By Robb M. Stewart

OTTAWA--The Canadian economy in April notched its strongest growth in nine months as oil and gas extraction and manufacturing rebounded.

Gross domestic product, a broad measure of goods and services produced across the economy, increased 0.5% from the month before to 2.353 trillion Canadian dollars, the equivalent of US$1.656 trillion, Statistics Canada said Tuesday.

Economists were expecting GDP to risen 0.4 for the month, in line with the data agency's earlier flash estimate. It follows a 0.1% contraction in industry-level activity in March.

Compared with a year earlier, GDP expanded 1.1%.

Statistics Canada said that advance information indicates GDP increased 0.1% month-over-month in May, with increases in finance and insurance and in real estate, rental and leasing partially offset by declines in wholesale trade and agriculture, forestry, fishing and hunting.

Write to Robb M. Stewart at robb.stewart@wsj.com