Below is an alphabetical list of the states that offer some type of access to birth records, along with URLs (addresses) for the required forms.  Keep in mind, that the laws change. All links are up to date as of this posting.

• Alabama records open to adult adoptees. Send request to Alabama Vital Records – Adoption Section, P.O. Box 5625, Montgomery, AL 36103. Use the form found here: http://www.adph.org/vitalrecords/index.asp?id=1567

• Alaska: Records open to adult adoptees age 18 or older. Bureau of Vital Statistics, Alaska Department of Health and Social Services, PO Box 110675, Juneau, AK 99811-0675

• Colorado: Records are open for adoptions finalized between July 1, 1951 and June 30, 1976 or after 1999, unless the birthparent has filed a disclosure veto. Additional information and application is here- http://www.cdphe.state.co.us/certs/adoption.html

• Delaware: Records open to adult adoptees over 21, unless birth parents have signed a declaration of non-release. Form can be found here: http://dhss.delaware.gov/dph/ss/vitalstats.html

• Indiana: Records open for adult adoptees over the age of 21 for adoptions completed prior to January 1, 1994. Identifying information is released only of both the adoptee and the birth parent (named on birth certificate) file a written consent with the registry. Records prior to 1940 are released without court order or mutual consent. Consent form available here: http://www.in.gov/isdh/20371.htm

• Illinois: People  born on or after Jan. 1, 1946 may obtain their non-certified birth certificate. Adopted or surrendered adults can request a non-certified copy of their original Illinois birth certificate. Only people who are at least 21 can receive a non-certified copy of their original birth certificate.
  http://www.idph.state.il.us/vitalrecords/vital/adoptbroch.htm

•  Kansas: records are open for adult adoptees over the age of 18. Records must be requested through the Clerk of the District Court’s office in the county where the adoption took place. Information on birth certificate requests can be found here: http://www.kdheks.gov/vital/adoption_before_adoption.html

• Maine: records are open for adult adoptees over the age of 18. Adoptee must register with state reunion registry. Forms are here: http://www.maine.gov/dhhs/ocfs/cw/adoption/reunionregistry.htm

• Massachusetts:  Original birth certificates are available to adoptees born before April 14, 1974.  Application form is here: http://www.mass.gov/eohhs/docs/dph/vital-records/pre-adoption-app-form.pdf

• Michigan:  Records are open to adult adoptee born before May 28, 1945 or, on or after September 12, 1980, as long as the birthparent has not filed a statement of denial with the Central Adoption Registry (CAR).  Forms are available here: http://www.michigan.gov/dhs/1,1607,7-124-5452_7116_7128—,00.html

• Montana: Adoptees whose adoption took place on or before 7-1-1967 can obtain a copy of the original birth certificate. Adoptions finalized between 7-1-1967 and 9-30-1997 require a court order. Adoptions finalized on or after 10-1-1997, can obtain a copy of the original birth as long as they are 18 and the birth parent has not requested non-disclosure. Request forms are here: https://dphhs.mt.gov/certificates/ordercertificates.shtml

• New Hampshire: Original birth certificate is available to adult adoptees age 18 or older who were born in New Hampshire. Adoptees can obtain a non-certified copy of the unaltered, original birth certificate. Instructions and forms are here: http://www.sos.nh.gov/vitalrecords/Preadoption_birth_records.html#SB335

• New Jersey: Records for adoptions prior to 1940 are open. State archive information for adoption is here: http://www.njarchives.org/links/webcat/queries/cxxadopt.html

• Ohio: Records open for adoptions finalized prior to Jan 1, 1964. A notarized affidavit is required. Information and the required form is here: http://www.odh.ohio.gov/vitalstatistics/legalinfo/adoptpri.aspx

• Oregon: Adult adoptees age 21 or over may obtain a copy of their original birth certificate.  Information and request forms are here:
  http://public.health.oregon.gov/birthdeathcertificates/getvitalrecords/pages/preadopt.aspx

• Tennessee: Records are open for adoptions completed on or after March 16, 1951. To apply for information you must use the form contained in this PDF:http://www.state.tn.us/sos/rules/0250/0250-07/0250-07-12.pdf  Skip all the mumbo jumbo and head to page 27 for the forms.

For some adoptees in these states, information gathering starts with a great leap forward!  If you have additional questions on how to request your records, call the Bureau of Vital Statistics for the state where you were born/adopted.

Ask them what the procedure is for requesting your original birth certificate and any other information held in your adoption file. If they are clueless, and you know the agency that placed you for adoption, call them and ask for more information.