 9 Northumberland County
Langhorn, John. Anglican registers, 1784-1814 / Rev. John Langhorn, rector of Ernestown, Upper Canada. R 929.3713 Lan
McDowell, Robert James. Presbyterian registers of Rev. Robert James McDowell, Missionary to Upper Canada, 1800-1841.
R 929.3713 MacD
McKenzie, Donald A. Death notices from the Canadian Christian Advocate, 1858-1872. R 929.3713 MacK
McKenzie, Donald A. Death notices from the Christian guardian, 1836-1850. R 929.3713 MacK
McKenzie, Donald A. Death notices from the Christian guardian, 1851-1860. R 929.3713 MacK
McKenzie, Donald A. More notices from Methodist papers 1830-1857. R 929.3713 Mack
McKenzie, Donald A. Obituaries from Ontario's Christian guardian, 1861-1870. R 929.3713 MacK
Methodist church baptismal records, 1840-1887, Sidney Township and Tyendinaga Township, Hastings County. R 929.3713585 Met
Methodist church baptismal records, 1841-1888, Prince Edward County, Ont. R 929.3713587 Met
Methodist church baptismal records, 1843-1876, Madoc Township, Hastings County, Ont. R 929.3713585 Met
Neill, Robert. Baptism register of Robert Neill, [Burnbrae Church, Northumberland Co.], 1852-1872, with 14 entries of 1880.
R 929.3713 Nei
Neill, Robert. Marriage register of Rev. Robert Neill, Seymour Township, 1840-1878. R 929.3713 Nei
Old wills, 1790-1858 : late of Surrogate Court, Kingston. R 929.3713 Old
The Ontario register / Edited by Thomas B. Wilson. Volumes 1-8. (Indexed) R 929.105 Ont
Paramus, Bergen County, New Jersey, Reformed Dutch Church baptisms, 1740-1850...with records from the gravestones in the church yard and a list of church members. R 929.3 Par
Piper, Allan B., comp. Marriages from the Hungerford Township registers, Hastings County, Province of Ontario : marriages for the fifty year period 1876-1926. R 929.3713 Pip
Record of marriage licenses issued by A.J. Northrup, 19 August 1873 to 9 November 1886; [and]
9 November 1886 to 19 November 1902. [Belleville] 2 v. R 929.3713 Rec
Reid, William D. Death notices of Ontario [1810-1854]. R 929.3713 Rei
Reid, William D. Marriage notices of Ontario [1813-1854]. R 929.3713 Rei
Surrogate Court index of Ontario, 1859-1900. R 929.3713 Sur
v. 2 Hastings & Prince Edward Counties v. 8 Frontenac County
v. 4 Northumberland & Durham Counties v. 9 Lennox & Addington County
Wanamaker. C.L.R., comp. Obituaries copied from Belleville Intelligencer and Picton Times, November 1965-1978. 3 v.
R 929.371358 Obi
Wanamaker, C.L.R., comp. Obituaries from local newspapers [probably Belleville Intelligencer and Picton gazette], 1975-1984. 2 v.
R 929.371358 Obi
Wesleyan Methodist baptisms, 1834-1898, Lennox and Addington Co., Ont. / Transcribed by Linda E. Corupe. R 929.371359 Wes
Wilson, Thomas B. Marriage bonds of Ontario, 1803-1834. R 929.3713 Wil
Wilson, Thomas B. Ontario marriage notices [1830-1856] R 929.3713 Wil
Young, A.H., ed. Parish register of Kingston, Upper Canada, 1785-1811. R 929.3713 You